2018 Hyundai Elantra Engine Problems

Your engine failed a second time in July 2025, just 10 months after the first replacement engine was installed under warranty in September 2024. When you moved your car from Hyundai of Mankato to Happy Hyundai of Rochester (an approved Hyundai dealership), Hyundai of America initially refused to honor your one-year unlimited-mileage warranty, but then agreed to cover parts and labor once the vehicle was at their chosen authorized dealer. The warranty dispute has caused significant delays in getting your engine repaired or replaced again.

After getting an oil change at Jiffy Lube, your engine seized while driving and lost all power. The tow truck driver found that an engine part had fallen off on the road and there was no oil left in the engine. Jiffy Lube claimed they weren't responsible, stating the engine failure was due to skipped oil changes after 10,000 miles. The engine may need to be rebuilt or replaced, depending on the damage caused by running without oil.

Your 2018 Hyundai Elantra has a defective rod bearing that's subject to a safety recall, and your car hasn't been repaired yet. This defect makes the vehicle unsafe to drive and has already cost you money in towing fees. The fix will involve having a Hyundai dealer replace the affected rod bearing as part of the recall service.

Your 2018 Elantra is burning through oil quickly and experiencing serious performance problems when you accelerate above 2,000 RPM, including metallic rattling sounds, power loss, and heavy exhaust smoke that sometimes continues after you shut off the engine. You've also noticed rough idle, random stalling, and transmission shifting issues, though no check-engine codes are showing. A $6,000 CVVT repair last year temporarily helped but the problems returned, and your car is now out of warranty. The underlying issue likely involves engine valve timing and fuel system components that need professional diagnosis and repair to restore normal operation.

Your engine is consuming oil much faster than normal — you ran completely out of oil 200 miles before your scheduled oil change, which caused overheating. You've followed Hyundai's recommended oil change specifications since then, but the excessive oil consumption continues. The repair may involve inspecting the engine for internal oil leaks, worn piston rings, or valve seal issues.

Your engine is consuming oil at an abnormal rate, which could cause it to shut off while you're driving if oil levels drop too low. This is a serious issue that needs immediate attention to prevent engine damage or loss of power on the road. The fix will likely involve diagnosing the source of the oil leak or excessive consumption and replacing worn engine components.

Your engine is leaking oil from the pistons, similar to issues found in recalled Hyundai engines. This type of leak can cause oil loss over time, potentially leading to engine damage if not addressed. Your mechanic will need to inspect the piston seals and likely replace them to stop the leak.

We purchased the car 4 or 5 months for my son who works for his God Mom as her assistant at a nonprofit. The car ran great until without no warning lights from instrument panel just left him sit in the middle of a busy road. The mechanic found a camshaft pin stuck in the camshaft & the timing jump 2 teeth. Repairs= Oxygen Sensor, Timing Component & Exhaust Camshaft total $3,557. Some 2018 are being recalled for the same issue but not his VIN.

I purchased a 2018 Hyundai Elantra on April 3, 2024, from CarMax. At the time of purchase, I was not told about any recalls. Later, I discovered that my vehicle is covered by Hyundai Service Campaign 993 (Anti-Theft Software Upgrade), issued February 13, 2023, which addressed the lack of an immobilizer in 2011–2022 Hyundai vehicles. On May 29, 2025, my vehicle was stolen due to this defect. When it was recovered, it had a blown engine and was completely inoperable. Hyundai acknowledges that my VIN is included in the recall, but they have only offered to install the software update now. That does not remedy the damages caused by the theft and resulting engine failure. CarMax has denied responsibility, claiming they were not aware of the recall. I am now left with a financed vehicle that is not drivable and has lost significant value due to Hyundai’s defective design.

Burning oil. Multiple misfires. Replacing spark plugs more often than should have to. Engine knocking.

The crankshaft needed replacement The oil pump broke at 107,000 miles

I started my vehicle and it was running sluggish and low idle. I had an engine light and when I tried to drive there was a clanking sound. When I had the engine light tested I received the following codes: P0017 - Crankshaft Position Correlation Bank 1 Sensor B, P0303 - Cylinder 3 Misfire Detected, P0302 - Cylinder 2 Misfire Detected, P0301, P0014 - Exhaust Camshaft Position Timing - Over Advanced (Bank 1), P0030 H02S Heater Control Circuit (Bank 1, Sensor 1) I had it towed to my nearest Hyundai dealer in Tacoma, WA. After they did a diagnostic they said that they would have to replace the engine due to a shearing of a pin, leading to the belt jumping and causing issues. I am the only owner of the vehicle, I have had all my oil changes on time and my vehicle is 137,000 miles. This should not be happening in a vehicle with such low mileage. In reading online, this is an issue that Hyundai is aware of but not concerned with. There was no warning beforehand. This could have led to my engine stalling on the the freeway at freeway speeds and thus could have caused a great accident and bodily harm to myself and others. Hyundai has denied responsibility but knows this is an ongoing issue with it's poorly manufactured engines. I was not informed of all the problems of Hyundai vehicles before I purchased mine. I have yet to receive help from Hyundai Customer Service or the Hyundai Dealer.

Burning oil internally. Adding 1 quart about every 1000 miles.

Formal Complaint: Engine Failure in 2018 Hyundai Elantra To Whom It May Concern, I am submitting this formal complaint regarding a severe and unresolved issue with my 2018 Hyundai Elantra, which has been problematic since the time of purchase and has now suffered a complete engine failure. Despite regular maintenance and responsible use, the vehicle has proven to be unreliable and unsafe. 1. Nature of the Problem The most recent and critical issue involves total engine failure. On May 12, 2025, I brought the vehicle to North Freeway Hyundai due to the car not starting. Their official diagnostic report revealed that the engine needs to be replaced. Additionally, the inspection showed issues with the transmission cooler coolant lines leaking, EFI system, camshaft exhaust, radiator hoses, and the battery. These problems affect essential systems that are critical to both the performance and safety of the vehicle. 2. History of the Problem From the beginning, the vehicle experienced a series of mechanical issues. These included engine stalling, warning indicator lights, rough idling, and decreased fuel efficiency. I consistently took the car in for service and maintenance, yet the problems worsened. In the days leading up to the failure, the vehicle had trouble starting, made abnormal noises, and eventually stopped working entirely. 3. Risk to Safety The failure of the vehicle to start without warning has placed me in unsafe and potentially dangerous situations, including being stranded in public places. The risk of the car stalling during operation could have endangered not only my safety but also the safety of other road users. This is a serious safety concern that should not be ignored. 4. Diagnosis Confirmation The diagnosis by North Freeway Hyundai confirmed that the engine failure is complete and that replacement is necessary. The service notes also included a recall campaign (24-01-009H-1) for anti-theft software and decals. These issues further demonstrate

