What are the symptoms of a faulty BMW wheel speed sensor?

[OElle]

There may be unstable engine idling; momentary stalling or engine shutdown may occur when starting the vehicle or decelerating to a stop while driving. Here are some related solutions: 1. External force damaging the wheel speed sensor wiring harness: For models manufactured before 2011, the wheel speed sensor wiring harness did not have extra length reserved, which often led to the harness being torn when the steering wheel was turned to its limit. The issue can be resolved by modifying the wheel speed sensor bracket to create extra length for the wiring harness, preventing future damage after replacement. 2. False damage: Dirt on the sensor head or contamination by magnetic materials can cause the wheel speed sensor to malfunction. If the wheel speed sensor frequently fails after driving through water, mud, sand, or similar conditions, it is likely due to dirt buildup and can be cleaned.