2015 Nissan Leaf Electrical system Problems

“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. …”

“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. …”

“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. …”

“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. …”

“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. …”