2023 Hyundai Santa Fe Electrical Problems

Your engine has stalled and stopped completely 3 or 4 times while driving since January 2025, with the most recent occurrence on March 30, 2026. The engine cuts out unexpectedly during normal driving and then requires restart. This issue needs diagnosis to identify whether it's related to fuel delivery, ignition, or electrical components.

Your horn has stopped working multiple times, which is a safety concern since you can't alert other drivers. The horn has failed 4 times and required replacement each time. Fixing this may involve diagnosing the horn circuit, including the horn switch, relay, or wiring connections.

Your horn stopped working and you discovered this when you tried to use it in an emergency situation. With only 20,000 miles on your 2023 Hyundai Santa Fe, this is an unexpected electrical failure. The fix will likely involve diagnosing the horn circuit, which could mean replacing the horn itself, checking the horn relay, or repairing wiring connections.

Your horn has stopped working on three separate occasions over several months, each time due to a blown fuse. The dealership has confirmed the problem but cannot explain why the fuse keeps blowing. Since you can't warn other drivers with your horn, this is a safety concern. The fix will likely involve replacing the blown fuse and diagnosing why it's failing repeatedly, which may require electrical system inspection or replacement of a faulty component.

Your horn failed to sound when you tried to alert another driver during a near head-on collision situation. The dealership found that both your high and low horns had completely failed and replaced them under warranty. This is the second horn failure in less than 2 years of ownership, and the dealership confirmed this is a known recurring issue in the 2023 Santa Fe. Repairing this will require replacing the failed horn components with new ones.

Your car's horn stopped working completely, which prevented you from warning other drivers or pedestrians of danger. The dealer confirmed the problem and you had the horn replaced in March 2025, but it failed again by December 2025. When you asked the dealer to cover the repair under warranty, they refused because your vehicle had exceeded the mileage limit for coverage. The fix will involve replacing the horn assembly or its electrical components.

Your car's horn stopped working at 47,474 miles. Additionally, your Check Tire Pressure light is on due to a faulty tire pressure sensor that was identified at 45,650 miles. The horn will likely need to be replaced or repaired, and the tire pressure sensor will need to be replaced.

Both horns on my 2023 Hyundai Santa FE have failed 3 times. The first set was covered under warranty (3/24), the second set cost $499.64 (3/25). Now both horns are nonfunctional after just being replaced this Spring. After reviewing many complaints on the Hyundai community form, it is very obvious there is a major issue with their horns ( and not just the Santa Fe model). Twice this week I was in need of my horn to alert other drivers but instead had to make quick maneuvers to avoid an incident. My vehicle currently cannot pass a state inspection.

On a clear road a sencor comes on detect comes on says detection collision. The breaks come on when you are traveling on interstate or two lane roads. When you are traveling 75 mph and breaks come on all of a sudden on the highway. We are lucky we never got hit in the back of the car going that fast. We will stop 75 to 35 mph in 10 seconds.

At stop sign and car with auto start stop on and at the time of releasing the brake, car was not able to start engine. Car had to be shifted to parking position to start engine.

Horn has failed 4 times

Component/System: Automatic Emergency Braking / Forward Collision-Avoidance (AEB/FCA) system and/or Electronic Parking Brake (EPB). The vehicle is available for inspection upon request. What happened: While driving my 2023 Hyundai Santa Fe (VIN: XXX) at highway speeds, the vehicle suddenly and aggressively applied the emergency braking system on two separate occasions within the same day (approximately 45–60 minutes apart). In both instances, the red emergency braking warning lights illuminated on the dashboard, and a warning sound activated. There were no vehicles, obstacles, or hazards in front of me either time. The braking was forceful and abrupt, causing rapid deceleration at highway speed. Both events occurred under normal, clear driving conditions. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6) Safety risk: My safety and the safety of other drivers were put at significant risk. Sudden unintended braking at highway speeds can easily lead to a rear-end collision since the deceleration was not caused by driver input and gave no warning. Reproduction / dealer confirmation: The dealer has not been able to reproduce the issue, and no diagnostic trouble codes have been found so far. The vehicle is currently at the dealership for inspection. Inspection: The vehicle has been inspected by the Hyundai dealership, but the cause has not been identified. No manufacturer field engineer, police, or insurance inspection has taken place yet. Warning lamps / prior symptoms: During the failures, the red emergency braking indicator and audible warning activated immediately when the brakes engaged. There were no warning lights or symptoms prior to either event. Assessment: Cause UNKNOWN. The problem appears to be an intermittent malfunction of the Automatic Emergency Braking system, forward collision sensors, or related braking components. No diagnostic codes were stored. This is a serious safety issue that occurred twice within one hour and could easily result in a collision.

Horn No longer works in vehicle - A major safety issue

On [XXX] in Rehoboth, DE, my 2023 Hyundai Santa Fe experienced a sudden and complete power failure while reversing out of a parking spot. All electrical systems shut down—including propulsion, dashboard lights, and emergency brake—causing the vehicle to roll backward into oncoming traffic. No warning lights appeared beforehand. After about an hour, power returned on its own. A passing police officer witnessed the situation and a report was filed with the Rehoboth Beach Police Department. On September 6th, Hyundai service performed a diagnostic scan of the engine and transmission systems. No fault codes were found, and the issue could not be replicated. After sitting overnight, the vehicle restarted normally and passed a road test. The dealership documented the incident but returned the vehicle without repair, stating: “Cannot duplicate concern at this time.” I was advised to tow the vehicle in if the issue recurs and, if rolling occurs again, to use a wheel chock. I purchased this vehicle new in 2023. It has only 40,000 miles and is covered under a 10-year bumper-to-bumper warranty. A failure of this magnitude—especially during a basic maneuver like reversing—poses a serious safety risk. Despite the dealership’s inability to replicate the issue, I do not feel safe operating the vehicle until the root cause is identified and resolved. I am currently in the process of escalating to Hyundai corporate for further investigation, including a buyback review, replacement evaluation, or extended diagnostic protocol. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

horn has stopped working. Seems to be a systemic issue when looking online in Forums etc... I have scheduled the problem to be fixed and it is not a fuse issue. It will be a month before the dealership is able to get me in to assess the problem. This is a safety related issue and this needs to be addressed with the manufacturer.

