E46 Phantom Brake Warning Light

[dr_gn]

All,

E46 330i Sport, 2002, 147k miles.

Pad warning light came on the other day. I looked at all the pads, and the rears looked a bit iffy, so I bought a new axle set and a new sensor.

Removed the pads to find the sensor untouched, and the pads maybe only 2/3 worn. Replaced everything anyway.

Checked the fronts and they are all fine. Also checked the front sensor and plug connection - all looked sound.

Reset the warning light, but after about 100 yards, the lights on again.

Any ideas? Replace the front sensor as a precaution?

Are the sensors two copper wires that make a circuit with the disc when the plastic moulding wears off, or are they a magnetic proximity sensor?

cheers.

[Krikkit]

Sensor is the wear-away type so they conduct through the disc. I'd check the front sensor and see if that's the issue.

[pmorg4]

If you still have your old sensor, cut off the sensor and join the two wires. You can then plug it into the socket for the front sensor as a way of testing whether the front sensor is the issue.

[dr_gn]

Thanks guys. I've ended up with a spare rear sensor in stock, so I might plug that into the front and see what happens.