2023 Land Rover Defender Complaint Log

Vehicle: 2023 Land Rover Defender 110 P400 (MHEV) Component Failure: Failure of the 48V DC-DC converter module (L8B2-14B227-AD), which converts 48V to 12V and maintains the vehicle’s 12V electrical system. The component is available for inspection. What Happened: Vehicle displayed “Charging System Fault” and red battery warning. Shortly after, the vehicle became inoperable and left driver stranded. Diagnostics showed: 48V battery retained voltage (~45V) No current output from the 48V system No 12V charging DTC: P065B-16 (Generator Control Circuit Voltage Below Threshold) The DC-DC converter reported “Failure / Standby” and would not initialize. High-voltage contactors did not close, preventing power delivery from the 48V system. Safety Risk: Failure disables 12V charging and can render the vehicle inoperable without warning. This creates a risk of being stranded and loss of essential vehicle functions. Inspection / Confirmation: Issue was confirmed through diagnostic tools (GAP IIDTool). Failure condition and DTC are consistent with DC-DC converter malfunction. Warnings Prior to Failure: “Charging System Fault” message and red battery warning appeared immediately prior to loss of function. No earlier warning. Additional Information: Similar failures involving the DC-DC converter and 48V MHEV system have been reported by other owners. Failures outside of warranty result in significant repair costs.

While driving the dashboard suddenly showed a message saying Battery Charging Fault error” a few minutes later the car stopped driving while I was on a busy freeway. It had no power and it displayed several messages saying suspension system is disabled, battery issue, cameras disabled. I had try to navigate my rolling car to a side lane to call roadside assistance. It was a very dangerous incident and needs to be addressed. Land Rover in White Plains NY, diagnosed my vehicle saying the Dc to Dc converter needs to be replaced and they don’t have any in stock. They also mentioned they have 30 customer cars all waiting for the same part. This was scary and I’m grateful my children were not in the vehicle at the time.

On 2/18/26 the vehicle electrical system stopped working. I unlocked teh vehicle with an emergincy key inside the keyfob. Once towed back to the dealer I was informed that the DC-to-DC converter failed causing the entire electical system to fail/immobilized the vehicle. The part will take 3-4 weeks to receive. Doing my own desk research I see that this is common issue and in many cases reoccurring b/c the part is replaced with a version that is also failing (look at how many different part #'s have been issued).

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.

The dc dc converter failed and had to be towed away. The incident happened while I was driving the vehicle.

DC-DC converter failure. Received dashboard message “Stop safely Electrical fault detected”

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

DC/DC converter failed on the 2023 Land Rover Defender about 2000 miles out of warranty. The parts are on back order with no ETA because so many LR Defenders are having this issue. This can cause your car to die while driving.

DC-DC Converter failed, battery light came on mid-drive and I continued to drive to try and make it to my destination. Car systems started one by one shutting down, first my seat heater then eventually my steering and gas petal. The Vehicle then died and left me stranded in the middle of the road while cars were passing me leaving me unsafe and blocking the road for more than an hour untill a tow truck could arrive. I could have easily been in an accident if I was on a different road do to the steering assist and gas pedal not continuing to work. Making it unsafe for me and many people on the road. The car would also not turn on or go into neutral so I could push it off to the side. Making it a hazard blocking a major road. I took it to Land Rover dealer and they mentioned that this is currently a common issue among Defenders, they have a bunch of them sitting on the lot waiting for this part and it is currently back ordered for several months. Leading me to believe this isn't an isolated incident and that Land Rover should address it before someone gets hurt on the road.

Vehicle was started, while still in park, an alert appeared on the dashboard “stop safely electrical fault detected”. Vehicle was turned off and restarted, with the same warning light on. Called LR dealer, Vehicle was backed out of garage at service advisors advice, parked and flatbed tow truck called.

DC-DC converter has failed causing the car to shut of while driving. During this period of time the car shuts off and the steering wheel locks. Seems to be a massive problem as every dealer we call doesn't have the parts to repair and are quoting months to fix the car.

Received a stop vehicle, "Electrical Fault". Diagnosed by certified mechanic to be DC to DC Converter fault needing replacement. Estimated 1-2 month backorder due to high demand for parts.

An electrical component called the DC DC converter failed in my 2023 Land Rover Defender. I discovered the failure after starting the car after work. A warning that the battery was not charging presented itself. I didn't think it was a major issue and could be something reset easily. I was able to get the car home safely but shortly after the car was completely non functional and could have potentially shut down right on the interstate on my drive home. Currently my car has been at the dealership for over two weeks waiting on a new converter because it is on backorder. This part is quite fragile and its failure can leave drivers stranded on the highway.

