BMW E46 3 SERIES & Z4. Front + Rear BRAKE PAD WEAR INDICATOR SENSORS SET for BMW E46 325Xi 330Xi 330i. Brake Pad Wear Sensor / Indicator Set. FRONT +REAR. (1 Front Sensor + 1 Rear Sensor). BRAKE PAD WEAR SENSORS FRONT REAR PAIR for BMW E90 E91 E92 325Xi 328Xi 330xi.