2021 BMW X5: jerking or lurching

Filed Oct 19, 2026 · Transmission · CA

My 2021 BMW X5 M50i experienced a sudden drivetrain failure at approximately 62,000 miles while my children were in the vehicle. There was no dashboard warning light, Check Control message, or advance alert. I noticed serious mechanical symptoms and immediately pulled over rather than continue driving. I am concerned that continuing to drive could have caused further drivetrain damage or created a dangerous situation for my family and other motorists. The dealer inspected the vehicle. In a written diagnosis dated September 15, 2026, the technician identified the front differential pinion bearing as the initial point of failure. He stated that the failed bearing damaged the pinion seal, causing differential fluid loss, and that play in the bearing allowed the driveshaft to contact the oil pan. BMW recommended replacing the front differential and driveshaft and separately recommended oil-pan replacement. When asked about external causes, the technician stated, "No external damage was found." Asked whether similar failures had been seen, he responded, "Yes, we have seen this failure occasionally." I previously reported unusual dragging/jerking behavior to BMW and followed its recommendations involving the transfer case and control/thrust arms. It is unknown whether those earlier symptoms were related. The vehicle received regular BMW maintenance, with no skipped required services. I have also identified multiple public owner reports of front differential failures involving 2021 BMW X5 M50i (G05) vehicles, some at considerably lower mileage. These reports are not independently verified however additional complaints have been filed with the federal safety agency. I request that the federal safety agency investigate whether this represents a recurring safety defect, especially given the sudden failure absence of warning and low mileage to have such an instrumental piece of equipment fail. The vehicle was inspected by an authorized BMW dealer; availability of failed parts for inspection is unknown.

Filed Oct 7, 2026 · Transmission · NJ

Description of Safety Concern: I am writing to formally submit a vehicle safety complaint regarding the xDrive transfer case on my 2021 BMW X5. While driving, the vehicle exhibits noticeable hesitation, shuddering, and jerking during acceleration at lower speeds and when executing tight turns. This erratic power delivery creates a potential safety hazard, particularly when accelerating into traffic, merging onto highways, or pulling out from intersections, as the momentary loss of predictable drivetrain response increases the risk of a collision. Despite internal technical bulletins from the manufacturer (SI B27 02 20) acknowledging shuddering caused by transfer case clutch breakdown, no official safety recall has been issued. I request that the federal safety agency open an investigation into these xDrive transfer case failures to evaluate the safety risks posed by drivetrain hesitation and potential sudden power loss. Thank you for your attention to this safety issue.

Filed Aug 20, 2026 · Brakes, Driver assistance · NV

We live in [XXX]. We own a 2021 BMW X5-45e. It has about 85,000 miles and has always been serviced by the BMW dealer here in [XXX] – Pierce BMW. On the evening of XXX I drove the vehicle home at 6:30PM after a 30 mile drive and parked the car outside in the shade of our house. The temperature at the time was approx. 95 degrees F. At 6:45PM we left the house and drove on the freeway and city streets of [XXX] about 8-10 miles to see a concert in downtown [XXX]. The temperature at that time was about 90-92 F. There was no wind. We then parked outside the venue for about an hour and watched the concert. We came out of the concert at about 8:30 and started the car. I drove about 200 feet to the corner and stepped on the brake. As the car slowly came to a stop the emergency/parking brake suddenly engaged at about 2-3 miles per hour. The car jerked to a very sudden and violent stop. To get the car going, I had to disengage the parking brake which was on with the indicated brake light. The engine was still on and there were no warning lights flashing. I turned the corner and accelerated again to about 15 miles per hour and touched the brakes to bring the car to a stop. The same thing happened. The car jerked to a sudden stop. To get the car going, I had to disengage the parking brake. The engine was still on and there were no warning lights flashing. It also happened a third time. That time, my elderly wife complained of pain in her back. After the third time, I turned the engine off and waited about one minute. I then restarted the car and drove it home with no problems. We have had no further issues, but this is a big concern as we no longer trust the car to perform as expected. This is a very worrisome issue and would like some answers, but apparently none are forthcoming. I took the car to Pierce BMW and they could find no fault code or problem. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 15, 2023 · Airbags, Body · CA · crash

In a parking garage I found a open space and slowly moving towards that to park, car was approaching space at about 10 ft from that, all of a sudden car accelerated and lurched forward and hit the parking structure wall. Airbags deployed for all three of us, one of my colleagues was in passenger seat, another in the back seat. There was no warning on no time to react, this happens in seconds.

Filed Feb 10, 2022 · Driver assistance · CA

I was driving in the left lane of the freeway, and there was a k-rail to the left of the lane, because there was construction in the shoulder. At one point, there was a break in the k-rail, where it had an opening, and went away from the lane, then back about 20 ft later. The lane departure system jerked the wheel to the left, attempting to steer out of the lane; if I had not held the wheel steady, it would have steered the vehicle directly into the k-rail as it rejoined the side of the lane.

Filed Feb 1, 2022 · Acceleration, Engine · 14,000 miles · MA

The contact owns a 2021 BMW X5. The contact stated that as her husband was stopped at a stop light, the vehicle began to rev after he had taken his foot off the brake pedal without warning. Once her husband placed his foot back on the brake pedal, the revving stopped, and her husband was able to resume normal driving. On a separate occasion, her husband was waiting for a vehicle to move out of a parking spot; the same failure occurred as her husband took his foot off the brake pedal. Her husband was forced to slam on the brakes as the engine continued to rev and the vehicle lurched forward. The contact who was seated in the passenger’s seat, shut off the vehicle to avoid hitting the vehicle in front. Her husband restarted the vehicle and drove it home; he then had the vehicle towed to the dealer the next day. The dealer inspected the vehicle but could not duplicate the failure. The service tech was not satisfied with the results and decided to call the manufacturer to approve more testing of the vehicle. The vehicle had yet to be repaired and remained in the possession of the dealer. The failure mileage was approximately 14,000. The VIN was not available.

Filed Jul 13, 2021 · Electrical, Engine · CA

Vehicle was being driven and showed power supply issue and then flashed a drive train warning and lost propulsion power. The vehicle started hopping / jerking. The A/C stopped working and the center console became intensely hot to the touch; so much so it was uncomfortable to keep you hand on the center console. The vehicle is currently at the dealership stating they believe a software update was needed. The issues mirror those that occurred when the car failed as a result of a previous EV battery recall. Issue concerns me as the intense heat created makes me concern about of potential electrical fire or failure when driving at higher speeds. Occurred on July 10, 2021.

Filed Jun 24, 2021 · Brakes · 9,700 miles · PA

The contact owns a 2021 BMW X5. The contact stated while reversing out of their driveway and making a right turn, the display screen on the center console went red. The contact depressed the brake pedal and the pedal went all the way to the floor. The contact took their foot off the brake pedal and depress on the accelerator pedal, when the contact noticed the display screen showed the vehicle went from hybrid mode to sports mode on it's own. The driver had to press the hybrid button to get the vehicle back to normal. However, the next day the contact was driving at an undisclosed speed and approaching a red light when they depressed the brake pedal the vehicle jerked to a stop. The contact then depressed the accelerator pedal but the vehicle would not move. The contact waited a few moments and depressed the accelerator pedal again this time the vehicle was slowly moving forward. The contact was able to pull over to the side of the road. The vehicle was towed to a local dealer who inspected the vehicle but was not able to duplicate the failure. However, they stated that the failure was related to the brake system and replaced the master cylinder. Although, the vehicle was repaired the contact was concerned that the dealer could not provide the reason the failure occurred on the vehicle. The manufacturer was made aware of the failure. The failure mileage was 9,700.