There are 1 owner-reported powertrain & transmission complaints for the 2020 BMW X4in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
The contact owns a 2020 BMW X4. The contact stated that while driving at 65 MPH, the vehicle inadvertently lost motive power. Upon restarting the vehicle, the vehicle failed to accelerate properly. The drivetrain malfunction warning light was illuminated on the instrument panel. The vehicle was towed to the dealer, who determined that the rear differential had disconnected from the drive shaft. The vehicle was repaired. The manufacturer was not notified of the failure. The failure mileage was 58,000.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026