2021 BMW X3 Engine Problems

Mileage when the problem started

Owner reports

Selected complaints filed with NHTSA by 2021 BMW X3 owners, lightly cleaned up (personal details are redacted by NHTSA).

I was slowly pulling into a parking space and as I applied pressure to the brakes, there was no response. In fact the car seemed to rev up and accelerate, jumping the curb and ramming a tree. I was able to steer away from the tree to avoid hitting the center of the front end, but smashing the left front. Even after hitting the tree the car did not slow and I'm trying to pump the brakes, there was no response... I kept going over a grassy area, across a sidewalk and back into the driveway in front of the building, finally the brakes engaged and the car came to a stop. I was then able to pull into another space safely out of the way. I was so lucky it was only 7:15 am and no pedestrians were around and no other vehicles. So I did not hit anyone and did not injure myself.

Car spontaneously caught on fire. Total loss. Drove car home from haircut appointment 5 to 10 minutes away. Parked car as normal and went inside. Within approximately 5 minutes loud knock on door "Your car is on fire!" I came out of my home and saw my car in driveway with fire erupting from engine area onto windshield, and through hole in middle of hood. Took a few seconds of video, then ran into house for large fire extinguisher. Emptied fire extinguisher contents into hole of hood and into fire area coming out from engine area onto windshield.

The contact owns a 2021 BMW X3. The contact stated that while reversing, the vehicle lost motive power. The check engine warning light was illuminated. The vehicle had decelerated and was jerking abnormally. There was an abnormal flickering sound coming from the vehicle. The vehicle was taken to an independent mechanic who retrieved codes related to computer failure. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 101,000.

The car has keyless ignition and was accidentally left on/idling in the garage despite no one in the car and the key fob not present. The car was on for 8.5 hours in the closed garage and filled the house with exhaust, which includes dangerous carbon monoxide fumes, known to be lethal and nearly ended in tragedy. Luckily, my wife woke up for an unrelated reason to check on our daughter and smelled the fumes in the house and found the car running in the garage. Multiple carbon monoxide detectors were in the home and did not go off, so presumably the fumes had not yet reached toxic concentrations by the time the car was turned off. 2 days later, I took the car to the BMW dealership to be inspected for defects and was told by the technician that it was functioning properly and I should assume the engine is running if the keyless ignition button is not turned off. …

Filing regarding NHTSA Recalls 25V-636 and 26V-056. My 2021 BMW X3 M40i (VIN: [redacted] , built September 2020) contains the recall-affected starter part number ending in 997 - confirmed by a BMW Level 1 certified technician - not the non-recall part number ending in 505. BMW denied coverage based solely on manufacture date, with no consideration of the actual components installed. My vehicle displays an active fire risk. On April 30, 2026, my dashboard displayed Engine cannot be started, Starter system fault. Call Roadside Assistance, and Repeat start attempt - all photographed and timestamped. Fault codes 216119, 35AE00, and 8040A9 were confirmed by diagnostic scan. BMW of Catonsville (Work Order [redacted]) attributed the fault to the battery and charged me $280.50. I replaced the battery with a BMW OEM unit on May 13, 2026 at a cost of $590.31. …

My vehicle is subject to an active safety recall (NHTSA #25V-636) issued in September 2025 involving the engine starter. As of today, no remedy has been provided by the manufacturer. Due to the safety risk associated with this recall, I do not feel safe operating the vehicle and have been forced to keep it parked and unused for an extended period of time. This has caused significant financial hardship, as I am still required to make monthly loan payments, maintain insurance, and cover related expenses for a vehicle that is unsafe to drive. The issue has effectively rendered the vehicle unusable. The manufacturer has failed to provide a repair, replacement, or timeline for resolution. This situation places my safety and the safety of others at risk, as the vehicle may fail to start or function properly without warning. …

I was at a stop light and when the light changed I stepped on the gas. The car suddenly turned completely off. I had no steering, no braking no ability to turn the hazard lights on. I was in the middle of the street with traffic behind me and my child was in the back seat with me. The car completely died. There were no warning signs at all Cars started to go around me and I exited the car with my child to avoid getting hit because I could not put my hazard lights. I called my husband and after about 10 minutes I could see the headlights were on. My husband gave me his care and he took my car home but he said the car was acting weird and kept shutting off while on the way back home. then it shut off completely again in our driveway and we cannot close the doors. We are waiting for BMW to pick up the car tomorrow.

The oil pump is exhibiting erratic oil pressure behavior, verified by certified BMW technicians. This behavior has been documented by BMW to indicate that the oil pump can fail without warning, leading to an Uncommanded Loss of Propulsion Angle. The sudden and unexpected loss of power-assisted steering and braking, when the engine stalls in active traffic, can lead to death of the occupants or other drivers that the uncommanded automobile may collide with. Additionally, the thermoplastics in the oil pump component tend to shatter during cold starts, leaving occupants stranded in cold weather, and again, potentially leading to death. BMW is aware of this safety concern but is not offering a remedy at this time.

Intermittent Check Engine Light with the Plug In Hybrid X3 30e since January 2023. Vehicle has been taken back to BMW 2 times and released back to me without permanent fix. Vehicle as of April 2023 is currently held at dealership for 3rd time still without fix. Each check engine light results in a trip back to the dealership service center because we wouldn't know what is the severity of the issue. My safety is put at risk because a normal drive suddenly becomes worrisome and interrupted at random times and we have to attempt to safely pull over to call roadside assistance. Currently in communication with local dealership and have reached out to BMW Customer Relations without response yet.

BMW b58 engines have been having issues with oil pumps, common symptoms are the oil level not being able complete above 20%. Which indicates a failing oil pump upon a lot of research it's a very common issue b58 owners know about, many report having seized engines, low oil pressure warning lights. Lots of complaints have been opened with bmw, with bmws response being to replace oil pump. I have this issue on my car and now have to look into getting the oil pump replaced

Engine complaints in other X3 years