Daytime running lights have both failed within the last 79 days. Passenger side failed at ~32660 miles o/a 05 Mar 26. It was replaced under warranty. Driver side failed around 36234 miles on 22 May 26 (5-days out of warranty). It is pending a shop appointment for replacement. This is not a “wear and tear” issue, it is a product quality control issue. It is not a simple plug and play repair. It is a costly repair due to the design of the headlamp assembly. I have owned vehicles since 1988 and last changed a headlamp or taillight bulb in the early 2000’s and that was on a MY93 vehicle. I have also owned two other Land Rovers MY07 LR3 from 2008-2011 and MY14 LR4 from 2014-2022 and did not have to replace a single bulb in the vehicle. Point is that technology and quality have improved over the years and these headlamp/DRL assemblies should not fail with less than 36500 miles on the vehicle. This is a known issue that warrants further investigation. Jaguar Land Rover has issued a Special Service Message 75479 concerning the known issue with the Defender DRL. My DRLs failed in similar fashion described in the SSM. Inoperable DRL reduces safety due to lower visibility since they should operate during normal driving conditions. This issue is dangerous since there is no indication on the dashboard or other warning unless the headlights are manually inspected while the vehicle is operating. Additionally, inoperable DRL leads to a failed State vehicle safety inspections.

SUPPLEMENTAL TO NHTSA COMPLAINT #11728718 (RECALL 26V248000) On March 2, 2026, my 2023 Land Rover Defender was at a dealership for approximately 3.5 hours for key fob programming. At that time, Jaguar Land Rover had an active service message (SSM76173) related to DC-DC converter failures. Within 24 hours of leaving the dealership, the DC-DC converter failed. The vehicle displayed a “Charging System Fault” warning and became inoperable, consistent with the failure described in my original complaint #11728718. I contacted the dealership immediately with information about the issue. They told me that what I experienced aligned with the DC Converter failures that have been reported. I asked if I could get my Defender picked up or if they could at least provide a loaner car if I could somehow get my Defender to them. The dealership declined towing assistance and did not provide a loaner vehicle, citing that I was beyond the mileage limit of the warranty. I was also told that loaner vehicles were reserved for customers who purchased their vehicle at that location. Because I live approximately 4 hours from the dealership and the vehicle was not safely operable, I arranged my own repair. Due to a national backorder, the vehicle was unusable for an extended period (about a month). I purchased a genuine replacement DC-DC converter and paid for expedited shipping. Total out-of-pocket cost exceeded $970. On April 23, 2026, Jaguar Land Rover issued Recall 26V248000 for this defect. Communication with JLR about this incident started on April 7, 2026. On April 23, 2026 at 8:05 am EST (following the announcement of the recall), I was offered a final settlement off of a $458 retailer credit. However, I was instructed that I needed to return to the dealership (4 hours away) for inspection of a vehicle that has already been repaired using an OEM part. I am submitting this update to document the failure, the repair, and the manufacturer’s response following the recall.

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.

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.