I am filing this Vehicle Owner's Questionnaire (VOQ) regarding critical safety defects in my 2018 Hyundai Elantra related to: - Recurrent ignition coil pack failures (3 replacements since 10/2018) - Engine stalling at low speeds (6 incidents since 10/2018) - Dealer refusal to apply TSB 20-01-008H ECM update despite matching symptoms Technical Background: Hyundai Technical Service Bulletin 20-01-008H (February 2020) specifically addresses: - Misfire detection logic flaws in 2018-2019 Elantra 2.0L engines - Required ECM software update (ROM ID AD8SP2AS673D) - Updated ignition coils (P/N 27300-2E601) Safety Incidents: 2025: Stalling event at 25 mph approaching traffic light (no crash) 2021, 2023, 2024: Multiple misfire codes (P0300-P0304) with check engine light Dealer Interactions: - Round Rock Hyundai refused ECM update on 05/2025 claiming "VIN not in campaign" - Round Rock Hyundai refused coil replacements on 05/2025 claiming not under warranty - Service advisor acknowledged stalling/coil failure pattern matches TSB criteria Formal Requests: - Investigate Hyundai's VIN filtering for TSB 20-01-008H applicability Require Hyundai to: - Perform ECM software update per TSB specifications - Replace all coils with updated P/N 27300-2E601 - Reimburse previous coil replacement costs $1700 (6 coils over 7 years) - Open recall investigation for 2018 Elantra ignition systems Attachments available upon request. I authorize NHTSA to share my contact information with Hyundai Motor America. This defect creates unreasonable safety risks through sudden power loss and compromised vehicle control.

Check engine light came on , car was sluggish and stalled on highway , was able to glide over to the side . Would not start . This is the 4th time this happened to this vehicle , in the past I was able to put in neutral and restart . They fixed it 3 times but they are now Hyundai is now saying it needs a new engine.

Check engine light came on, took to mechanic. Diagnostics showed pistons performing at half of the required psi. Engine replacement required at a cost of nearly $9,000. The vehicle only has 74k miles.

Engine shuts off suddenly in the middle of road; several times on the way back home while my wife was driving with no warnings. Very unsafe if another car is behind. She cranked over and it went, but it happend again in an intersection after a stop sign, fortunately no cars were coming. No shows WARNING LAMPS, check engine light on or diagnostic trouble codes, but engine next day started making noises like knocking or ticking. Car is only 140k miles. Symptoms appeared 2 days ago 2/23/25

My 2018 Hyundai Elantra had an oil pressure light on and the timing chain was slapping the side of the engine. I changed the timing chain, oil pump, oil sending unit, and oil filter. When I dropped the oil pan, there was paint chips in the pan. Who paints the inside of an oil pan? I removed the oil pick up tube and discovered the inlet screen was covered with these paint chips. I cleaned the inlet and reinstalled the tube and oil pan. I no longer have the low-pressure issue. This is causing engines to have major issues and / or making them seize up. Now, I believe there are a lot of Hyundai and Kia vehicles in the junk yards today because of this very issue. Majority of people will not take their engine apart to find out why it stopped working. They ether stop paying on them or junk them. As you can see in the attached photos, you will notice the pain in the pan, inside the oil pick-up tube, how much of the screen was exposed. This is a major fault of the manufacturer and Hyundai and Kia should be held responsible for the repair.

My car lost power on a busy highway which almost caused a tractor trailer to rear end me. I had the car towed and the mechanic said the engine is bad because of issues with this engine losing oil quickly and there is no recall on it but on other years. Now I have no car but still owe money on it and can’t get to work. Luckily i wasn’t hit by the tractor trailer but this should be a recall and i should be able to get it fixed without being out thousands of dollars.

Engine seized up at 142K miles. Had regular oil changes and maintenance. Connecting rod crank shaft end / bearing blew apart and seized engine.

Driving on the freeway around 55 MPH the engine would stall. Scared the heck out of me this started around 130000 miles on the car. Fixed a sensor still didn’t fixed the issue did an oil change that seemed to fixed the stalling. Low oil light never came on. So for years after that when the car stalled I did and oil. change. Finally at 183000 the engine gave out. Did my research found out Hyundai knew there was a problem with the engines. On 2019 and 2020 Elantra engines have been recall. 2018 not enough complaints on th engine. There was a knock sensor recall on the car. I never got a recall notice. Sent an email to Hyundai saw that the email was received but no one has responded this was a month ago. Taking my Hyundai to the dealership to see if they’ll do anything for me. My miles are all highway miles. Engine should have lasted longer. Very disappointed that Hyundai has known that the 2.0 liter engines since 2015 has had issue over 500000 cars are effected with this issue but Hyundai doesn’t want to fix the issue. It’ll all about the money for the company producing defected cars even Kia have the same issue.

The engine experienced rod bearing failure while driving the vehicle. The vehicle died on the road in a high traffic area, which put me and others at risk as they tried to maneuver around the car and as I tried to get the car off the road. The car had just had the oil changed, and had consistent/regular maintenance. No warning lamps lit up on the dashboard at all until the engine died, at which point the oil indicator lit up. The vehicle has been taken to Hyundai and confirmed to have rod bearing failure, a known issue with engines in Hyundais and Kias.

See attached document for complaint.

Hyundai engine from 2017 and up are not good engines my experience on my 2018 Hyundai engine is the same as what I see 90 percent of Hyundai owners are having regardless of the year there all the same engines it’s burning oil it’s making ticking noise with regular maintenance no neglecting y’all have to understand there are so many ways and possibilities of engine premature failure then it is Maintaining the engine during buliding these engines you have metal particles over tighten the heads the blocks not seating the piston rings properly dirt that can clog up the oil galleys to luberciate the moving parts poor design there’s so many ways to say it’s not a manufacturer defect and they tell us change the oil ok how come I’m having more issues and hearing issues from a engine then the transmission you do more maintenance on a engine then a transmission these transmission are not the problem you are hearing engine problems even when people do maintenance so sounds to me the manufacturer should recall 2018 models as well it’s beyond me for you to skip a year and say that model isn’t having issues it’s definitely happening in 2018 models as well the transmission is fine I never heard or experience and transmission failure in these cars when there are a lot of people complaining about a similar issue in the same model car at that point it has to be a issue manufacturer aspect we’re told as consumers and vehicle owners change your oil that’s it there’s no way I should be dealing with major issues on a simple solution you don’t hear Toyotas breaking down Hondas breaking down with regular maintenance oil changes you hear Hyundais engine all across the board and it is a safety issue going on with these cars not just 2017 2018 engine it’s ticking because lack of lubercation the manufacturer could have left metal particles in the engine could have warped heads over tighten bolts dirt that was already in those engines a bunch of causes poor design I really hope they replace it

May 24 2024, while driving on Interstate95 at approx 70mph, I experienced catastrophic engine failure, with metal shards and screws shooting out, oil spewing, and smoke billowing everywhere. Loss of control of vehicle and nearly hit by passersby while trying to guide vehicle to swale. There were absolutely no warning lights or signals, and vehicle had just been serviced at Hyundai dealership at 77k miles (odometer reading 81k at time of incident). Independent mechanic diagnosed engine failure, hole in block, and provided attached photos. Vehicle was towed to Wallace Hyundai, in Ft Pierce, where it awaits dealer mechanical inspection.

