Modern brake pad wear sensors can do more than just warn the driver of a worn brake pad.
The sensor warns you when it’s time for new brake pads. This video is sponsored by Auto Value and Bumper to Bumper.
Almost every Audi for the past 20 years has been equipped with electronic brake pad wear sensors. Most of them mount the brake pad with a clip, but some are molded into the brake pad. These sensors change their electrical resistance as the loop of wire is worn down and eventually breaks as the brake pads wear down.