Around 45 degree weather, while driving on the freeway, my electric battery mileage started to fluctuate erratically (73% to 8% to 14% back to 70% and finally to 60%). It gave me low battery warnings two separate times. At the same time this happened, a warning light indicating the AEB had been turned off started flashing on my dashboard without any collision, jerky movements, sudden stops, or changes to settings. This is extremely concerning because of the car immediately brakes or if the battery dies on the freeway, it could cause a major collision.

- Union City, CA, USA

2 incidents have occurred with this vehicle. The first earlier this year (2021) is that upon slowly accelerating to move closer to vehicle that moved up in a turn lane, the automatic emergency brake system engaged, abruptly stopped the vehicle and many lights lit up across the dashboard. The brakes then released and all lights on the dashboard disappeared. I was not close enough to the car ahead or at any rate of speed that should have caused this abrupt brake reaction. The 2nd incident and most dangerous happened on 8/13/21. I was slowly reversing out of a parking spot at a crowded location, when I saw a car behind my vehicle. I went to brake (not hard brake just regular), and the brakes did not work. I continued to slowly roll back towards the car behind me. I tried pressing the brakes repeatedly and it would not stop rolling backwards. I then pulled the emergency brake and the car came to a stop. No lights appeared on the dashboard. I turned the car off and powered it on again and slowly moved forward into the parking space and tried reversing again. The car was driving completely fine just after. I had a short trip home & didn't drive the rest of the evening. I didn't charge the car as there was still 85% left on the battery. The next morning, the car would not start and a message showing "Service EV System No Power" appeared on the dashboard with multiple lights lit. I called a tow truck to take it to the dealer and they found that the 12v battery was completely dead. Battery light not lit on dashboard prior to the complete outage. The dealer said it was the 12v battery that was likely the cause of these incidents and they replaced it. The brake issues could not be reproduced at the dealer after the new battery installed. Also note, that I just had the vehicle in for a multi-point inspection in June where nothing was found to be faulty. They did recommend a brake fluid exchange, so this was done as well as tire rotation.

- San Pedro, CA, USA

The control panel touchscreen display in the Nissan Leaf (2018) has a denial of service vulnerability that can be used to lock up the screen. Once locked, the touch screen can no longer be used even if the car is turned off and on. The only way to unlock the screen is by removing and re-inserting the sd card containing the mapping data. This seems to arise from the sos functionality locking the touchscreen and not turning off when the car does. To replicate: 1. turn on the car, verify that nissanconnect with sos functionality is enabled by checking that the little light on the sos button is lit. 2. press the sos button. 3. press and hold the sos button while turning off the car. 4. the sos call will lock the screen of the car, and will stay that way until the sd card is removed and re-inserted. Tried reporting this to Nissan, no response.

- Baltimore, MD, USA

While driving the vehicle, without warning the car stopped itself simulating a "slamming on the brakes" affect. There was no warning, the car just stopped. After the car stopped, an error appeared on the screen saying "power supply failure. To avoid accident, serious injury or death do not drive. Contact dealer for service." The car stopping suddenly is very dangerous, if there was another car behind me, or if I was on the freeway, I would have gotten rear ended.

- Corona, CA, USA