The DC/DC converter failed when I turned the car on and I received a warning. Drove straight to the dealership to drop it off for service. Reviewing others with this issue online, it is an extremely common problem and no recall has been issued. Many report their cars dying in the middle of nowhere. To make matters worse, there is a long backlog for the part, months for some people. I’m waiting to hear back from the dealer on my wait time. I hope by submitting a report that you will consider requiring Land Rover to issue a recall.

While driving the vehicle warnings alerted me that the battery was low and to start the vehicle ( it was running as I was driving) then the alert changed to pull over when possible. At this time the power steering and power brakes started to fail by the time I pulled into a parking lot the vehicle completely died and I had to push it into a parking spot. I called Land Rover they towed it to a dealership. The dealership in Orlando Florida said that the DC to DC converter failed and that it would need a new one (but the part is on a back order because it’s a common issue and they have no idea how long it will take to get the part) it will take at least 30 days or more to get a new part. Before I managed to pull over in a safe location the steering became very heavy and the brake pedal got very hard and barely stopped the vehicle ( almost had a collision) and steering into the parking lot was extremely difficult.

I own a 2023 Land Rover Defender 130 that I purchased brand new. Since buying it, it has been back to the dealer many times for serious issues. The vehicle has had repeated cooling system failures, including replacement of all upper coolant hoses. Most recently it was at the dealer for coolant loss / no coolant, and the dealer diagnosed failed O-rings going into the turbo and repaired it. I was told this is a common issue but there has been no recall. Shortly after getting the vehicle back, while traveling with my family, I received a dashboard warning: “Stop safely – electrical fault.” Immediately after this warning, the vehicle lost power and died in the street with my family in the car, creating a major safety hazard and risk of being hit by traffic. The vehicle had to be towed. I am currently stranded in NY (away from home in MA) and the vehicle is now at a dealer here. It has been difficult to even get it seen by a technician, and we are supposed to return home tomorrow (Sunday). I have learned many other owners are experiencing similar “Stop safely” failures and it appears related to the P400 DC/DC converter. There have also been incidents where the steering wheel would not turn, and the only way to restore function was disconnecting the negative battery terminal to reset the vehicle computer, which is extremely dangerous. Additionally, the heated steering wheel overheated and burned a hole through the steering wheel and burned my hand while driving. The dealer replaced it under warranty, but the repair notes suggested the damage caused the heater issue, when the damage occurred because of the overheating/burn. This vehicle has had repeated safety-related defects involving the cooling system, electrical system, steering, and heated steering wheel, including sudden shutdown in the roadway with passengers. I request NHTSA investigate for a potential recall.

Stop safely electrical fault detected appeared on dash DC failure Vehicle is not drivable

While driving my Defender 130 at Highway speed a warning for a faulty electrical system light came on. Within a mile while I was trying to exit the highway, all electrical systems failed. I had a gearbox failure warning and the car went into neutral at highway speed. Power steering failed and I had to manhandle the vehicle off the road into a snow drift to get off the highway.

The car completely died. Unable to be jumped. Had to be towed. There’s a problem with the DC/DC converter. The parts going to take at least 3-4 weeks to come in. My dealer states they have over five or six vehicles waiting for the same repair. This should be a recall issue!

The contact owns a 2023 Land Rover Defender. The contact stated that while driving at undisclosed speeds, the vehicle shut off unintendedly. There was an unknown electrical warning light illuminated. The vehicle was towed to the local dealer, where it was diagnosed with a failure with the DC converter Part Number: 433123464. The contact was informed that the part needed to be replaced. The vehicle was not repaired because the part was on backorder. The manufacturer was not contacted. The approximate failure mileage was 61,000.

Car only has 42K miles on it- we were driving down the highway at approx 75mph, when the dash alarms started going off indicating an electrical system failure. A few minutes later all systems started flashing failures (lane keep assist system, braking system, etc)....then suddenly the gear box system failure alerted and the gears disengaged, the RPM's shot up and red-lined, and the CAR lost power in the middle of the highway. Fortunately we were able to get off to the shoulder without getting hit by a semi-truck. The car was completely dead. It had to be towed to a dealer, to find out that the DC/DC converter had failed- and these parts have been on back order for months- apparently this is a common issue with these cars, and people have been talking about it online...many have been without their car for 3-4 months waiting these parts.

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.

The DC/DC converter failed causing the generator not to charge. This caused the car to lose all power whilst I was driving the vehicle and come to a complete stop on an active road.

A known LR Defender MHEV system problem. Specifically, a DC-DC converter failure - while driving vehicle on busy highway. Failure systematically shuts down vehicle. Please refer to: Land Rover Charging System Fault: The DC-DC Converter This is a serious safety issue. The Defender becomes completely disabled while driving.