I am losing engine oil all the time to the point the car engine shut off My engine start losing oil after 2000 miles 1000 miles before oil change [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2018 Hyundai Elantra. The contact stated that while driving at 70 MPH, the vehicle made an abnormally loud popping sound. Two other drivers alerted the contact that flames were coming from underneath the vehicle. The contact checked the rearview mirror and noticed smoke coming from the vehicle's rear end. The steering wheel then seized, and the vehicle lost motive power. The check engine and several other unknown warning lights were illuminated. The contact pulled over to the side of the road and exited the vehicle. No injuries were sustained, and no medical attention was received. The flames extinguished themselves. There were no police or fire department reports filed. The vehicle was towed to the dealer, where it was diagnosed with a seized crankshaft and determined that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 224,809.

AT LESS THAN 62,000 MILES THE ENGINE NO LONGER HAS PRESSURE AND THE CAR IS INOPERABLE. VEHICLE BEGAN STALLING 1 WEEK PRIOR TO CAR BECOMING INOPERABLE.

Having issues in several instances the past few months , where my car abruptly stalled in highway traffic, again less than a month later while at a stop light, traffic built up, I became nervous an scared, finally after turning my car off an on several times I was able to get my car to stop stalling an drive away. Third instance has been the ammount of oil consumption my car is needing, I’ve noticed an increase use of oil for my car I use as a daily driver just commuting to a from work, an a clicking/knocking sound, other instances was my car accelerated at high rates of speed on the freeway on its own. Only after smash the break button was I able to disengage the throttle. An now just recently my car is using up more an more oil an has developed a hard knock in the engine. Similar to other models that have been recalled for the same reason. Reading online has made it clear thousands an thousands of other people are having issues just like mine around the same mileage as me an other models that have had the problems

Unfortunately I bought a Hyundai Elantra sport brand new in 2018 i’ve kept the maintenance even to this day the car currently at 147,300miles. However I started having issues at 30,000 miles check engine would go on the car with shake and stall and miss fires would occur frequently. Every time I took it to the dealer they reset the computer but never made an actual note of what was going on with the car. That dealership that I took it at the time was Universal Hyundai in Orlando, Florida. So now that I have 147,300 miles the same misfires are now catastrophic failures on the same cylinders, to add insult to injury I took it to a different dealer located in Sanford Fl so they can try to get willful engine replacement, and my claim was denied because I was out of warranty and over the mileage, the dealership new that I was both over mileage and out of warranty the second I brought the car in somehow I still get charged $213. It seems like no one can do anything about it cause Hyundai America made there decision to deny my claim. These cars are straight up trash my buddies Kia similar situation has made it to 150,000 before he had total engine failure engine seized up on him. To make things worse I’m making payments on a car that’s needs an engine replaced. I’m never buying a car from Hyundai ever again they’re straight garbage and now I have to purchase another vehicle. Thanks Hyundai America for making unreliable vehicles and then taking my $213 to just deny my claim despite having a perfect maintenance record. I hope people read this and realize what crooks you guys are. Side note Hyundai America refused to help, however when I threatened to contact the BBB to complaint about there product the customer service agent Ciani mentioned they will open up case as to why I’m putting a complaint to the BBB, I don’t know what the outcome of this will be but it’s irrelevant I wouldn’t take a free Hyundai even if it was given to me! You lost another customer for life!!!

Our hyundai elantra 2018 car started with a knocking sound while we were driving and it got worse our of nowhere when we accelerated and suddenly did this throttling sound with a pop. The battery light came on, the engine light came on and suddenly our car engine turned off and we were able to go on the side of the street we were on. Fumes were coming out of the hood and oil began to leak. The car was not able to be turned on to move it. We have towed it to our home, our local mechanic told us it was the engine. It has 135,000 miles on it. We got it from the dealership about 5 years ago and had not had issues until suddenly our engine blew!

I was at work when my wife contacted me and informed me that the car has started to make a ticking noise (shared car mind you) upon acceleration and start up. This all started on 1/4/2024. Well I checked the oil level and it was a on the line of being on the low side so I changed the oil as I needed to anyways and topped it off. I went to start to the car and ticking again, well I called around as I'm not going to ignore any sort of noise and was able to get a lcoal mechinic to look at it the next day as my local Hyundai dealership didn't have any opening until Saturday (1/6/2024). The next day I'm on my way to drop the car off to see where the sound could be coming from and the car shuts off. There were no warning lights or anything of that matter until the car shut off. I had to pull off into a street off the road. We get the car towed to the mechanic and he gets back to me the next day and states the car had low oil and that is why the engine failed. Hyundai shame on you all for knowingly putting a terrible engine into your products and for also at least not giving us the time by having poor sensors.

I was driving on the highway early in the morning and my car would not accelerate and slowed down until stopped running. Then the check engine, check oil, and battery light came on after. I tried to restart the car and it would not do anything. I popped the hood to check the oil and there was no oil in the engine. My car was not due for any oil change until another 1000 miles. No notification for low oil. No sounds , no smoke, nothing I had to tow it to my house.

I noticed around 100,000 miles that my car was going through oil when I heard a ticking in the engine. I pulled over and checked and there was no oil on the dipstick. No warning lights or nothing. I just kept adding oil after that and thinking that I will never buy another Hyundai again but never thinking my engine would fail full of oil. In June of 2023 my car lost power just as I got off the freeway. Thankfully it happened just as I got out of rush hour traffic otherwise it could have caused an accident. I had it towed home and the repair shop said my engine failed. I had it towed to a dealer and they confirmed that the engine failed. After many email and phone discussions with the dealership and Hyundai, they said they would cover 50% and then 70% of the repairs. The repair shop in town said this was common in Hyundai's and after checking online I found out that this has been an issue for 6 years before my car was built so Hyundai KNOWINGLY put a defective motor in my car. I have 149,000 miles on it but I still had over a year left to pay on it. just to get it moving I accepted the 70% and 9/27/23 I received an email saying it was done. The same day I received another email saying that they were wrong and it needed another part but should be ready early October. 3 months later I still have no car. I had to use an old truck I have that gets half the mpg. I've been paying insurance and payments on a car I don't have and don't want back. A page on Facebook, Engine Failure Kia/Hyundai describes many people's frustration with the same issue. When most get their car back, the engine fails again. I drive 110 miles a day just for work and its freeway 95% of the drive. If I have to drive in rush hour and my engine fails again, it could be disastrous. I want the dealer to buy my car back with compensation for lost money. I should not be forced to drive something that is a proven hazard on the road. I can mail all pertaining documents if needed. I can't scan them.

