2022 BMW X7

On August 19, 2026, my 2022 BMW X7 xDrive40i experienced multiple safety\-related warnings at approximately 50,411–50,427 miles\. The vehicle first displayed “Increased steering effort” and instructed me to drive carefully to a service center\. It then displayed a red power\-supply warning stating: “Stop carefully\. Do not continue driving\. Continued driving will lead to malfunction of safety relevant functions\. Battery cannot be recharged\. Call Roadside Assistance\.” A drivetrain warning subsequently appeared\. After the vehicle was stopped and later restarted, the warnings temporarily cleared\. BMW of Atlantic City performed a KeyReader scan\. The report documented the steering, power\-supply and drivetrain messages and showed fault code 80402F, described as “12 VOLT VEHICLE BATTERY TOTAL DISCHARGE\.” The report showed the battery status as “OK” when it was read\. BMW Service Information Bulletin 61 01 23 discusses fault 80402F on certain G07 X7 vehicles and states that a software error may prevent the vehicle from entering sleep mode, resulting in discharge of the 12\-volt battery\. The precise cause in my vehicle has not yet been conclusively diagnosed\. I am concerned that an electrical or software failure can occur while the vehicle is operating and trigger reduced steering assistance, drivetrain warnings and the announced potential malfunction of other safety\-relevant systems\. There was no collision, fire or injury in this incident\. I am requesting that NHTSA review this issue for a potential safety\-defect pattern in similarly equipped BMW X7 vehicles\.

Description of the Problem: At ~57,000 miles, the front differential on my 2025 BMW X7 M50i failed and was replaced by an authorized dealer in March 2025. The issue was believed resolved, but in October 2025 the vehicle was returned to Advantage BMW because of a question about when the vehicle showing shuttering, vibration, and binding during low-speed turns. The car has been at the BMW dealership since 10/15/2025, where it was diagnosed with a transfer-case failure. Both failures occurred without any warning lights, messages, or diagnostic alerts. The symptoms were only mechanical noise (front differential) and driveline vibration (transfer case). The dealer confirmed that BMW issued Service Bulletin SIB 27 02 20, describing similar transfer-case/driveline malfunctions. The failed components are available for inspection. This issue poses a safety hazard, as the xDrive AWD system controls traction and stability. Sudden drivetrain failure without warning can cause loss of power distribution between axles and loss of control during acceleration, turning, or highway driving. Multiple owners have reported identical failures on the BimmerPost G07 X7 forum (https://g07.bimmerpost.com/forums/showthread.php?t=2011112), indicating a broader defect pattern. Summary: Two major drivetrain components—the front differential and transfer case—have failed on my 2025 BMW X7 M50i under 60,000 miles with no warning indicators. The vehicle has been out of service since 10/15/2025. Given BMW’s acknowledgment in SIB 27 02 20 and widespread owner reports, this represents a potential safety-related defect requiring investigation.