While driving on the freeway I recieved and elctrical fault detected please pull over when safe. The issue is the DC to DC converter failed resultign in the loss of charging for the car and relaince on stored elctricity in the battery to drive systems. I was on the highway at freeway speeds and had to exit the highway quickly to avoid the vehicle completly shutting down on the freeway. The dealer has verified the issue. There is significant discussion on owner boards about the numerous failures across all years of the mhev defender resulting in owners being stranded on the side of the road. Land Rover needs to issue a recall to replace this defective part.

The contact owns a 2023 Land Rover Defender. The contact stated that while driving at an undisclosed speed, there was white smoke coming from the engine compartment. The message to “Add Coolant” was displayed. The coolant was added to the coolant reservoir; however, the failure reoccurred. The contact was constantly adding coolant; however, there were no coolant leaks found. The vehicle was taken to an independent mechanic; however, the cause of the failure was not yet determined. The vehicle was not diagnosed or repaired by an independent mechanic or dealer. The contact referenced an unknown recall; however, the VIN was not under recall. The dealer was made aware of the failure and informed the contact that the vehicle needed to be diagnosed. The manufacturer was not made aware of the failure. The failure mileage was approximately 97,000.

Powerconverter failure. Repair part unavailable Constant coolant leak (documented more than 4 repair attempts since purchase.

The vehicle experienced an electrical fault and shortly after receiving the warning on the dash, the vehicle completely lost power in the middle of traffic. The dealership has told me that the hybrid battery and DC converter both need to be replaced, but the DC converter is on indefinite back order. Based on information I’ve learned from others and I’ve heard from the dealership, Land Rover has been aware of this issue for about a year, but parts have been unavailable for several months. My dealership alone has several of the same vehicle suffering from the same problem, get Land Rover seems to have no path towards resolution.

On December 29th 2025 my car displayed an alert "Electrical Fault Detected: Please Pull Car Over Safely". I was in rural New Hampshire at the time so continued driving (for about 5 minutes) until I lost all power steering, stability controls and ability to drive the car - luckily by this point I had made it to Gorham, NH. Luckily it was just me in the car and not my family as the temps were below 10 F that day and Land Rover couldn't get a tow until the next day. Since then the car had to be towed to Land Rover Bedford and has been in the shop since as they dont have any DC Converters (Part number 433123464) in the US. Apparently there are 1400 Land Rover Defenders all sat in garage lots as nobody can get this part in the US from the manufacturer. There is no ETA on when the part will arrive in the US and I will have my car back.

DC Converter for Hybrid system malfunction with complete battery discharge rendering the vehicle inoperable while utilizing. Lucky that the occurrence occurred in low traffic area! Unable to move vehicle onto flat bed truck because of electrical controlled gears. Unable to secure vehicle because of electrical controlled door locks. Replacement product on back order -estimate at least 6 weeks.

The DC to DC converter Failed. It is part of the mild hybrid system. Multiple cars in my state and globally have reported the same failure around the same time. Supposedly these failures are due to the cold weather. At the 1st start up of the day a warning message displayed "Stop safely Electrical fault detected" the it disappeared after 1minute. After the 2nd start up the message reappeared and stayed on. I drove straight to the dealership where the vehicle would not be able to start or move again. My safety and others would have been at risk if the vehicle would have been immobile on the road. The vehicle has since had the DC to DC converter replaced as well as the battery which suffered power drain. These repairs were done by the manufacturer/dealership under warranty. The DC to DC converter was on back order for months due to so may vehicles suffering the same failure. With more cold weather ahead is the replacement part or system safe? I think this issue needs to be investigated.

The Defender is only 2 years old, with 59k miles. Outside of warranty. It is a mild hybrid. Received an emergency electrical fault issue. Car stalled out. Had to get it towed to dealership. Its been with the dealership for a month now, with another month anticipated for the part, a dc converter, which is on backorder with LR to be delivered. Battery is dead also. Total repair is estimated at $3100. I will be without the vehicle for atleast 2 months. Looking through the internet it appears this is an issue with LR. Filed a complaint with LR corporate. They are aware of this happening also to vehicles which would explain the backorder on the part. No recall yet however.

My car died on December 14, 2025 when I was pulling out of my driveway. It read “stop safely electrical fault detected.” And then shut down and would not turn on. Then it said “battery low. Please start engine.” But the car would not start. I had to get it towed to the dealer. They told me it was a the DC converter or the epic module. They said this is a company wide issue with the 2023 defenders and they do not have the part in stock and that it is on back order. Right now they are stating that the part may be in in mid February. Previous to this issue I also had issues two times with my car stating engine coolant issues and had to bring it to the dealer two times to get fixed.

we had a coolant leak like the one reported on recall N785, I called the Land Rover USA office and they said that they only have a "voluntary" recall for this problem and I need to pay for them to fix it. It's not faire that they refuse to fix something that is happening in the same car and model but different engine type. They know they need to recall all the Defenders. What you can do to protect us?