Engine completely out of oil. Only owned the car for 9 months. No warning lights no check engine lights just completely stalled on the freeway. Now has a very loud engine knock and needs a new engine

MY 2018 HYUNDAI ELANTRA SHUTS OFF WHILE DRIVING. THE ENGINE AND OIL LIGHTS COME ON AND THE CAR WILL SHUT OFF ANYWHERE WHILE I AM DRIVING AS OF APRIL 02, 2023. I HAD TAKEN MY 2018 HYUNDAI ELANTRA TO THE DEALER TO HAVE THE CRANK SENSOR REPLACED AND THEY COMPLETED THE REPLACEMEMT TODAY, WEDNESDAY, AUGUST 09, 2023. NOW MY 2018 HYUNDAI SHUTS OFF MORE OFTEN THAN BEFORE. I WAS TOLD BY THE HYUNDAI CORPORATION OFFICE TO TAKE MY VEHICLE BACK TO THE DEALER AND INFORM THEM THAT MY 2018 HYUNDAI ELANTRA IS SHUTTING OFF MORE FEQUENTLY THAN BEFORE....AS OF TODAY, WEDNESDAY, AUGUST 09, 2023.

Knocking coming from the engine, OIL in the engine, Oil pressure light came on. Was looked at by two private mechanics and the dealership and was told the engine was faulty and not to drive it. The engine needed to be replaced. Was denied replacement by corporate since it just passed the warranty and was told to go to the BBB if I didn’t like it.

I noticed around 97k miles that car just died as I turned left out of a parking lot at low speed. Thought nothing of it at first maybe I hit the keys with my knee. Then it happened again at 101k and recurred consistantly always within 1000 miles of an oil change at the scheduled interval in the manual. Then at 117k it did it again but when I started the car it developed a loud knock. I got the car home and took it to my mechanic and they said that the engine would need replaced. This is incredibly dangerous as it happens while traveling at speed and you lose control of power steering and acceleration.

I purchased this car as a used car at CarMax in July 2022 and it drove fine for about 10,000 miles, but starting in February 2023, my engine started to misfire. The first misfire happened when I started my car. I was told by my local mechanic that I needed a new engine after a compression test was run. My engine misfired a 2nd time while I was merging on the highway and a third time while I was starting my car. I only have 68,975 original miles on my car. The first 2 misfires illuminated the check engine light and the third misfire illuminated the check engine light, the battery light and oil pressure light, however my mechanic didn't find any codes with my third misfire. My car regularly rough idles and has a delay when I accelerate as well.

ENGINE SHUT DOWN AND INOPERABLE. POSSESSION OF CAR LESS THAN 2 YEARS, DRIVEN TO COLLEGE, WORK, ETC.

The contact owns a 2018 Hyundai Elantra. The contact stated that while operating the vehicle, smoke and an oil leak coming from the engine compartment. The vehicle was towed to the local mechanic who diagnosed that the engine was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer and local dealer were notified of the failure, but no assistance was provided. The failure mileage was 93,000.

Engine internal parts failure causing the car the to become a danger to the occupants of the vehicle and to others on the road the 1.6 litter gdi Engine is known for having Engine problems but little is said about the 2018 tgdi 1.6 litter in the hyundai elantra sport having the same issues. I thought I was getting a safe car for my wife and my children I guess I was wrong. We are second owners of the car we bought it from carmax and we got the max care extended warranty they knew hyundai had engine problems sold us the car without revealing any information about the problems and the when the engine problems accrued they along with another actual hyundai dealer have done everything in their power not to help so I'm stuck paying $16,000 for a car that does not run. I am extremely disappointed in their willingness to accept any responsibility for the faulty engine they $3,600 out of my pocket just for them to check out the engine to see if the would replace it which would not be reimbursed. That is a lot of money just to throw in and hope they'll fix it if not a new motor is $10,000. We don't have $13,600 just laying around. This engine issue has to be addressed I'm sure there are other people having this issue. Thank you for your time

Engine is defective and using excessive amounts of oil and will eventually fail or seize resulting in catastrophic failure or leaving customer with a lemon that they still own on. Hyundai hasn't issued a recall for this make and model but should have. As a result, been forced to constantly check the oil levels, and oil must be added to the engine more frequently than even the owner’s manuals recommend. MALFUNCTION INDICATOR LAMP (ENGINE LIGHT) suddenly came on at 123K miles. When engine light appeared, customer checked oil level which revealed low/no oil. Engine oil pressure warning light fails to come on dashboard display. Oil change had been scheduled months in advance but not due until about another 770 miles. Customers must suffer through extremely long wait times often 3-4 months later for service appointment at dealership even just for an oil change. The customer also expected to leave vehicle for up to a week or longer just for a diagnosis meanwhile footing the cost to rent a vehicle. Customer having to service vehicle elsewhere for diagnostic only for code to clear temporarily before reappearing. Major issues cannot be addressed timely dealerships, leaving customer with one of two options: drive the car until it fails or foot the bill for a $10,000 engine replacement outside of any Hyundai dealership. Engine should be recalled & replaced under warranty.

I fill up my oil at regular service intervals. When i drive my car after 3500 miles if i turn the engine stalls. This is dangerous due to loss of power. This has happened multiple times.

ENGINE COMPLETLY STALLED WHILE DRIVING, WAS PARKING IN A PARKING GARAGE, AND WAS DRIVING UP ON AN INCLINE TO PARK AND MY CAR JUST STALLED AND ALL WARNING LIGHTS CAME ON. NO WARNING LIGHTS WERE PRESENT PRIOR TO, AND ALL POWER WAS STILL ON. I WAS STUCK IN THE MIDDLE OF THE LANE, BLOCKING CARS IN. I WAS ABLE TO TURN THE CAR OFF AND RESTART IT AND IT STARTED UP WITH NO WARNING LIGHTS AND AS IF NOTHING JUST HAPPENED. I DO NOT FEEL SAFE DRIVING THIS CAR AND WILL BE HAVING IT INSPECTED IMMEDIATELY

The contact owns a 2018 Hyundai Elantra. The contact stated that while her son was driving at an undisclosed speed, there was a loud sound coming from underneath the vehicle with the check engine warning light illuminated. Additionally, there was smoke coming from the front end of the vehicle. Another driver alerted her son that there was a flash of flame coming from underneath the vehicle. The vehicle was towed to the dealer where it was determined that the engine needed to be replaced. The vehicle was not repaired and remained at the dealer. The manufacturer was made aware of the failure and a case was opened. The manufacturer informed her that the vehicle was out of warranty and offered to cover 60% of the repair cost. The failure mileage was approximately 70,000.

While driving lost acceleration, car stalled multiple times. No dash light on at all when this happens. Having to add oil to my engine between oil changes.

