2023 Land Rover Defender Engine Problems

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)

NHTSA ID

11744806

Incident

Jun 1, 2026

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.

NHTSA ID

11725480

Incident

Jan 18, 2026

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.

NHTSA ID

11721872

Incident

Feb 28, 2026

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

NHTSA ID

11720814

Incident

Feb 6, 2026

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.

NHTSA ID

11717107

Incident

Jan 10, 2026

Mileage

97,000 mi

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.

NHTSA ID

11715474

Incident

Feb 1, 2026

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.

NHTSA ID

11714705

Incident

Jan 31, 2026

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

NHTSA ID

11714514

Incident

Jan 30, 2026

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.

NHTSA ID

11709828

Incident

Dec 14, 2025

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?

NHTSA ID

11707096

Incident

Dec 3, 2025

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.

NHTSA ID

11693370

Incident

Jun 1, 2025

The 2023 Land Rover Defender said emissions fault and died in 4 lanes of busy traffic. This has happened since the first few miles but usually happens in a parking lot. The Defender also throws itself into neutral while in drive. This has happened multiple times and the car has less than $10k miles. I’ve taken it in before for the same issues, it’s getting towed again today.

NHTSA ID

11545327

Incident

Sep 18, 2023

When stopped at stoplight engine gear slips to neutral without warning. When applying gas it becomes apparent it’s no longer in drive. Has happened 8 plus times and I’ve had this new car less than 2weeks. Reported to dealer who tells me 2 other customers have reported this as well. No one is sure why it happens.

NHTSA ID

11473927

Incident

Jul 14, 2022