Land Rover Defender loss of power problems

Filed Sep 30, 2026 · Electrical, Engine · CA

This is a serious concern and safety condition. In several occasions while driving at a range from 45-70mph the engine loses power. To the point where it has felt like it will shut off. The inside lighting of the dash dims while the vehicle is in loss of engine power.

Filed Jul 22, 2026 · Airbags, Electrical · CA

My vehicle is losing power from the battery showing battery needs to recharge and its full charged have to turn interior lights off

Filed Jun 17, 2026 · Electrical, Engine · TN

The DC/DC converter failed and caused the vehicle to immediately lose all power at a main intersection. My wife was driving the vehicle when this happened with out two children in the vehicle as well (ages [XXX] and [XXX]. Luckily, she was able to somewhat get out of intersection of a very busy road. The vehicle had to be towed to the Land Rover dealership. The part was covered by a factory extended warranty. There is an active recall for this part; however, this vehicle does not show to be in the recall. Since this part did fail, I wanted to file a complaint since it is not in the recall. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 7, 2026 · Electrical · TX

What component or system failed or malfunctioned, and is it available for inspection upon request? The vehicle appears to have experienced a failure or malfunction involving the electrical power system, charging system, 12 volt battery system, vehicle communication modules, or related components. Based on the recent Land Rover recall I found online, I am concerned that the DC to DC converter or related charging system may be involved, because the reported recall issue involves loss of 12 volt charging and potential loss of drive power. The vehicle is currently with Jaguar Land Rover Houston Central and should be available for inspection upon request. The vehicle has not been returned to me, and the dealer has indicated that the vehicle was not communicating with their diagnostic computer and was not initially showing fault codes because the modules were not communicating. They have told me that my car is not part of the recall. How was your safety or the safety of others put at risk? My safety and the safety of others were put at risk because the SUV experienced a complete shutdown while I was driving on two separate occasions. The first event occurred Thursday afternoon at approximately 4:32 PM while I was driving on Highway 610. The vehicle suddenly lost power while in motion. I was able to glide off the highway and park on the side of the road, but this could have caused a crash or created a serious hazard because it occurred on a major roadway. The second event occurred Friday morning around 7:20 AM while I was driving on South Rice Avenue to take my daughter to school. The vehicle shut off again and left me stranded. Multiple people attempted to jump start the vehicle, including the tow truck driver, but the vehicle could not be restarted or shifted into neutral. The vehicle remained disabled and required towing. Because the shutdown happened while driving and the vehicle could not be restarted or moved normally afterward, this created a significant risk of co

Filed Apr 15, 2026 · Electrical, Engine · MA

While driving my 2024 Land Rover Defender 130 on Route 114 in Massachusetts at approximately 8:30–9:00 PM in dark and rainy conditions, the vehicle suddenly and completely shut off while in motion. The vehicle lost all power:     •    Engine shut off     •    No gears functioned     •    Vehicle would not restart     •    Lights and hazard lights were not functioning The vehicle was stranded in the middle of an active roadway with no warning and no visibility. Because of this, I had to exit the vehicle into traffic, stop oncoming vehicles, and remove my child from the car. We crossed a live lane of traffic to get to safety while leaving the vehicle in the roadway. I called 911. Police responded and controlled traffic at the scene. In the presence of the responding officer, I attempted to restart the vehicle multiple times. It remained completely unresponsive for an extended period before eventually starting again without explanation. This vehicle experienced a sudden loss of power while in motion on an active roadway. This is a serious safety concern. I do not feel it is safe to transport my child or family in this vehicle. I am seeking a clear and definitive diagnosis and resolution. If this issue cannot be conclusively identified and repaired, the vehicle should not remain in service.     •    RSelect systems:     •    Engine     •    Electrical     •    Powertrain

Filed Apr 14, 2026 · Electrical · CA · crash

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.

Filed Mar 19, 2026 · Electrical, Engine · VA

The vehicle experienced a sudden and complete electrical failure while driving, related to the DC converter. Warning lights did appear prior to the failure; however, I was driving down a mountainous road and do not recall the exact messages. Shortly after, the vehicle shut down and lost power, causing it to roll to a stop in active traffic. At the time of the incident, I was partially in the roadway and unable to safely move the vehicle out of traffic. The vehicle became inoperable and could not be restarted. I had two children and two dogs in the vehicle at the time. The vehicle had to be towed approximately two hours back home. The required part was on backorder for approximately two months due to so many vehicles having the issue, leaving my vehicle unusable for an extended period. This issue creates a serious safety hazard due to the sudden loss of propulsion and inability to move the vehicle out of traffic. Based on my research, this appears to be a known issue affecting multiple Land Rover Defenders. In attempting to locate the part sooner, we contacted several Land Rover dealerships, all of which indicated they had numerous Defenders awaiting the same repair due to part availability.

Filed Mar 4, 2026 · Electrical · VA

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.

Filed Feb 26, 2026 · Electrical, Engine · NY

Car suddenly stopped and lost all power due to DC DC converter issue

Filed Feb 20, 2026 · Electrical · 40,000 miles · CA

The contact owns a 2023 Land Rover Defender. The contact stated that while driving approximately 55 – 60 MPH, the vehicle suddenly shuddered and vibrated with several unknown warning lights illuminated and flashing before the vehicle abruptly stalled and lost power in the middle of the freeway. The vehicle lost steering and braking functionality and was unable to accelerate. The vehicle failed to restart. The contact stated that several vehicles almost crashed into the rear of the vehicle, and a semi-truck came to a screeching halt behind the vehicle. The contact experienced an extreme panic attack and severe anxiety during the failure. The Emergency Services were called to the scene and with the help of the Fire Department, Police, and Ambulance Services, the vehicle was moved from the roadway to safety. The vehicle was later towed to the local dealer who diagnosed the vehicle and determined that the DC-to-DC converter had failed and needed to be replaced. The contact was informed that the part was on back order and that the vehicle could not be immediately repaired. The manufacturer was notified of the failure. The failure mileage was 40,000.