The contact owns a 2018 Hyundai Elantra. The contact stated while driving 35 MPH, she depressed the accelerator pedal and the vehicle began to jerk and shake from the front end. The vehicle also hesitated prior to responding to the accelerator pedal being depressed. The contact stated no warning light was illuminated. The failure had become a recurring failure. The contact had taken the vehicle to a local dealer however, the vehicle was not diagnosed or repaired. The manufacturer had been informed of the failure. The failure mileage was approximately 38,000.

While driving, the acceleration stopped working and loud clanging noises were heard in the engine. There were no warning lights, nothing. I was driving on a busy road and the lack of acceleration created a major safety hazard for me and the vehicles around me. I eventually pulled over and restarted the car. It happened three more times on the way home. I got the car to my local mechanic and he said that it was the engine and it needed to be replaced. He saw this many times before on this model and told me to bring it to the dealer. I had the car towed to the Hyundai dealer/service center in Milford, Connecticut. I am waiting for them to look at it. I know that this has happened to many others with a 2018 Elantra and I am very upset that the car failed.

The contact owns a 2018 Hyundai Elantra. The contact stated while driving approximately 35 MPH, the vehicle stalled and lost motive power. The check engine warning light illuminated. The vehicle was towed to the dealer. The vehicle was not diagnosed; however, the contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA Campaign Number: 21V301000 (Engine). The manufacturer was notified of the failure. The approximate failure mileage was 106,000.

My husband was driving the car when all of a sudden it stalled during morning rush hour traffic. As traffic zipped by us he quickly put the car in neutral and started the car. When it turned back on the car made a loud knocking noise. He proceeded to drive back home where it stalled one more time. When he was getting close to the house the knocking noise got louder. He then called our local Hyundai dealership and they stated that they would not inspect the car for well over a week. We then had a mechanic come over the house to take a look at it. The mechanic stated that we didn’t have any oil left in the engine. Even though we had an oil change three months, the engine had burned through all of the oil. We bought oil to fill the engine but chose not to drive the car anymore out of fear for our safety and of messing up the engine any further. The car has not been inspected yet by the manufacturer, but we are speaking to Hyundai Consumer Affairs about it. Also, before the incident and at the time of, there was no lights or warnings for the engine or that it was missing oil.

Multiple events of engine shutoff while driving. This results in loss of power braking, power steering and any acceleration. This occurs both at highway and non-highway speeds. This is obviously a safety concern, as, until the engine is restarted, there is difficulty in safely manuevering the vehicle. The engine may or may not be immediately able to restart. This occurs with the vehicle in gear during normal driving conditions (IE, driving at a steady speed on flat road) This is accompanied by multiple CEL faults relating to CCV timing, engine misfire, etc. This was a known issue in prior engine revision (Theta 2.0L), and appears to be subject to a recall of the same engine (Nu 2.0L) in other models. This vehicle was taken to the local dealer and confirmed to need an engine replacement with a similar failure mechanism as the Theta 2.0L (failed lubrication of pistons resulting in premature wear leading to early failure resulting in misfire/"piston slap")

I just purchased this car on may 10 2022 after only having it a week engine light came on.startes to loose power and shake really bad. Took to shop replaced spark plugs and some other .think that was just a week ago .now while driving to day car just cuts of now don't wants to start.no waring lights just died .wondering do I have a lemon.

I have been having issues with my car since November 2021. My car would not go over 35 miles per hour, if I let my car sit for a couple of days I would have to jump my car. My check engine light came on and then 10 minutes later went off. So I finally got it in to the Hyundai dealership after months of them not having enough mechanics. So they did a multipoint inspection and came back saying the catalytic converter needed to be replaced even though no codes in the system. So I was coming back from Florida when my car stopped accelerating on the highway and my check engine light. So I had to take the long way home which means no highways and anytime I stopped I had to throw my hazards on until it would pick up any speed. I took it to Jiffy Lube in SC and that's when my car was reading 8 different misfire codes so I did my tune up with them and that is when I was told that my engine valve was cracked and dumping oil on my spark plugs and coil pack. Yesterday my engine valve replaced and another set of spark plugs in 2 weeks and it is still reading misfire codes and still no change in acceleration. I have only had my car 4 years and my catalytic converter should not be gone. I have not really moved my car in 10 months because my husband passed and I had 2 surgeries. My family can't take another loss if something happens to me because of this car.

At slow speeds car just shuts off engine. Starts back up but does it constantly. Also the engine lifters are starting to make noises like a clacking someone said it was a defective motor.

The contact owns a 2018 Hyundai Elantra. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power. The vehicle was taken to the dealer, and the dealer replaced several unknown sensors; however, the failure recurred. The vehicle was taken back to the dealer and it was diagnosed that the engine needed to be replaced due to oil clogging the valves. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 64,644.

Engine would randomly idle mild to very rough when started and would sometimes correct and sometimes not correct while driving. This would turn on the check engine light for a misfire on cylinder 4. All ignition coils were replaced, and same code would happen. Hyundai was aware of this being a widespread issue and did a software update (Tech Bulletin 90C042R1). The problem continued, but seemed the check engine light would not come on as soon as before the software upgrade. Took back to dealership and they said the ignition coils would need to be Hyundai brand, change cylinder 4 to OEM and still having the issue. Engine also burns about 1 quart of oil every 7000 miles and often has a rough idle, with very rough idle periodically. I feel this would put myself and others on the road in danger if the engine were to fail while driving due to the ongoing damage rough idling appears to be causing to the engine.

The contact owns a 2018 Hyundai Elantra. The contact stated that after starting the vehicle, the vehicle began to shake and vibrate and the check engine warning light illuminated. The vehicle was taken to the dealer who diagnosed that two cylinders were misfiring. No further information was available. The vehicle was not repaired. The manufacturer was notified of the failure but no assistance was offered. The failure mileage was 55,000.

The contact owns a 2018 Hyundai Elantra. The contact stated that while his daughter was driving at an undisclosed speed, the vehicle stalled. While driving and turning the steering wheel was firm. Additionally, the vehicle was consuming an excessive amount of oil. The driver added oil to the engine. There was an abnormal sound detected. There were no warning lights illuminated. The contact called the local dealer and informed them to schedule an appointment. The vehicle was not diagnosed or repaired. The manufacturer was contacted but no further assistance was provided. The approximate failure mileage was unknown.

The contact owns a 2018 Hyundai Elantra. The contact stated while driving approximately 30 MPH, the vehicle stalled. The contact pulled over but was unable to restart the vehicle. The contact stated there was no warning light illuminated. The vehicle was towed to an independent mechanic where it was diagnosed with needing the engine replaced. The vehicle was not repaired. The vehicle was then towed to a local dealer and was awaiting diagnostic testing. The manufacturer was not informed of the failure. The failure mileage was approximately 110,000.

