2021 BMW X5 M problems

“The alternator terminal post overheated and broke off. The terminal post from the alternator broke off inside the middle of the cable eyelet and had welded itself to the end of the power cable. The cable showed signs of being overheated and melted. The power cable was loose and dangling next to the alternator creating a serious fire risk while driving. When this issue occurred I got a vague message indicating a power related failure and then BMW Roadside immediately called my vehicle asking me to pull over or take it to a service center. I immediately took it to the shop that services my vehicle and they documented the issue and informed me of the safety recall that mentions this specific issue. This is the exact problem related to NHTSA Recall 20V-761 though BMW has told me that my specific VIN is not covered. I also understand that this recall has been extended additional porduction dates more than once. I believe my vehicle is an example of later production models built in 2021 that are still at risk for this issue and should also be recalled.”

“Front differential outer pinion bearing failed at 50,000 miles. Bmw states that it has lifetime fluid in the differential so the fluid was never serviced. The inherent design is flawed as the ball bearings are undersized and the factory fluid 75w-80 degrades very quickly with heat from the engine leading to premature bearing failure and potential catastrophic damage. This is a huge safety issue as failed bearings in the front differential have been known to explode the front differential and destroy the oil pan as well as potentially lock up the front wheels at speed. This is well documented in the owner group forums. BMW needs to own up to their poor design and recall all affected front differentials. Instead, they charge $12,000 to replace the differential with another unit that will also fail in 30-50k miles.”

“My 2021 BMW X5 xDrive40i intermittently fails to start, occurring on approximately 80% of start attempts, and displays the message "Repeat Start Attempt." This has been confirmed by code reading to be a starter-related malfunction. This defect significantly affects vehicle reliability and raises a potential safety concern. BMW previously recalled vehicles equipped with similar starter motors due to starter solenoid defects that could cause overheating, electrical short circuits, and an increased risk of vehicle fire. The symptoms on my vehicle appear consistent with those associated with the previously identified defect. I respectfully request that NHTSA investigate whether the starter motor defect previously addressed through BMW recalls extends beyond the identified production range, including 2021 model year vehicles. The recurring failure, similarity to previously recalled defects, and potential fire hazard warrants further review.”

“Vehicle: 2021 BMW X5 xDrive40i (G05) Mileage: 54,423 miles Component: Central Information Display (CID)/ MGU (Media Graphics Unit) Head Unit Safety Defect: The CID intermittently goes completely blank without warning. When this occurs, the backup camera is unavailable, creating a safety hazard when reversing. Navigation, radio, Apple CarPlay, and vehicle settings are also unavailable. Failure History/Diagnosis: The first failure occurred about one month ago while I was reversing. After several hard resets and leaving the vehicle unused for two days, the display began working again. The failure occurred again yesterday when my spouse started the vehicle. I took it to Bobby Rahal BMW of South Hills, PA. The BMW technician confirmed that the head unit (MGU) and RAM (Receiver Audio Module) are not communicating. The technician also found corrosion on the head-unit power connector and inside the head unit, suggesting moisture intrusion and/or an internal electrical short. The dealer recommended replacing the head unit, with the part costing over $4,000, plus labor and additional diagnosis to identify the source of the leak/moisture causing the corrosion. Inspection:…”

“The contact owns a 2021 BMW X5. The contact stated that the vehicle failed to immediately start. The vehicle started later. The engine and a yellow warning light flashed on the instrument panel. Upon research, the contact located the German Federal Motor Transport Authority (Kraftfahrt-Bundesamt), for KBA Reference Number: 16131R, which was associated with the starter motor. The contact stated that the failure was associated with NHTSA Campaign Number: 24V576000 (Electrical System, Engine and Engine Cooling) and 25V644000 (Electrical System). The vehicle was taken to an independent mechanic who determined that the failure was associated with the starter motor, which was replaced. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted, and the contact was informed that there was no recall on the VIN associated with the failure. The failure mileage was approximately 49,000.”

“The contact owns a 2021 BMW X5. The contact stated that while driving at an undisclosed speed, the air bag warning light unexpectedly illuminated. The vehicle was taken to the dealer where it was diagnosed that the air bag had failed and that the air bag and/or the sensor needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHTSA hotline for further assistance. The failure mileage was approximately 63,382.”