There are 6 owner-reported engine complaints for the 2021 BMW X7in NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
While driving my 2021 BMW X7 at approximately 32,000 miles, the vehicle suddenly displayed a drivetrain malfunction warning along with a low engine oil pressure warning. At the same time, I noticed excessive heat and a strong burning smell coming from the vehicle. I also heard abnormal mechanical noises coming from the engine, which sounded like knocking or grinding. The engine failure occurred unexpectedly at relatively low mileage and required extensive repairs, with estimated costs of approximately $15,000. A sudden loss of oil pressure and abnormal engine noises while driving creates a serious safety risk because it can lead to engine damage, loss of power, or the vehicle becoming disabled in traffic without warning. Based on the diagnosis and information from the repair facility, the failure may be related to an internal engine or oil pump issue affecting lubrication. I am reporting this incident because similar failures have been reported by other BMW owners, and I believe this condition warrants investigation as a potential safety-related defect.
Front differential needing completely replaced at 44,000 miles. Might need a transfer case replacement as well. Original quote of $8,300 and if the transfer case is needing replaced, another $8,000-$10,000 job. I have done research online that a lot of other people with X7's are having this issue. Autobahn BMW in Fort Worth, Texas confirmed the issue and that it needs complete replacement done. There were no warnings, no lights on the dash, and nothing that would indicate there was an issue until leaking starting and I could smell the oil burning.
The contact owns a 2021 BMW X7. The contact stated that while driving at 20 MPH and depressing the accelerator pedal, the vehicle went into LIMP Mode. The message "Pull Over and Turn Off Your Car - You Have Lost All the Water In the Radiator" was displayed. The contact was able to pull over to the side of the road. The vehicle was able to restart, but was towed to Hawkeye Motorsports LLC, where it was diagnosed that the water pump pulley had shattered. The mechanic replaced the coolant pump, coolant lines, and belts. Additionally, the coolant lines were tested. The vehicle was repaired. The manufacturer was contacted and informed that reimbursement assistance could only be provided if the VIN was included in a related recall. The manufacturer referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 79,000.
Infotainment stopped working, no backup cam no safety features working
two fan blades came off and punctured my radiator. I replaced the radiator/fan for 4300 and when I picked it up, it said the power was limited and to get it to a BMW dealership right away and when I took it to BMW, they told me the engine was shot and cylinder four was completely destroyed. Then both through BMW corporate and the dealership that I bought the car at new in 2022 I was told there was nothing that they would do at all. In fact I was told it would cost $46,500 plus tax to replace the engine. The car is only worth 40 and I owe 29 I have been without a car for many months and I don’t know what to do with this card is essentially become a paperweight. I bought it brand new at arrowhead BMW for almost $115,000 with 3000 miles on it. Someone had purchased it new and brought it back and I’m not sure why exactly. It just doesn’t feel right that I should only be able to drive a car for 65,000 miles until it’s completely valueless furthermore, my attorney informed me that there was a class action lawsuit around my engine that was closed and it just doesn’t seem right that they would continue to make this engine. I’m hoping there’s some sort of resolved because it’s a very costly situation for me and my family
Car had an error message "drivetrain malfunction" car was drivable. Car has 87000 purchased in 2021. Car needs a new engine. Other Car owners having similar issues with the drivetrain malfunction
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