On 10/29/2021 I was driving approx 40 miles per hour when my car engine shut off with no warning and almost caused an accident with my kids in the car. I had it towed to hyundai after the care refused to restart. No check engine light anything. Was told my engine failed by the dealership I have 72000 miles on the car. This whole incident has been a nightmare

The contact owns a 2018 Hyundai Elantra. The contact stated while driving 35 mph, when the vehicle stalled. The contact stated the oil and the low tire warning lights were illuminated. The contact was able to restart the ignition and drive to an independent mechanic and had oil maintenance completed. The contact stated on 10/31/2021 while driving 35 mph, she started to smell smoke and saw smoke exiting the hood of the vehicle. The contact stated the oil, the low tire, and the check engine warning lights were illuminated. The contact was able to park the vehicle near a parking lot. The contact stated her boyfriend was able to extinguish the fire with a fire extinguisher from a near restaurant, but the fire continue to expand. The fire department was able to extinguish the rest of the fire. A fire report was filed. The contact stated no one was injured nor seek medical attention. The vehicle was not drivable. The vehicle was towed to a towing lot. The vehicle was not diagnosed or repaired. A dealer was not contacted. The manufacturer had not been informed of the failure. The failure mileage was approximately 77,000.

The contact owns a 2018 Hyundai Elantra. The contact had a remote start system installed on the vehicle; however, the vehicle would inadvertently start. The headlights would also activate independently. The vehicle was taken on four separate occasions to the local dealer and was diagnosed that the remote was sticking. The contact was provided new remotes, remote start module, and the mechanic cleared the codes. The vehicle was repaired however, the failure recurred. The manufacturer was notified of the failure however, no further assistance was provided. The failure mileage was approximately 13,000.

The contact owns a 2018 Hyundai Elantra. The contact stated while driving 60 mph, the check engine warning light illuminated and the vehicle inadvertently shuddered and stalled. The contact stated he was able to veer to the side of the road and restarted the vehicle. The vehicle was taken to the dealer who diagnosed that the engine coil pack needed to be replaced. The contact stated that the vehicle was repaired however, the failure persisted while driving. The vehicle was taken back to the same dealer who diagnosed that the engine coil pack needed to be replaced. The vehicle was repaired. The contact stated that the failure reoccurred while driving and the vehicle was taken to the same dealer who diagnosed that the engine coil pack needed to be replaced. The manufacturer was made aware of the failure and a case was opened. The contact was still awaiting a call back from the manufacturer. The vehicle was not yet repaired. The approximate failure mileage was 30,000.

Engine Seized Completely On 6 /20/2021 Car Was Only highway Driven and has had Regula Oil changes Using Quaker State Synthetic Oil As Is Recommended by the Automaker We still owe $10 K on this Car Its Outragous that Hyundai Has Had So Many Of these Seize But Yet It Keeps Going On We Have Had a Licensed Owner /Mechanic Look the car over and Will Provide A Letter We Fully Expect This Engine Be Replaced At Hyundai's FULL EXPENCE

While driving the vehicle this past January, I experienced a brief “clunking” noise in the engine, and the car stalled. The check engine came on briefly and then disappeared. The code identified was a “faulty crankshaft” code. I made an appointment with the dealership to take it in to be inspected, but later that day my son was driving to pick me up from work and the vehicle literally died in the middle of an intersection. No warning, all lights came on in the vehicle, the electrical system terminated, and the vehicle died. I had to have it towed to the nearest garage, which was a Pep Boys, and they diagnosed the problem as an alternator and battery, serpentine also. So. 1300 dollars worth of work later…. Turns out the car has an engine issue.

TL* THE CONTACT OWNS A 2018 HYUNDAI ELANTRA. THE CONTACT STATED WHILE DRIVING 45 MPH, THE VEHICLE STARTED LOSS MOTIVE POWER WITH THE CHECK ENGINE WARNING LIGHT ILLUMINATED. THE VEHICLE WAS HESITANT TO RESPOND TO THE ACCELERATOR PEDAL BEING DEPRESSED. THE VEHICLE WAS TAKEN TO THE LOCAL DEALER GENE MESSER HYUNDAI (4025 W. LOOP 289, LUBBOCK, TX 79407, (806) 785-7853) WHERE IT WAS DIAGNOSED WITH NEEDING THE ENGINE TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS INFORMED OF THE FAILURE. THE MANUFACTURER STATED THAT THERE WAS NO MAINTENANCE RECORDS FOR THE VEHICLE AND DECLINED TO OFFER FURTHER ASSISTANCE. THE FAILURE MILEAGE WAS APPROXIMATELY 18,559.

MY 2018 ELENTRA VALUE EDITION STARTED KNOCKING IN AUGUST OF 2018. I CALLED THE DEALERSHIP IN CHILLICOTHE OH AND THEY TOLD ME IT WAS FINE TO DRIVE AND TO BRING IT IN THE FOLLOWING MONDAY. THEY SAID I SHOULD PLAN TO WAIT WHILE THEY LOOKED AT IT AND THAT I WOULD BE DRIVING IT HOME THAT DAY.. I DROVE ABOUT 20 MILES AND THE ENGINE MADE A LOUD NOISE AND DIED. THEY NEVER TOLD ME WHAT CAUSED THE FAILURE BUT THERE WAS OIL AND CHUNKS OF ALUMINUM ALL OVER THE ROAD. THEY REPLACED THE ENGINE UNDER THE WARRANTY. THE CAR HAD 33,000 MILES AT THAT TIME. THEN ON DECEMBER 23 OF 2020 MY ENGINE STARTED MAKING THE SAME EXACT NOISE. THE CAR IS NOW OUT OF WARRANTY WITH 144,000 MILES ON IT. I REMOVED THE OIL PAN TO FIND THE PROBLEM. IT WAS THE NUMBER 3 CYLINDER. THE CONNECTING ROD BEARING WAS BAD. I CLEANED THE JOURNAL ON THE CRANKSHAFT AND MEASURED IT WITH PLASTIGAUGE. IT WAS 0.001" OVER THE TOLERANCE. I INSTALLED NEW BEARING ON ALL FOUR RODS IN HOPES THAT 0.001" OUT OF TOLERANCE WOULDN'T BE TO MUCH. EVERY BEARING ON THE ROD SIDE WAS WORN OUT AND THE COATING GONE. THE BEARINGS ON THE BOTTOM "CAP" SIDE WERE IN DECENT SHAPE EXCEPT FOR THE NUMBER 3 CYLINDER WHICH WAS DESTROYED. AFTER THE ENGINE HAD STARTED AND I HAD DROVE FOR AROUND 5 MILES IT STARTED KNOCKING AGAIN. THE JOURNAL ON THE CRANKSHAFT IS TO WORN FOR THE BEARING TO WORK. I HAVE AN ENGINE ORDERED AND I AM REPLACING IT MYSELF. I HAVE SEVERAL YEARS OF SCHOOLING IN AUTO MECHANICS AND HAVE GROWN UP IN A GARAGE, I UNDERSTAND THE IMPORTANCE OF MAINTENANCE AND NEVER MISSED ANY ON MY CAR. IT HAD EVERY OIL CHANGE WITH SYNTHETIC OIL, OIL FILTER CHANGED EVERY TIME, FLUID LEVELS WERE CHECKED ON A REGULAR BASIS AS WAS THE AIR FILTER. THE CAR ISN'T DRIVEN HARD, THERE IS NO REASON FOR THE ISSUES I'VE HAD OTHER THEN DEFECTIVE PARTS OR DESIGN OF THE ENGINE IN THIS CAR.

