2015 Nissan Leaf: multiple warning lights

Filed Jul 24, 2025 · Brakes, Electrical · ME

My Intelligent Brake Unit failed. I was slowing down at a major intersection to stop. The ABS system activated and the brakes did not respond appropriately. The pedal went soft. Multiple lights on the dashboard lit up. My two year old child was in the vehicle with me, and we are still recovering from this traumatic experience. I considered the car disabled and had it towed to a mechanic. I then brought it to a Nissan dealership who identified that the entire intelligent brake unit needs replacing for $5,500, which is more than half of what I paid for the vehicle.

Filed Jul 25, 2023 · Brakes, Electrical · CA

I approached a red light at an intersection intending to make a right turn. As I pressed the brakes to stop before the turn, the car did not slow and I was forced to make the turn against the red light. After the turn I was able to stop the car using the parking brake. After coming to a stop I noticed multiple warning lights on the instrument panel had come on which were not on previously.

Filed Oct 6, 2022 · Brakes · CA

Complete brake failure due to the intelligent brake unit. Driving on the freeway when multiple warning lights flashed at once and I lost brake functionality. I used to emergency brake to slow to a stop. This is an intermittent failure because after it sat for 30 minutes brake functionality returned. I'm very concerned about this issue and have seen multiple people reporting this issue for Nissan Leafs.

Filed Mar 4, 2022 · Brakes · CT

On Feb. 16, in about 25 degrees F, my wife pressed the brake pedal and the car did not react at all. She then jammed the brake pedal to the floor and it seemed that the anti-lock brakes stopped the car. She turned the car off and on again, and drove right back home, only about a mile away. I drove the car carefully that day without incident. We took it to Middletown Nissan as soon as they could get us in, the next day. They could not duplicate the problem and tested various components. Everything passed their tests, so we assumed the problem was isolated. Then, today, March 4, at 29 degrees F, the brakes failed for me on a very busy road. Again, it was at a slow speed, as I was approaching a red light. Again, it took pushing very hard to the floor to get the car to stop. All the warning lights on the dash lit up, and there was an odd buzzing sound coming from under the hood. I drove the 3 miles home very slowly and carefully, and the brakes failed in this same way every time I tried them. I called Nissan customer service and they (Lydia) indicated that they had no information about this problem and suggested I go back to the dealership for further investigation. This is what I will do. I am waiting for a call back from them now, but it's Friday afternoon and I am not hopeful that they will be able to get my car in there today. It's very frightening and unsafe when you don't know if your brakes are going to work. I mention the outdoor temperatures because I've seen some information about 2015 Leafs being recalled for a cold-weather brake failure. It's not been in extreme cold that we have had the issue.

Filed Jan 24, 2022 · Brakes · NY

In minus 12 degree temperature, I traveled to a store without incident and parked. Upon returning to the car and starting it, several warning lights went on, including the brake warning light was red, the electric shift control icon was red, VDC indicator light was on, master warning light was red. (may have been other warning lights on). Message was displayed to use parking brake to stop the car.Before applying the parking brake I tried to drive cautiously as I was on a small slope and the display showed my battery level was ok, and ample for the miles to go home, When I tried the brake there was a clicking sound somewhere underneath the car. There was no brake action so I stopped by using the parking brake. I tried this slow roll out two or three times to confirm I could stop the car if I used the parking brake, and there seemed to be no other cautionary problems showing. I was able to drive home with my caution lights, driving on the side of the road, going no more then 15 miles per hour, and using the parking brake when I needed to stop. It was extremely unsafe but most of my ride was uphill going home, and on a Saturday morning at 9am, in sub zero weather, traffic was very calm. The realization of my drive coming into town with most of the trip downhill set in and realized how lucky I was, and how I could have put myself or others in severe danger. I am researching now and will need to find a dealer or independent service center to review the vehicle.

Filed Sep 18, 2020 · Brakes · 37,300 miles · PA

First signs of a problem was a yellow triangular warning sign on the dash when I was close to home, but no driving problems. Next time starting the vehicle at home (all electric vehicle) many lights lit up on the dash and the brake pedal almost went to the floor as it jerked and juddered down, and a loud warning sound was emitted which continued for quite after a while after vehicle was switched off. The car has been flaky ever since, with either a red or yellow warning sign lighting on the dash- or nothing at all. The most serious experience, however, was on september 15 (2020) when I started the vehicle in a parking lot (with my foot on the brake - you can't start without that) - I put the vehicle in reverse and the car started moving back even though I still had my foot firmly on the brake. I had to use a lot of extra force before the vehicle finally slowed down and stopped. Thankfully, there were no other vehicles of pedestrians behind me. In researching this problem online, I have found dozens of similar complaints - which is quite amazing considering so relatively few nissan leafs are on us roads.

Filed Aug 4, 2019 · Brakes · 37,000 miles · CA

Occasionally, brakes fail to work properly when applied at normal (not abrupt) pressure. Then anti-lock brakes activate. This issues is all over the forums, and many have experienced this. Each time the car was brought in, nissan says there is no issue. They reset all the lights and return the car. We have pictures of of warning and maintenance lights on the dash indicating a malfunction when this occurs.then it comes back a few days, or sometimes a month later.

Filed Jan 28, 2019 · Brakes, Driver assistance · 51,000 miles · OH

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.

Filed Jan 4, 2019 · Brakes · 64,893 miles · CA

Upon starting my 2015 leaf, with my foot on the brake, I was able to place the car in reverse; in spite of the brake being depressed, the car immediately began to move. With the brake pedal depressed to the floor, the car continued to move in reverse, until I frantically applied the emergency brake. All dash warning lights became illuminated and the car made a grinding sound, when I stepped on the brake. The tow truck driver had to put car in reverse and use the emergency brake to move the car into a towable position. Per nissan, the intelligent brake control unit failed and would need to be replaced along with the associated harness. Nissan offered to pay $5,500, leaving me to pay $1,500 to cover cost of repair. This is a significant safety concern that the vehicle can have a catastrophic brake failure which completely disables the vehicle. I am very fortunate the failure occurred in an area devoid of any pedestrians and clear of any moving or parked vehicles. I expect that it won't be long before someone is seriously injured by this failure.