Engine revved uncontrollably without my foot on the gas pedal, I was forced to shut the engine off. The car behaved normally once the engine was restarted: I was turning left into a parking space in a parking lot at a very slow speed. My foot was off the gas pedal as I was braking and coming to a stop. Suddenly (with foot still on the brake and not the gas pedal) the engine revved to a high RPM which lurched the car forward a bit. Since I was already braking, I was able to react quickly and press down even harder on the brake pedal, which stopped the vehicle and kept it in place. The engine continued to rev and I shifted into park. The engine stayed revved at very high rpms as if I was flooring the gas pedal, even though I could look down and confirm that my foot was only on the brake. At this point I shut off the engine and waited several minutes. I checked the floor mat and confirmed that it was not out of place or affecting the pedals in any way. I then started the engine again and the car idled normally with no issues. I tested driving at a slow speed and pulled into several more parking spots to see if the issue would reoccur, but it did not. I drove home normally and parked without further problems, and will be taking the car to a mechanic as soon a possible.

- Los Angeles, CA, USA

I was driving with an adult passenger on June 1, 2018 at approximately 3 pm on a public street, traveling straight at approx 40 mph. Conditions were dry and sunny. I pressed the brake at a stop light and the car stopped for a brief second and then lunged forward while the brake was still depressed. I put both feet on the brake and pushed hard to the floor. The car continued forward several feet and slowed to a stop. The engine was revving while I tried to stop and my passenger stated that the rpms increased rapidly. No warning lights came on or engine warning. I was approx 2 miles from the BMW dealership so I slowly drove my car there, putting it in neutral each time I had to stop. I explained the situation, they reviewed the car and found nothing wrong. The car has a history of idling high/fast, which I also relayed to the dealership. There were no obstructions near or under the brake pedal and I did not accidentally step on the gas. I am canceling my lease tomorrow.

- Nolensville, TN, USA

I was turning into a parking space when the car accelerated over the parking barrier and crashed into a post.

- Fort Lauderdale, FL, USA

This car was purchased new with the optional "active cruise control" (acc). Under certain conditions the car accelerates unexpectedly. When the brakes are applied by the driver, the acc engagement should always be terminated. In certain situations the acc remains engaged despite the driver's use of the brakes. When the acc is engaged and detects an object ahead, the brakes may be applied automatically by the acc. If, while the brakes are still be applied by the acc and the driver also presses the brake pedal, the acc should be disengaged and remain off. However, if the object previously detected ahead has cleared and the driver releases the brakes, the acc control is restored and the car accelerates. This is a dangerous and confusing response. Drivers instinctively expect any cruise control to disengage immediately and remain disengaged upon brake application.the BMW active cruise control does not perform this way in the situation described. This acc response is a repeatable defect that has caused me to experience a hazardous situation while driving.

- Minneapolis, MN, USA

This vehicle suddenly shut off in the middle of the intersection. The entire car shut off and would not start again. You could not put the car in neutral either to get it off the road. The car would not move. This vehicle was on a 6 lane road starting to go from the intersection. I know this has happened to another person with an X3 as well. BMW is claiming this doesn't happen. I was driving a ralph schomp BMW loaner at the time because my 2017 X3 was in the shop. I have the other person's information should you need it. This is a huge safety issue. The other person this happened to was on a highway when it happened. It is unknown to me what caused this, but the vehicle flashed lights and told me to turn off the car. When I did, it would not start again. I am concerned that BMW is hiding this problem since I know the same dealership has had this issue before with the same vehicle. People need to be aware of this issue. Thank you.

- Aurora, CO, USA