GOT MY OIL CHANGED 9/10/2020 AND IT HAS NOT RAN EVERY SINCE 9/10/20 WANT STAY RUNNING CHECK ENGINE LIGHT ON MAKING A LOUD NOISE I HAVE TO KEEP GIVING IT GAS TO KEEPIT RUNNING. SO. MY STEPDAD WAS LIKE IS THERE ANY OIL IN IT I TOLD HIM I HAD JUST HAD IT CHANGED NOT EVEN MONTH AGO WELL HE CHECK IT AND IT'S 2 AND HALF QUARTS LOW BUT HOW IS THAT IT'S NOT EVEN BEEN RUNNING IN TWO WEEKS AND I HAVE NO LEAKS SMH ENJ

I ATTEMPTED TO START MY CAR AND WHEN I DID IT EVERY LIGHT ON THE DASH WAS LIT UP AND THE GEAR SHIFT WAS STUCK IN PARK. IT HAPPENED ABOUT TWO WEEKS PRIOR AND I WAS ABLE TO TURN THE CAR OFF AND ON A FEW TIMES AND IT WORKED BUT THIS TIME IT DIDN'T SO I HAD TO HAVE IT TOWED TO THE DEALERSHIP. WHEN THE TOW TRUCK DRIVER CAME HE USED SOME SORT OF TOLL HE HAD TO UNLOCK THE GEAR SHIFT WHICH ALLOWED IT TO BE DRIVEABLE. OF COURSE WHEN THE DEALERSHIP LOOKED AT IT THEY WERE UNABLE TO DUPLICATE THE ISSUE BUT THEY FOUND THAT THE IGNITION COIL NEEDED TO BE REPLACED AND DID SO.

THE ENGINE SEIZED WHILE I WAS DRIVING ON THE ROAD AND IT STARTED SMOKING. THE CAR JUST STOPPED AND THE ENGINE COULD NOT BE STARTED AGAIN. THE CAR DID NOT WARNING OF OVER HEATING OR OF THE CAR NEEDING TO BE SERVICED. I BROUGHT THE CAR USED AND IT WAS TWO MONTHS AFTER I MADE THE PURCHASE THAT THIS HAPPENED.

IN NOVEMBER 2018, I TURNED ON MY CAR, AND THE ENTIRE VEHICLE SHOOK VIOLENTLY. I TURNED IT BACK OFF, THEN ON. IT SHOOK AGAIN, AND THE CHECK ENGINE LINE WAS ON. I CALLED THE DEALERSHIP, AND THEY SAID SINCE THE LIGHT WASN'T FLASHING, I COULD DRIVE IT OVER. TURNED IT ON, NO ISSUES, DROVE OVER. THEY READ THE CODE AND REPLACED THE IGNITION COIL. MILEAGE WAS 12,884. THIS MORNING (MAY 2), THE CAR TRIED TO TURN ON, BUT COULDN'T (LIKE A DYING BATTERY). OIL, ENGINE, AND BATTERY LIGHTS ALL CAME ON. WAITED A FEW MINUTES, TRIED AGAIN, SAME ISSUE. THE THIRD TIME, IT FINALLY STARTED, BUT SHOOK VIOLENTLY FOR A COUPLE SECONDS. NO LIGHTS ILLUMINATED. CALLED THE DEALER, THEY SAID TO DRIVE IT OVER. THEY ARE UNABLE TO REPLICATE THE PROBLEM, AND SAID IT CAN'T POSSIBLY BE THE IGNITION COIL, AND CAN'T DO ANYTHING FOR ME. THE CAR CURRENTLY HAS JUST OVER 15,000 MILES. ALL MAINTENANCE HAS BEEN DONE BY THE DEALERSHIP PER THE SCHEDULE. I USED THE CAR THE EVENING OF MAY 1 WITH NO ISSUES, AS WELL AS FOR A 45 MINUTE DRIVE ON APRIL 29, SO, I DON'T BELIEVE IT'S THE BATTERY, EITHER. THIS IS A KNOWN ISSUE WITH THIS MAKE/MODEL OF CAR. I AM AFRAID IT WILL BREAK DOWN SOMEWHERE OTHER THAN MY DRIVEWAY AND LEAVE ME STRANDED OR IN DANGER, SUCH AS AT AN INTERSECTION.

IN FEBRUARY 16 DRIVING IN FREEWAY AT 67 MILES AND THE ENGINE LIGHT COME ON AT 10468 AND BLINKS WHILE DRIVING THE ENGINE LOSS SOME OF POWER AND PULLED OVER TURN OFF THE ENGINE AND ATTEMPTED TO STAR ENGINE AND TOOK 5 CRANKS TO START ENGINE NEXT DAY FEBRUARY 17 TAKE TO DEALER AND THE DEALERSHIP TOOL ME NO FAULTS CODES IN THE SYSTEM BEFORE TOKE TO DEALERSHIP USE SCANNERS HAVE 2 GENERICS CODES PO128 (TERMOSTART NO OPEN PROPERLY) THE OTHER CODE NO POSIBLE YO READ DUE TO LIMITED SCANNER . THE DEALER THE DEALERSHIP THE ADD B 90C042R1 ELANTRA ECM SOFTWARE UPDATE (20-01-008H AND NO MORE DETAILS ABOUT THE CODES O THE UPDATE IN SATURDAY'S APRIL 18 2020 AT 9:10 AM THE ENGINE LIGHT COME ON AGAIN THIS CASE NO ENGINE LOSS OF POWER APPEARS GO HOME AND RECHECK THE CODES AND SAME CODES AT MILEAGE 11539

GOT INTO AN ACCIDENT BUT THERE WAS IMMEDIATELY AN ENGINE FIRE

CAR CONTINUOUSLY SAYS IT OVERHEATING. FIRST TRIP TO DEALERSHIP COULD REPLICATE THE ISSUE. SECOND TRIP A MONTH LATER. REPLACED HEAD GASKET DUE TO LEAK AND EXHAUST PIPE. CURRENTLY SITTING IN IT WAITING FOR ROADSIDE ASSISTANCE. STILL OVERHEATING NOT EVEN A WEEK LATER ALSO NOW PUTTERS AND SHAKES WHEN I TRY TO START IT.