Took my car to the dealership to have the windshield replaced due to a rock chip. Driving home on the freeway with the new windshield installed, I noticed a new crack moving across the windshield. I had on driven only 45 miles. Contacted Landrover and was told it was just an unfortunate chance event. I previously had a windshield replaced for the same reason. I now need my 3rd windshield in 1 1/2 years

The door actuators are failing which is a very common problem on these vehicles. This fault makes it impossible to lock the doors and arm the vehicle. This is a significant safety issue. Based on the widespread complaints it seems reasonable that Land River should rectify the problem

1.) Coolant turbo lines leak coolant. Causing the engine to overheat. It is recommended by the dealer to replace the two(2) o-rings and bypass hose assembly. 2.) This is a high risk this can cause risk of an engine fire in addition to major damage to the engine. 3.)The Land Rover Dealer (Annapolis, MD) has confirmed that this is a known issue. Further research online confirms from other customers with dealers that this is a known issue. 4.) The dealer performed diagnosis on the vehicle and confirmed the parts that need replacing. 5.) As the engine gets close to overheating, you notice the temperature gauge moving to red and a warning message that the engine is overheating. Initially, you will notice messages that the engine coolant level is low and as the problem progresses, you will see the message more frequently. I have personally gone through two full bottles of antifreeze in a day. The cost of repair is over $2500.

The windshield is very prone to splintering, chips and cracking from even small roadway impacts. I have had to replace the windshield twice in the last 6 months. This has been an ongoing problem with Defender 90 windshields from what I can read and the manufacturer is very aware of it. The windshields pose a danger to the driver at worst and an ongoing and expensive maintenance expense at best.

Windshield cracked for no apparent reason. No rock chip. Crack at upper middle of the windshield and goes towards driver side about 16 inches long.

Windshield cracks easily.

Vehicle windshield spontaneously cracked with large crack extending across most of passenger side. Vehicle has 10K miles. No offroad driving. No rock or foreign object struck vehicle. Driven on smooth roads. Weather was not issue. This is clearly a SAFETY issue. Crack will likely extend and I will need to replace windshield in vehicle less than 1 year old. I will take a picture of it. It needs to be replaced immediately..I've arranged service but am worried that vehicle-specific windshield is inherently flawed, regardless of who installs it. This was common knowledge (frequent cracks) in this model through 2022 but I don't know what has been done to address the problem. thank you

The contact owns a 2023 Land Rover Defender. The contact stated that while driving 35 MPH with no other vehicles or objects nearby, the Forward Collision Avoidance system activated with the Automictic Emergency Braking function drastically slowing the vehicle nearly causing a crash. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 13,000.

Windshield cracks. Minor chips causes major cracks that go across the windshield and reduces visibility. While driving, I watched the crack spread across my sight line which impaired driving. This is the second windshield I have had to replace in two months. Service center states that are having to repair many windshields for this vehicle.

Steering wheel is locked and does not turn the wheels

The steering column won't move. The car starts, you can drive forward and back but the steering column doesn't move. This has happened twice now and I am afraid if this happens while I'm driving unexpectedly, death or serious injuries are very possible.

Windshield issue having to replace Windshield twice in 4 months if rock hit it spread . Wondering if their an issue with how the windshield are made overseas

Lane assistance and power steering failed. There was no warning light or alarm. The warning light in the dashboard came on reading “Lane assistance not available” and “power steering resistance reduced” immediately when both systems failed. We were able to safely park, no one was injured. The car has been at the service center at the dealership for 10 days.

Dec 6. Started vehicle and steering wheel would nor move. All functions of car worked. Fwd, rev, engine running , lights all worked. Turned off and restarted 3 times and steering wheel still not moving. All of a sudden wheel became free. I worry now if this could happen while driving. Light did come on saying "lain assist not available"

The power steering failed and the car was not drive-able. The warning light for no lane assist available also turned on. The vehicle was in-operable and left us stranded. This would have been a much bigger issue in the winter time, or if I was not at my home. I contacted Land Rover, who had me call LandRover road side to have the car towed to the dealership, since this occurred on a Sunday. They confirmed the issue of power steering malfunction. There was no warning that his was going to happen. It first appeared when we tried to start the car and it was not drive-able. Once at the dealership, I was made aware there was a service bulletin-not a formal recall- regarding this malfunction. It required two code updates (that I was unable to complete with attempt to update software prior to tow) and a battery reset. With this being such a significant issue, making the car in-operable, it was frustrating to hear it was a known issue that was not a recall. The dealership told me there were others in the area that had the same issue and were fixed, with out recurrent of the issue.

Sitting in my car warming it up and the windshield pops and the is a 2 foot crack in the windshield