Thread: brake pad warning sender unit

The bump on the plastic gets worn through when it touches the disc, breaking the circuit between the 2 wires. The clip is just to make the sensor stay on the brake pad.

Hi Peter,

If the sensor bump makes contact with the brake rotor, this breaks the circuit and activates the warning lamp.

Usually you'd replace pads and the brake sensors at the same time, they're about $25 each and there's one on the front left and one on the rear right if I remember correctly. The leads plug into a connector fitted near one of the suspension arms, just plug and play.

If the rotors aren't worn beyond their specified wear limits, you can get the rotors remachined, about $30 each. It's a waste of money fitting new pads to worn rotors, as the new pads will wear out twice as fast.

So, new brake pads, new or remachined rotors and new brake sensor leads are the go.

Hope this helps

Eric

I just replaced front rotors and pads yesterday and sensor lead was still good but light is still on.

A hard reset or clearing all codes if you have the gear to do that should fix that is there are no issues.

My light came on just after the pads were changed as well as the sensor wire. The garage had put in aftermarket parts and it has been said that the sensor wire may not seat properly where it connects to the wiring loom behind the plastic inner wheel arch liner. No amount of fault clearing would turn the light off.