TL* THE CONTACT OWNS A 2018 HYUNDAI ELANTRA. THE CONTACT STATED THAT WHEN THE DRIVER ATTEMPTED TO DRIVE ON AN INCLINE, THE VEHICLE STALLED SEVERAL TIMES. THE VEHICLE WAS TAKEN TO AN UNKNOWN DEALER WHERE METAL SHAVINGS WERE FOUND IN THE ENGINE. THE DEALER ALSO TEST DROVE THE VEHICLE AND WAS ABLE TO RECREATE THE FAILURE. THE DEALER ADVISED THAT THE ENGINE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS CONTACTED AND STATED THAT THE VEHICLE WAS NOT INCLUDED IN NHTSA CAMPAIGN NUMBER: 15V568000 (ENGINE). THE APPROXIMATE FAILURE MILEAGE WAS 59,000.

TL* THE CONTACT OWNS A 2018 HYUNDAI ELANTRA. WHILE DRIVING VARIOUS SPEEDS, THE CONTACT HEARD AN ABNORMAL BANGING NOISE EMERGING FROM THE VEHICLE OVER SEVERAL WEEKS. THE CONTACT NOTICED THAT THE EXHAUST PIPE WAS LOOSE AND DETACHED. THE VEHICLE WAS TAKEN TO KEARNY MESA HYUNDAI (4797 CONVOY ST, SAN DIEGO, CA 92111, (858) 278-7100) WHERE IT WAS DIAGNOSED THAT THE EXHAUST ASSEMBLY NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 9,086.

WHEN ACCELERATING WITH MODERATE TO HEAVY THROTTLE INPUT, THE ENGINE EMITS EXCESSIVE PINGING AND RATTLES NOISES. IT SOUNDS LIKE "SPARK KNOCK". NO MATTER WHAT BRAND OF FUEL OR OCTANE I RUN THE CAR ON, THE ENGINE MAKES THESE PINGING AND RATTLING NOISES. I'VE BROUGHT THE CAR TO THE DEALERSHIP SERVICE DEPT. TWICE SO FAR TO ADDRESS THIS CONCERN. I WAS INFORMED THE FIRST TIME THAT THEY HEAR THE NOISE, BUT CANNOT DIAGNOSE IT BECAUSE THE CHECK ENGINE LIGHT ISN'T ILLUMINATED. ON THE SECOND VISIT, THEY TOLD ME IT IS A NORMAL NOISE FOR THE CAR. HAVING OWNED A HANDFUL OF VEHICLES OVER THE YEARS, THIS NOISE IS INDICATIVE OF SPARK KNOCK. IF THE PROBLEM IS INDEED EXCESSIVE SPARK KNOCK, THIS CAN LEAD TO CATASTROPHIC ENGINE FAILURE, CAUSING SUDDEN LOSS OF ALL POWER. AFTER RESEARCHING THE ISSUE ONLINE AND SPEAKING WITH OTHER OWNERS, IT IS APPARENT TO ME THAT IT IS A FAIRLY COMMON PROBLEM WITH THE 2018 HYUNDAI ELANTRA SEDAN. I WOULD LIKE HYUNDAI TO INVESTIGATE THIS ISSUE AND COME UP WITH A FIX. THIS PROBLEM HAS EXISTED SINCE BRAND-NEW OFF THE DEALER LOT. THE CAR CURRENTLY HAS APPROXIMATELY 4,000 MILES.

I BOUGHT THE CAR BRAND NEW WITH 20 MILES. I AM THE ONLY OWNER. WHEN I BOUGHT I NOTICED THE ACCELERATION ISSUE. I INFORMED THE DEALER 10 DAYS OWNING IT THERE IS AN ISSUE ON THE ACCELERATION. I PRESS GAS I CAN HEAR THE NOISE ON ENGINE AS IF I WAS PRESSING GAS AND THE CAR IS ON PARK. IT HAPPENED AGAIN RIGHT BEFORE THE FIRST MAINTENANCE. THEY ASSURED ME THEY CHECKED IT AND EVERYTHING WAS FINE. I WAS RECENTLY ON THE HIGHWAY I WAS DRIVING BUT I HAD TO SLOW DOWN DUE TO TRAFFIC. WHEN SPEED PICKED UP I TRIED TO PICK UP SPEED AND AGAIN HIT THE GAS PEDDLE AND THE CAR WAS'NT MOVING

DOES NOT HEAT UP QUICKLY ENOUGH IN COLD TEMPS. IT TOOK 15 MINUTES AT 38 DEG FAHRENHEIT, CITY DRIVING BEFORE THE TEMP GAGE SHOWED NORMAL OPERATION TEMP.

VEHICLE TOOK TWELVE MINUTES TO CLEAR FROST FROM WINDOWS AT 30 DEGREES FAHRENHEIT. VEHICLE WAS STATIONARY IN PARKING LOT AT IDLE. VEHICLE STARTED TO SHOW SIGHS OF DEFROST AT SIX MINUTE MARK. VEHICLE WAS DROVE ONE MILE AFTER CLEARING OF WINDOWS AND NEVER WENT ABOVE FIRST MAKE ON ENGINE TEMPERATURE GAUGE.

ENGINE NOISE BECAME VERY LOUD OVER SEVERAL DAYS; TOOK TO DEALERSHIP WHICH TOLD ME A WELD IN THE EXHAUST PIPING SYSTEM HAD FAILED AND THAT THE EXHAUST PIPE HAD BROKEN OPEN. THEY SAID IT WAS NOT SAFE TO DRIVE BECAUSE OF POTENTIAL FOR EXHAUST COMING INTO CABIN, ORDERED THE PART AND GAVE ME A LOANER, ON 10/2, SAYING THE EARLIEST I COULD REASONABLY EXPECT TO HAVE MY CAR BACK WOULD BE 10/18.

I WAS DRIVING ON THE HIGHWAY AT NIGHT WHEN THE "ENGINE HAS OVERHEATED" WARNING CAME ON, AFTER WHICH I MANAGED TO MAKE IT TO A LOCAL ROAD NEAR BEFORE THE CAR STALLED. I HAD IT TOWED TO A HYUNDAI CENTER THE NEXT DAY, WHERE THEY TOLD ME I HAD A TRANSMISSION FLUID LEAK AND THEY FIXED THE ISSUE. TODAY, LESS THAN A WEEK LATER, I WAS DRIVING AND ABOUT TO GO ON THE FREEWAY WHEN THE "ENGINE HAS OVERHEATED" WARNING CAME ON AGAIN. I FELT LIKE IT WOULD BE TOO DANGEROUS TO CONTINUE DRIVING IN CASE THE CAR STALLS AGAIN AT NIGHT ON A FREEWAY, AND AM WAITING ON A RESPONSE FROM HYUNDAI TO EITHER FIX OR REPLACE THE CAR.