horn has stopped working twice. Had it replaced under warranty in January of 2024. Same incident happened where horn of vehicle does not work. Seems to be a systemic issue. This is a safety related issue and this needs to be addressed with the manufacturer.

On [XXX], a 2023 Hyundai Santa Fe SEL (VIN: [XXX] ) spontaneously caught fire ~8 hours after parking, per fire report (Walla Walla Fire Dept.). The fire destroyed the hyundai santa fe sel engine compartment and totaled 5 vehicles with a total value of over $400,000 not including personal property to the parties involved. I was not the Hyundai’s renter/operator; the vehicle was rented by a third party from Enterprise. Despite no active recall for this VIN, the vehicle contained: Mando ABS module, Mando EPS module similar to known defective parts of the same year, and Hyundai Mobis tow hitch harness, all of which have known defect/recall history in similar make/Model equivalent vehicles. This case may involve VIN exclusion errors or latent product defects similar to recent defects INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The car loses power. The battery and key ignition light keep coming on. A message displays auto engine off. Please shift to n or p and start engine manually. After communicating and showing video proof of the incident, the dealership replaced the alternator and battery. The issues started around 5000 miles. The infotainment system lags and the car lags. Sometimes I am left on the road because the case refuses to cut on or off.

Every time it rains, one of the dual tone horns will fail. I have had the horn replaced 2 times. I am beginning to have a problem with the horn again after this last rain. It is a matter of time before it fails completely after a rain and becomes unusable. I feel this is a significant warning feature that MUST be reliable.

The contact owns a 2023 Hyundai Santa Fe. The contact stated while driving at approximately 55 MPH, the horn was inoperative. No warning light was illuminated. The vehicle was taken to a dealer where it was diagnosed and determined that the horn needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 7,600.

Currently have 518 Diagnostic History Codes (DTC)in memory. Additionally, I have 3 Active DTC’s. The codes are: DTC C160C87 DTC System CHASSIS DTC Sub System LKAS, and DTC C160C87 DTC System CHASSIS DTC Sub System SCC, and DTC C163881 DTC system CHASSIS DTC Sub System SCC FIRST OCCURRENCE: during actual assembly in Montgomery, AL plant. I have asked three Hyundai Service dealers for help. All have tried. Noting noted that contributes to the issues above. At first, my dealer replaced the front camera. Was told it was a heating issue. I have contacted Hyundai BLUELINK service for help. An information report was filed, TWICE. The first report I received feedback that Hyundai’s engineers had corrected the issue. On the following day, the codes returned. A second concern was filed with Hyundai BLUELINK. Hyundai Motor America Case#: [XXX] to wit: “Thank you for contacting Hyundai Motor America. We are in receipt of your e-mail and one of our representatives will get back to you shortly. Sincerely, Hyundai Motor America” Is my vehicle going to fail and cause me injury while operating it on an Interstate highway? This is quite concerning as I drive my car. All I want from Hyundai is to get this issue repaired. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The contact owns a 2023 Hyundai Santa Fe. The contact stated that the horn was inoperable. The lower horn sound had dissipated. Then shortly after the higher horn stopped working. There was no sound when the horn pad was depressed. There were no warning lights illuminated. The vehicle was taken to the local dealer who informed the contact about the cost for the repair, but the vehicle was not diagnosed or repaired. The manufacturer was contacted, opened a case, but no additional assistance was provided. The failure mileage was approximately 72,000.

A few times recently our car has had a hard time starting even though it's only a year old. It's like it's having a hard time turning over. And then when driving, it has a hard time accelerating - it almost feels like the car is in neutral while trying to drive. It jerks and shimmies to the point where you have to pull over to see what's going on. We were on a pretty busy road and couldn't accelerate to the point of safely merging into traffic. An online forum said it was a "loose ground" that's causing the acceleration issues.

Driving up steep hill to my mom’s house car would not drive up, as it hesitated I pressed gas pedal to no avail. I turned off car, got out & nothing was blocking me. Turned car back on & accelerated, this time it went forward.

I have taken my vehicle back into the dealership because my car will sometimes unlock itself, I am constantly having to check the doors to make sure they are still locked and most of the time it has unlocked itself. Most of the time I hear it unlocking as I am walking away. It is very disturbing. It also beeps as if another vehicle is going to crash into me and most of the time there aren't any vehicles anywhere near me. The phone charger does not work, i have been having issues with this from the beginning. The steering wheel also says I have to put my hands on the wheel when I have them on the wheel. I have a video of the car going a lot of rpms and it barely moved, a golf cart passed me up. The car also locks up sometimes when I am backing up. I drive my parents to San Antonio for their Dr. appointments and am a little fearful of staying stranded either direction. My father is very ill and I am their driver. The dealer insists my car is the only one having these issues but I have read on reddit and other platforms of other Santa Fe's with similar issues. These issues do not occur ALL THE TIME, but this does occur at the most inconvenience time.