2015 Nissan Leaf Electrical Problems

Your Intelligent Brake Unit failed while you were slowing down at an intersection. When you pressed the brake pedal, it went soft and didn't respond properly, even though the ABS system activated and multiple dashboard warning lights appeared. The dealership determined the entire Intelligent Brake Unit needs to be replaced, which is a major repair involving the car's braking and electrical systems.

Your 2015 Nissan Leaf's battery has degraded significantly and now only charges to 55 miles of range instead of the expected 150 miles, despite having only 85,000 miles on the odometer and being charged exclusively at home. The car unexpectedly stopped on a highway, creating a dangerous situation that required police assistance. Nissan's dealership refused to address the issue under warranty, citing supercharger use as the cause, even though you've only ever used home charging.

Your car's warning lights, ABS light, and brake light came on unexpectedly, and you lost normal braking ability—requiring significant force to slow the car down. The dealership determined that an electrical module short-circuited, causing the braking system to malfunction. The repair will likely involve replacing the faulty electrical module that controls the braking system.

Your Leaf's electronic braking system failed multiple times, causing the ABS to activate unexpectedly and leaving you with no braking power—you had to shift to Park and use the emergency brake to stop in traffic. The mechanical brakes work fine, but restarting the car didn't resolve the electrical glitch. This is a serious safety issue that has happened three times and needs immediate inspection by a Nissan dealership to diagnose the ABS module or brake system electrical wiring.

When you pressed the brake pedal at a red light, your car didn't slow down and you had to run the light to avoid an accident. You were able to stop using the parking brake instead. After stopping, several warning lights appeared on your dashboard that weren't on before. This suggests a brake system failure that may require inspection of the brake fluid, brake lines, or the regenerative braking system components.

Your car unexpectedly started moving backward on its own while in Park with your foot firmly on the brake pedal. The brakes didn't respond until you lifted your foot off the pedal and reapplied it. This happened a few days after random dashboard warning lights (including the battery light) began appearing. Replacing the 12V battery resolved both the warning lights and the unwanted movement issue. The fix involved replacing the vehicle's 12-volt battery.

Your backup camera display occasionally goes completely black and won't show a picture, even when you shift between park and reverse. The screen typically returns to normal after waiting several hours. This intermittent issue suggests an electrical connection or display problem rather than a camera failure.

I was driving down the road and applied pressure to the brakes. The brakes did not respond and the dash lights lit up indicating several failures. It took 15-20 feet before I was able to completely stop. If this had happened on a busy street or freeway, the results would have been catastrophic. The vehicle is currently located a Nissan dealership and is available for inspection.

The contact owns a 2015 Nissan Leaf. The contact stated while driving 10 MPH, the battery warning light illuminated, and the vehicle lost motive power. The vehicle was towed to the residence and the battery was re-charged. The vehicle was restarted however, the failure recurred several times. The contact took the vehicle to a local dealer who inspected the vehicle but could not determine the cause for the failure. The contact then took the vehicle to Port City Nissan (120 Spaulding Turnpike, Portsmouth, NH 03801, (603) 431-6500) to be diagnosed. The contact was informed that the firmware update needed to be performed. The dealer performed the software update however, the failure persisted. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 41,000.

ELECTRONIC BRAKE ASSIST FAILED WHILE DRIVING IN TRAFFIC, OCTOBER 9TH, 2020. BRAKING DISTANCE WAS EXTENDED AND THE BRAKE PEDAL DEPRESSED MUCH FARTHER THAN NORMAL, CAUSING DRIVER TO STOP CAR WITH EMERGENCY BRAKE. EMERGENCY LIGHTS ILLUMINATED ON THE DASH. ERRORS CODES INDICATE FAULTS WITH THE ELECTRONIC DRIVEN INTELLIGENT BRAKE CONTROL UNIT, THE SUBJECT OF SAFETY CAMPAIGN 16V119000. SUBSEQUENT NISSAN RECALL, WHICH APPLIED 3NF9B FIRMWARE TO THE EDIB, HAD BEEN APPLIED 5/13/16. FAILURES RE-OCCURRED IN COLD WEATHER IN NOVEMBER 8TH, 2020. PROBLEM IS SPORADIC AND DEALER CANNOT REPRODUCE. HOWEVER, A VIDEO OF THE FAILURE WAS RECORDED AND HAS BEEN SHOWN TO THEM. REPLACEMENT PART CARRIES YET A NEW FIRMWARE, 4NP3E. THIS FIRMWARE SHOULD BE MADE AVAILABLE UNDER THE SAFETY CAMPAIGN IF IT MORE FULLY ADDRESSES THE PROBLEM WITH THE BRAKES.

