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What Causes BMW Cruise Control Failure?

2 Answers

VonMariana

07/28/25 11:13pm

BMW cruise control failure can be attributed to the following reasons: 1. ACC sensor malfunction: Damaged ACC sensor, dirty ACC sensor, damaged plastic cover in front of the ACC sensor, or external interference with the ACC sensor's radar signal. 2. Control unit internal or wiring failure: If there is an issue within the control unit or a fault in the connecting wiring, the signal cannot be transmitted. 3. Wheel speed sensor: If the cruise control system failure warning appears alongside alerts related to DSC, ABS, or RPA, it is highly likely due to poor performance of the wheel speed sensor.

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McSteven

08/12/25 3:37am

Last time my BMW's cruise control suddenly stopped working, I suspect it's the wheel speed sensor acting up. This thing sits near the wheels, specifically measuring speed. If it gets dirty or damaged, the signals go haywire, making cruise control completely unusable. The control module might also go berserk - internal components aging or voltage instability can cause malfunctions. My friend once had a blown fuse situation; just check the headlight fuse box and replace it. The brake light switch failure is another troublemaker - poor contact when braking automatically cancels cruise. For aged wiring or loose connectors, you'll need to check them one by one. Software issues are even more troublesome - often solved by upgrading the infotainment system or visiting the dealership for a reprogram. Don't delay, cruise failure is especially dangerous on highways. When it stops, pull over immediately to troubleshoot safely.

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