When driving and after using brakes, the brakes do not let off, they drag. I was driving on the highway, and had to slow down for traffic and the car would not accelerate.This happened several times and I brought it to a BMW repair shop. They diagnosed it to be the ABS pump, replaced it with a used one and I have not had any problems since. I have researched this issue and found others with like make & model have had similar problems. Since this could cause the vehicle to slow down without actually braking, I worry about someone hitting the car from the back because the brake lights don't come on when this happens.