WHILE I WAS ACCELERATING TO 60MPH FROM A STOP LIGHT ON US 287 AND ISABELLE ROAD IN BOULDER COUNTY, COLORADO, THE CAR CONTINUED TO ACCELERATE UNCONTROLLED TO OVER 70. ACCELERATOR PEDAL SEEMED TO NOT WORK AT ALL. I BRAKED AND SLOWED DOWN BUT IT WAS FIGHTING THE MAXIMUM ACCELERATION. I TRIED PUMPING THE BRAKES AND KEPT SLOWING DOWN AND THE CAR LOST ALL ENGINE POWER AND SEEMED TO BRAKE ITSELF. I PULLED OVER TO THE SIDE AND TURNED OFF THE CAR. TURNED IT BACK ON AND ALL SEEMED NORMAL. I AM CONCERNED THAT OTHERS MAY PANIC IN THIS SITUATION AND NOT BE ABLE TO CONTROL THE CAR. THE 2015 NISSAN LEAF I DRIVE HAS 31,000 MILES ON IT NOW AND HAS HAD ALL UPDATES AND SERVICES.

BRAKES FAILED UPON STARTING THE CAR. MULTIPLE WARNING LIGHTS ON THE DASHBOARD (BRAKE, ABS, TRACTION CONTROL, AND BRAKE SYSTEM) RESULTING IN TOTAL BRAKE FAILURE - CANNOT STOP THE CAR WITH NORMAL BRAKING EVEN WHILE JUST PUTTING THE CAR INTO DRIVE/REVERSE FROM PARK. STARTED HAPPENING ~3 WEEKS AGO. THE ONLY THING THAT STOPS THE CAR IS THE EMERGENCY / PARKING BRAKE. IF PRESSING THE BRAKE PEDAL ALL THE WAY, JUST BEFORE HITTING THE FLOOR THERE IS A LOUD POPPING / GRINDING NOISE AND THE PARKING BRAKE (?) ENGAGES. THE FIRST TIME, TURNING THE CAR OFF/ON FIXED IT. WE TOOK IT TO OUR LOCAL NISSAN DEALER, THEY SAID "COULD NOT FIND THE ISSUE IN THEIR SYSTEM" AND SAID IT WAS A "FLUKE" AND WOULDN'T HAPPEN AGAIN. HAPPENED AGAIN A FEW DAYS LATER AND TURNING THE CAR OFF/ON DIDN'T HELP, AND THE CAR WAS STUCK IN OUR DRIVEWAY. TRIED REPLACING THE 12V BATTERY, WHICH FIXED THE ISSUE TEMPORARILY. HAPPENED AGAIN A FEW DAYS AFTER THAT AND HAD TO GET IT TOWED BACK TO NISSAN. *NOW* THEY FOUND THE ISSUE IN THEIR SYSTEM AND THINK IT'S THE "DRIVEN INTELLIGENT BRAKE UNIT" AND COSTS $2600+ TO FIX. THEY ALSO SAY THE "MAIN ENGINE HARNESS" MAY NEED TO BE REPLACED FOR SOME REASON AS WELL, COSTING ANOTHER $2400+. HAVE CONTACTED NISSAN USA, THEY TOLD ME THEY DON'T HAVE A RECORD OF THIS BEING A PROBLEM WITH LEAFS (EVEN THOUGH THERE ARE DOZENS OF COMPLAINTS ON HERE) AND REFUSES TO PROVIDE ASSISTANCE. THIS BRAKE SYSTEM IS *EXTREMELY UNSAFE* FOR THE DRIVER & PASSENGERS, AND EVERYONE AROUND IT. MY KIDS COULD HAVE BEEN NEAR THE CAR WHEN IT STARTED MOVING ON ITS OWN EVEN THOUGH I WAS PUSHING THE BRAKE PEDAL. NO ONE NEEDS TO DIE OR GET GRAVELY INJURED BECAUSE OF THIS FAULTY SYSTEM.

