NHTSA Complaint #11696292 — 2022 BMW X7

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.