2022 Land Rover Defender

On 4/2/2026, my DC to DC converter failed in my 2022 Landrover Defender (owned 3 months, purchased pre-owned from dealer), which short-circuited both my 12V battery and my telemetric safety battery (location services, and emergency calls). The vehicle lost all power, completely malfunctioned electrically losing ability to accelerate, power steering, and everything went dark in the vehicle while driving on a highway. I immediately tried to get it to the shoulder but it lost momentum and stopped in the lane, with cars and semis coming around a blind corner at speed. It was a harrowing experience, the car started to roll backwards (on a slight incline, as it was a mountain pass) and a semi truck had to assist in stopping the vehicle by skillfully, using his trailer to stop the vehicle. This created body damage to the entire side of my vehicle. The car then locked up completely, wheels were locked and tow truck had to drag it with a chain up on the bed. My son and I could have been killed, as traffic was coming around the bend at 60-65 mph and we were completely stopped and started rolling back towards the oncoming traffic. Several others could have been injured as my vehicle could have cause a major traffic collision. The issue has been reported to Jaguar Landrover customer service, reported to the dealership I bought the vehicle from and to the dealership who told me that it could help to drive the vehicle to charge the battery. The dealer where I towed the vehicle confirmed it was the DC to DC converter failure, confirmed that it fried or short-circuited both batteries which then caused the car to lose all power. The failure was confirmed by certified mechanics, and approved by an inspector for the extended warranty and repairs were made. There was an electrical fault warning on screen. One dealer told me to drive it to charge battery. This vehicle should be recalled to avoid safety issues.

I believe there is an issue with the DC to DC converter. Had an incident when the vehicle was idling for at 30 mins while cleaning snow in driveway after a storm. I received an warning battery low. As thought this was odd I turned it off. waited a few hours returned and the warning was gone. I had JLR dealer look at the issue. I was told the main battery was faulty and replaced, this was in end of DEC 2025. Then weeks later [around Jan 18th 2026] when it was really cold out and driving to JFK airport. while in route i received an very generic electrical system fault warning. As i was leaving 1 of the terminals at JFK. on the exit ramp of the terminal I had complete electrical failure was lucky enough to be able to be able to pull to shoulder, but was coasting about 1-2 mph, and stop. It took 3 attempts to restart the vehicle, when it started normally and all electrical was acting normal. if this happened while on the highway it would have caused an accident and i believe injuries. i will say the hazard warning lights were still working. I have also been noticing that the digital dashboard display brightness will fade in and out anytime of the day and weather randomly. Today this happened and received a low coolant warning and a tire low warning at the same time. I check the coolant level and it is normal. I check the tire pressures and they are normal.

The vehicle lost power after a warning that the battery was not recharging. I have a portable jump start battery. Tried to jump start it -- the battery would not hold a charge once cables disconnected. Had the vehicle towed to the dealer. I was told this is a DC-to-DC converter problem that is widespread across Defenders 20222-present. parts are unavailable.Being stuck in a vehicle with no power, absolutely dead, is scary and would have been a major problem if the electrics had gone out while driving.

While driving on a busy road. My car gave a message saying electrical failure and transmission failure. Within 20 seconds shut the car down before I could safely pull over and it was unable to start. Hazard lights didn’t work and I was stuck in the middle of the road until a tow truck came. The dealer diagnosed the problem as a failure of the dc to dc converter. It has been replaced but took two weeks to repair

The vehicle experienced an electrical issue regarding a DC/DC converter that went bad after the manufacturer software update. The vehicle displayed warnings that the vehicle needed to come to a stop and that the electrical system, in regards to the safety systems were not functioning. This includes the airbag systems, charging systems, and SOS systems.

The DC converter on our 2022 Land Rover Defender 110 failed. We received some electrical fault notices that would come and go inconsistently a few days before the incident. Land Rover told us to drive the car to the dealer to get repaired, even when we asked whether that was safe. On the way to the dealer, the car completely turned off in the middle of traffic and became a brick and had to be towed in negative degree weather to the dealer where it has sat for a month today. The car shutdown/lost control on Rt 1 in Massachusetts and was fortunately able to steer off the road into a parking lot before it became a brick in the middle of a parking lot, not in a spot or anything. The dealer expects this is a DC converter problem but the car is a complete brick and cannot turn on or be moved around at the dealer until the part arrives. We've been told the part is on back order for months and there is no timeline for when it will be repaired.

DC to DC converter failure that displays a RED warning indicator that says "Stop Safely Electrical Fault Detected" with a red battery indicator symbol displayed simultaneously. I called the dealer as this is the 3rd time I have experienced similar electrical issues that have left me stranded since my purchase of this truck new Jan '22. The dealer brushed me off the first time telling me I didn't drive the vehicle enough, 2nd time they replaced the battery, now they said they had a bulletin (1 month prior) from Land Rover of known DC-DC converter failure with no ETA for parts. I was told by the dealer the steering could lock up and/or the vehicle could have brake failure. I had it towed 1 hour to the dealer. There are 10 other vehicle sitting at this one dealer awaiting the same part replacement and they never notified me of this issue when they were aware of the safety concerns a month prior to my 3rd incident. This is a now known nationwide issue with Defenders and I have a claim in for it to be covered under the factory warranty since my factory warranty had just expired 9 days prior especially given my prior record of electrical issues with this particular vehicle. This is still not resolved and it has been at the dealer for 18 days as it is not safe to drive and still awaits a part with no estimated time for repair.