WHEN THE 12-VOLT BATTERY FAILED ON MY 2015 NISSAN LEAF, THE CAR WOULD STILL TURN ON AND WOULD MOVE FORWARD WITHOUT PUSHING ON THE ACCELERATOR. THE BRAKES DID NOT WORK EITHER. THIS HAPPENED TO ME BOTH IN A GROCERY STORE PARKING LOT AT NIGHT AND THEN THE NEXT MORNING ON A RESIDENTIAL STREET. SIMILARLY, WHEN IT TURNED THE CAR ON IN MY DRIVEWAY, I PUT IT IN REVERSE, AND THE CAR MOVED WITHOUT ME PUSHING ON THE ACCELERATOR AND THE BRAKES DID NOT ENGAGE WHEN I PUSHED ON THEM. THE CAR BEHAVED THIS WAY 4 TIMES, INCLUDING ONCE FOR THE NISSAN DEALERSHIP SERVICE WORKER WHO HAD TO PULL THE CAR FORWARD IN THE LINE OF CARS WAITING TO BE SERVICED. AFTER NISSAN REPLACED THE 12-VOLT BATTERY, THE PROBLEM DISAPPEARED. SEVERAL LEAF OWNERS HAVE TOLD ME TO REPORT THE PROBLEM, BECAUSE IT IS A SAFETY CONCERN THAT THE CAR CAN MOVE BUT THE BRAKES DO NOT WORK WHEN THE 12-VOLT IS FAILING. I CALLED NISSAN TO NOTIFY THEM OF THIS PROBLEM BUT DID NOT GET A RESPONSE BEYOND A CALL FROM CONSUMER REPAIRS SAYING SHE WOULD MAKE A NOTE OF IT.

I'VE ONLY HAD THE CAR FOR 2 MONTHS, AND THE BRAKES HAVE FAILED REPEATEDLY, ONCE ABOUT EVERY 5 DAYS ON AVERAGE. EVERY TIME THEY HAVE FAILED, IT WAS WHEN I START UP THE CAR, AND PUT IT IN EITHER FORWARD OR REVERSE. I USUALLY PULL FORWARD INTO A PARKING SPOT, SO I GO IN REVERSE MUCH MORE FREQUENTLY AFTER STARTING UP, BUT IT HAS HAPPENED WHEN GOING FORWARD TOO. THIS IS THE FAILURE MODE. I START THE CAR, WHILE HOLDING DOWN THE BRAKE PEDAL, AND THEN I PUT IT IN REVERSE. AT THAT POINT THE CAR STARTS ROLLING BACKWARDS, EVEN THOUGH I'M STILL HOLDING DOWN THE BRAKE PEDAL. THE BRAKE PEDAL GETS SOFT AND WHEN I FLOOR THE BRAKE PEDAL, THE CAR FINALLY SLOWS DOWN AND STOPS. ANOTHER WAY TO STOP IT IS TO PUT IT BACK IN PARK, BUT THAT CAUSES IT TO JERK TO A HALT. NEEDLESS TO SAY, THIS IS A SCARY SCENARIO, AND THIS FREQUENTLY HAPPENS AT MY KIDS' SCHOOL, WHERE THERE ARE MANY KIDS AND PARENTS WALKING THROUGH THE PARKING LOT. IN ADDITION, THE CAR ALSO HAS SOME OTHER PROBLEMS. IT SOMETIMES STARTS A LONG UNINTERRUPTED BEEP WHEN I TURN OFF THE CAR TO GET OUT. THE BEEP GOES ON FOR MINUTES, AND SOMETIMES I SEE A WARNING LIGHT ON THE DASHBOARD. FINALLY, THE CARD COMPLETELY STOPPED WORKING TODAY. AN ERROR MESSAGE OF "T/M SYSTEM MALFUNCTION" APPEARED ON THE DASHBOARD, AND I WAS NOT EVEN ABLE TO PUT THE CAR INTO NEUTRAL FOR THE TOW TRUCK. THE DRIVER WINDOW DID NOT WORK ANYMORE. AFTER ATTACHING A BATTERY CHARGER TO THE 12V BATTERY, I WAS ABLE TO PUT IT INTO NEUTRAL, BUT NOT ABLE TO PUT IT IN REVERSE OR DRIVE, OR EVEN BACK IN PARK. THE CAR HAD MORE THAN HALF OF ITS BATTERY CELLS FULL, SO THE PROBLEM WAS NOT BECAUSE IT RAN OUT OF CHARGE.

TL* THE CONTACT OWNS A 2015 NISSAN LEAF. WHILE DRIVING 20 MPH, THE VEHICLE SUDDENLY STALLED AND FAILED TO RESTART WITHOUT WARNING. THE VEHICLE WAS TOWED TO THE DEALER. THE TECHNICIAN WAS UNABLE TO DIAGNOSE THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 5,050. THE VIN WAS NOT AVAILABLE.