2022 Land Rover Defender Electrical System Problems

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.

8/25/2023 18,118 miles, vehicle purchased. Warranty 48 months or 50,000 miles. Factory warranty remaining 31 months or 31,905 miles. 1/8/2024 26,536 miles, L Headlight failure, electric door lock malfunction, air suspension failure. Headlight = warranty replacement. Service Department = no solution, diagnostic code or replication of electric lock or suspension issue. 3/26/2024 30,285 miles, R Headlight failure, Low Battery notification. Tested Battery- passed. Headlight- warranty replacement. 4/30/2024 32,175 miles, Low Battery notification. Tested Battery- failed. Battery replacement and battery reset module = warranty replacement. 11/7/20205 58,812 miles, Turbo Coolant O rings failed- mechanical. Service writer advised this is common for these engines in the V6 defender models. Repair estimate $642.77. Dealership - provided good faith discount. Customer agreed to and paid a negotiated repair totaling $377.30. Despite all repairs, electrical warnings continued off and on with Low Battery notifications, that would appear and disappear. 1/31/2026 (62,105 mi), electrical issue, Low Battery notification, then “STOP SAFELY – ELECTRICAL FAULT DETECTED” notification. Caused vehicle failuer & shut down. Required towing. "STOP SAFELY – ELECTRICAL FAULT DETECTED" notification – electronic fault affects: Power delivery, Steering, Braking, Stability systems. Dealership Diagnosed fault code P0D33-11, failed DC/DC converter and batteries. Replacement Cost +$2,467.38. DC/DC Convertor OEM Parts are on national backorder. 1-2 months lead time. QTY 15 units waiting. Low battery warnings & P0D33-11 code are related. Weak 12V battery = stress the DC/DC converter, fault codes, conversely, a failing DC/DC prevent the 12V battery charging. These repeated low-battery warnings and electrical failures are directly related to DC/DC converter failure and represent an ongoing electrical defect that originated during the warranty period, not normal wear and tear.

Electrical fault detected - pull over safely error message appeared while driving, and when vehicle was shut off, low battery warning appeared. Started vehicle and attempted to put in drive and failed with drivetrain error, then suspension error and power steering error. Replaced 12V battery next morning and still received electrical fault error. Towed to dealer and diagnosed with DC-DC converter failure.

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.

Lost all power due to failure of DC/DC Converter, Part # 433123464 (or LR131043). This problem is widespread and the replacement parts are on backorder. Land Rover cannot provide an ETA for delivery of parts to dealerships as of 1/30/2026. This failure occurred immediately and the vehicle came to a complete stop while driving.

The battery recharging system failed causing the entire vehicle to shut down. The suspension, gearbox, and starter all stopped working without warning.

Safety Complaint – DC-to-DC Converter Failure Causing Vehicle Shutdown I am submitting this complaint to report a DC-to-DC converter failure that rendered my vehicle inoperable. The authorized Land Rover service department diagnosed a failed DC-to-DC converter. This component is part of the vehicle’s electrical system and its failure caused a loss of vehicle functionality. I was informed the replacement part is on national back order, with an estimated repair time of up to two months. Based on owner reports and service discussions, this appears to be a common failure affecting Land Rover mild-hybrid vehicles. Many reports describe sudden loss of electrical power, warning messages, and vehicle shutdown. This issue presents a potential safety risk, as failure of the DC-to-DC converter can result in loss of vehicle systems and may occur without warning, including while the vehicle is in motion. The vehicle is currently unusable. It is concerning that a critical electrical component with safety implications is failing at relatively low mileage and that replacement parts are not readily available. I am requesting NHTSA review this issue for potential investigation, recall, or other corrective action.

Vehicle display provided warning of Electrical Fault and shorty thereafter the vehicle "bricked" ie. became entirely inoperable. I was able to jump start the engine but as soon as the vehicle was disconnected from the jumping power source the vehicle's engine shut down. The vehicle was towed to the dealership. The tech with the towing truck jump started the vehicle and noted the problem appeared to be with the alternator (ie. excessive draw on the power source). The dealership has tentatively diagnosed the problem as the DC-DC converter which serves as the alternator in this vehicle. The part has been back ordered for quite some time. The failure of this component seems to be a widespread issue with a number of Land Rover models.

