2018 Nissan Leaf

This is the second high-voltage traction battery failure on this vehicle. The original HV battery failed and was replaced by Nissan under warranty at an authorized dealer on XXX, at approximately 59,000 miles. The Nissan-manufactured replacement pack has now failed after approximately 16 months in service. On XXX, at ~74000 miles, the vehicle was diagnosed at Johnson City Nissan ([XXX]) with an internal short circuit within the high-voltage battery pack The error codes were P31E7-00 0B and P0AA6-1A 0B. Dealer service personnel identified the condition as an internal short in the pack. Due to the fire risk associated with an internal short in a lithium-ion traction battery, I declined to take possession of the vehicle, which remains at the dealership. An internal short can lead to thermal runaway without warning, whether the vehicle is being driven, charging, or parked. The failure of a factory replacement battery pack in 16 months, following the failure of the original pack, indicates a potential manufacturing or design defect in Nissan's service replacement HV battery packs for this platform. I am reporting this so NHTSA can evaluate whether other Leaf replacement packs exhibit similar internal short failures. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Car was fast charged on July 9th. 2026. After fast charging from 13% to 80%, and driving for a few miles, the overheating warning came on and car was forced to stop on the side of a busy highway until the engine cooled off. While there is an active recall for a similar problem (24V700), my car is not included and we were not notified.

I was traveling north on Freeway 57 at approximately 70mph. The dash lit up red with 12v and charging warnings. Power was shut off and car went into Neutral and warned me to pull over. This is an incredibly busy freeway and I was in the far left lane. I barely made it to the shoulder coasting before car started shuttering and jerking and stopped rolling. I could have been killed.

The contact owns a 2018 Nissan Leaf. The contact stated that after his wife had parked in a parking garage, the vehicle was restarted and driven in 17-degree Fahrenheit weather when the vehicle lost motive power. The "Service EV System, No Power" message was displayed. The contact's wife pulled over and had the vehicle towed to the dealer. The contact stated that the battery had previously been replaced. The dealer determined that the failure was caused by a frozen battery. After the battery had thawed, the battery was able to be recharged. No repair was recommended. The contact related the failure to the variable voltage control system and the 12-Volt battery amp-hours (Ah). The manufacturer was made aware of the failure and a case was opened. The failure mileage was approximately 79,545.

Vehicle randomly shuts down when car is underload traveling at highway speed up an incline and with the climate on. Diagnostics are showing multiple cells that are bad in the main battery manufacturer is stating that it is normal wear and it is normal. I’ve only had the car for 300 miles. It was a previously owned car that was supposed to carry an eight year warranty on the drivetrain and battery. They are not honoring the warranty and the vehicle is dangerous to drive and in fact cannot be driven the situation occurred on three occasions where the vehicle just randomly shuts down on the freeway in the middle of the highway. This is a serious concern that will definitely cause injury or death. I attached photos of two occasions when the battery discharged almost immediately, and the one photo shows on the vehicle was completely disabled. I have more supportive photographs and computer printouts from diagnostics if requested..

Car was descending towards Kailua on the [XXX] on Oahu, HI. Dash lit up with warnings and acceleration and brake pedals stopped working. Brake pedal went to the floor with erratic pulsing sensation and very little brake power. Driver drove car into jersey wall to slow and stop vehicle. Battery state was 60% and battery was replaced under warranty about 1 year ago. While waiting for tow, powered on vehicle and symptoms remained as far as I could check. Brakes had no power and had to use ebrake to keep vehicle from rolling. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I was traveling home from work at approximately 60MPH (speed limit) and I experienced a rapid drop in the state of charge from ~60% to ~25% in 15-20 seconds. I slowed the vehicle to 55MPH and it recovered most of the state of charge. When accelerating to 60MPH a few miles later I experience the same behavior and was forced to maintain 55MPH. I was forced to turn off the electric cabin heater, heated seats, and heated steering wheel as well. I have been able to recreate the issue if the battery is: cold (outside temperature less than 15F and the vehicle has been outside for 8+ hours), less than 60% charged, and put under high load (going up a steep grade/60MPH+) the vehicle will register a battery discharge rate of ~5%/second and continue until the vehicle puts itself into turtle mode, the load is reduced, or I assume, shut off. Battery discharge is "phantom" where the vehicle, when under less load (i.e. slower/slowing), will return to a higher charge, and when no load (i.e. stopped), will return to close to the original charge. Depending on how long the high load is maintained it can drastically reduce the real state of charge on the battery. The Nissan dealership identified it as at least one bad battery module, but no fault codes were registered by the vehicle outside of experiencing turtle mode. This issue forces the driver to slow down to reduce load on the vehicle and abrupt speed changes may be required to keep the vehicle operational. This can put the driver into a dangerous situation of being forced to slow down regardless of road conditions or other driver behaviors. If all of the conditions for the battery listed in the first sentence are met, the vehicle will register a rapid battery state of charge decline, it may indicate turtle mode is active (helps reduce battery load), and it will indicate low charge around 10% state of charge. I have personally experienced all of this as the driver, and any assumptions I have made I have identified.

Our 2018 Nissan Leaf experienced an error message when we tried to start it saying "Warning Service EV System No Power". Mileage: 29,862. It would go into neutral, but not into drive. We called GEICO to have it towed to dealership Leith Nissan on [XXX]. On [XXX], John Day from Leith Nissan called to request permission to install a new 12V battery. I approved the cost of replacing the battery. They said that they were able to drive the car after the 12V battery was replaced. But then they plugged it into the charger, and got an error message "EV System No Power", and they couldn't drive it anymore. Sometime after that there was a thermal event that caused the Power Distribution Module to explode and for soot to pour out of it. These incidents are described by the technician Ryan in these videos [XXX] Nissan indicated that the electric power train is no longer under warranty. Our Q:When did you receive the car? ([XXX] repair order opened [XXX]) When did you first start working on the car? [XXX] When did the thermal event occur? (unsure of occurrence date) When did you replace the 12 volt battery? [XXX] when were you told to replace the high voltage battery? [XXX] when did you replace the high voltage battery? [XXX] Is the replacement high voltage battery a new battery or a used battery? (new battery) Has the replacement high voltage battery been maintained at a charge or is it at 0% charge? And what charge is it at now? (SOC unknown at this time) when were you told the pdm needed to be replaced? ([XXX] after HV battery was installed and further diag was performed) When did you replace the pdm? (not yet completed -- were in process but stopped due to BUS bar bolt discovery) Vehicle was left unattended with no HV warnings with service plug removed but inside vehicle with no cover over port to HV battery. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I was driving at 65 MPH on the freeway and the car was acting/driving normally. Without any warning at all, many lights appeared on the dashboard at the same time that the car placed itself into neutral and lost all power to drive. My speed was reduced so quickly without any notice and I had no pull out lane near me, so I was forced to move across 5 lanes of traffic in rush hour speeds of 60-85 MPH traffic in order to get to safety in a pull out lane while my car was quickly losing speed at 30 MPH and below. I tried to put the car back into drive but it was impossible and the dashboard read "EV maintenance needed". Of note, my entire battery was replaced less than 6 months prior and the Nissan Peoria (AZ) dealership reported no other issues with the vehicle. Upon inspection, the dealership reported the traction motor inverter needs replacement, and again there were no indications this was failing.