One problem related to software has been reported for the 2010 BMW 535. The most recently reported issues are listed below.
Within two weeks of taking ownership of this car, I experienced a series of faults in the system where the car froze up and had to be towed to the dealer for repair. Over the past two years, the car has experienced a variety of malfunctions in the electronic warning system. On 5/22/12, upon leaving my residence, I lost momentary control of the car. The car stopped, jerked and then I hit a curb and when I righted the car, I pressed down on the brake pedal, but the car accellerated to a high speed. I travelled approximately 100' to where there were three cars and one motorcycle stopped at a red light. I was unable to stop the car and hit the driver of the motor cycle at a high speed. The car was repaired with nearly $25,000 in damage. The following morning after I had received the car, and during a cold start, the car did the same thing again. It "jerked" the wheel turned and this time I righted the car. Over the next few days, the car did it again several times. One week later when I was driving it (again a cold start and within 1/2 mile of my home garage), the car did the "jerking" movement and I temporarily lost control of the car. I immediately pulled over and called BMW to report the situation and have the car towed. I was told that it was a fault in the car's software system. BMW had the car at its shop for 10 days, returned it to me and I've not experienced the malfunction since.