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.

DC to DC Converter failed, rendering vehicle dead. No parts available to repair. Forced to wait for months.

DC/DC Converter went out and car had to be towed away. Part is on back order for several weeks.

The car had electrical Warning- literally the vehicle in totality shut down and I needed a tow to dealership- after diagnosis an electrical part-DC CONVERTER PART # 433123464. The part is unavailable anywhere. I called tri-state area in my own attempts for my car to be repaired. I was advised my the dealer that EVERY DEALERSHIP IS WAITING ON 5-10 of the same part!! I was currently advised the part is being manufactured in the UK -shipping estimate date mid January 2026. If this is infact the situation -I would like someone to look into a recall- the $700 part expires with my warranty!!! In February 2026. The vehicle in dead-without the DC converter

On [XXX], while driving approximately 30 mph, my vehicle displayed the warning “STOP SAFELY – ELECTRICAL FAULT DETECTED.” I immediately pulled over and restarted the vehicle, but the warning reappeared. Due to safety concerns and proximity to my home, I cautiously continued driving. Two blocks from my residence, I stopped briefly and received a message stating “BATTERY LOW – PLEASE START ENGINE.” After restarting and turning the vehicle off again, the original warning cleared; however, the vehicle has been completely inoperable since [XXX]. The SUV was towed for battery replacement and then towed again after diagnosis confirmed a failed DC-DC converter. The dealership has advised the earliest availability of the replacement part is February 19, 2026, resulting in over two months of total vehicle downtime. I have received minimal updates during this time. I reported this issue to Land Rover/JLR but have not received follow-up or resolution. Based on my research, DC-DC converter failure is a known safety issue, and JLR has prior awareness of this defect. This failure presents a serious safety concern due to loss of electrical function while driving, possibly emergency brake issue, along with unreasonable repair delays related to a known issue. I am requesting acknowledgement of this safety concern, clear communication regarding my case, and appropriate assistance due to the extended downtime and still having to pay a monthly car payment/insurance and manufacture warranty just expiring at the 50,000 miles. Thank you for your time, [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

System electrical failure due to a faulty part (DC/DC Converter). This essentially prevents the charging system so the battery dies and the car becomes undriveable. When this occurred to us, the car was in the middle of the road and could not start or move impeding traffic. This is a growing problem among owners of this vehicle and so much so that the part is currently backordered due to so much demand. A warning message was displayed stating "Drive Safely: Electrical Fault Detected".

There were two separate issues. First was the battery dying once 4 months after purchase and again about 12 months after purchase. Both times we were lucky we were not out and about 4 wheeling like we normally do. Second is very recent about 18 months after purchase. Both the coolant feed and return lines to the turbo were leaking bad. O2 sensor came up faulty, as well as PCV diaphragm. This about the 4th serious issue we’ve had with this car. I expected this upon purchasing but got one anyways to try it out for off-roading. More to come soon!

My 2022 Land Rover Defender was equipped with a factory-spec winch (a WARN Xeon Platinum 10-S, with Land Rover-supplied surrounds, etc.) installed immediately upon delivery by a JLR dealership. The winch is setup for a wireless winch remote, which intermittently loses pairing to the actual winch control unit. Due to the design of the Land Rover mounts, however, the winch’s controls (necessary to reset and reconnect the remote) are entirely inaccessible. The truck has to be taken to a JLR dealer every time the winch remote disconnects, the bumper and winch surrounds must be removed, and the controls thereby accessed to reset the system. So, several days’ worth of work every time the remote happens to disconnect, which is not a workable design. I have had the unit examined and serviced four times by dealerships and none are able to address the issue as the issue is with the factory design itself. There are third-party solutions (from WARN) available to reroute the winch controls to an accessible location, which the dealership has recommended I undertake just to get the factory design to function sustainably. This will likely run me $3,000 out of pocket, just to address design issues with the original $6,000 factory accessory. I have already contacted JLR customer service, who offered me a $300 voucher for future dealership service. After many discussions about the insufficiency of this voucher, they suggested that I file a NHTSA complaint.