BMW E60 parking sensor fault
Why do the E60's parking sensors beep for no reason?
Often the cause is a broken wiring harness. At the rear the harness can get pinched between the frame beam and the body, and at the front the wiring bundle can chafe on the edge of the horn under the headlight. Cheap aftermarket sensors also start to beep easily in cold and damp conditions.
How do you find out which parking sensor is faulty?
A diagnostic tool shows right away which sensor is dead, so no guessing is needed. Read the fault codes first. The PDC button light should stay on continuously when the system works.
Where do you check the front wiring?
The front wiring is checked by removing the passenger-side headlight. The harness connector can also be reached without removing the bumper by removing the blanking cover. At the rear, the outer connector is behind the rear bumper in the right corner.
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