I have a 2003 BMW 330d sport and know which rear parking sensor is faulty, but not sure how to replace it.
Any Advice??
Put car into reverse with ignition on (not running) and either listen very closely or feel each sensor with your finger tips, you should hear a clicking noise or feel a ticking on the good sensors. once you have determined the faulty one simply release the two plastic retaining clips and push the sensor through the bumper inwards, then remove plug and fit new sensor
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