BMW, VW/Audi and Mercedes use brake pad wear sensors. How do you tell if a sensor is defective or worn?
Before you throw out the old brake pads or order a new set, take a good look at them. This video is sponsored by ADVICS.
When replacing brake pads it is essential that you also replace the wear sensors too. Typically, the part that fails is the connector itself. Andrew Markel explains how this works and why it is so important to remember on your next brake job.