NHTSA Complaint #11691873 — 2013 BMW X3

I own a 2013 BMW X3 equipped with the N20 engine. After approximately 17 months of ownership and only around 11,000 miles of normal driving, the vehicle suffered a sudden and complete engine failure without warning. The independent diagnostic determined the failure was due to a timing chain and oil pump drive chain defect, which is a well-documented issue in BMW N20 engines. This defect has been acknowledged by BMW through Technical Service Bulletin SI B11 03 17 and the national class action settlement Bang v. BMW of North America. The defect causes premature wear and eventual breakage of the timing chain components, resulting in catastrophic engine damage. My vehicle is now inoperable, and the cost to repair exceeds $7,500 — far more than the vehicle’s value. There were no prior warning lights, noises, or messages. This sudden engine failure creates a safety risk, as the vehicle could lose power unexpectedly while driving. No authorized BMW dealer had ever performed timing chain replacement on this vehicle, and the issue was not disclosed at the time of sale. I am filing this complaint so NHTSA is aware of the widespread nature and serious safety implications of this defect.