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How to change rear brake pad wear sensor on BMW 3 Compact (E46) – replacement guide
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Recommended replacement interval for the part category Sensor, brake pad wear : 30000 km
Important!
This replacement procedure can be used for:
BMW 3 Compact (E46) 318 td, BMW 3 Compact (E46) 320 td, BMW 3 Compact (E46) 318 ti, BMW 3 Compact (E46) 325ti, BMW 3 Compact (E46) 316 ti … View more
The steps may slightly vary depending on the car design.
BMW 3 Compact (E46) 318 td, BMW 3 Compact (E46) 320 td, BMW 3 Compact (E46) 318 ti, BMW 3 Compact (E46) 325ti, BMW 3 Compact (E46) 316 ti … View more
The steps may slightly vary depending on the car design.
This video shows the replacement procedure of a similar car part on another vehicle
All the parts you need to replace – Brake Pad Wear Sensor for 3 Compact (E46) and other BMW models
Sensor, brake pad wear
Alternative products

Wire brush
Brake cleaner
Electronic spray
Copper grease
Torque wrench
Wheel impact socket #17
Round-nose pliers
Wheel chock
Replacement: brake pad wear sensor – BMW 3 Compact (E46). AUTODOC experts recommend:
- The replacement procedure is identical for both brake pad wear sensors on the same axle.
- Please note: all work on the car – BMW 3 Compact (E46) – should be done with the engine switched off.
Carry out replacement in the following order:
- Step 1Open the bonnet. Unscrew the brake fluid reservoir cap.Step 2Secure the wheels with chocks.Step 3Loosen the wheel mounting bolts. Use wheel impact socket #17.
- Step 4Lift the car using a jack or place it over an inspection pit.Step 5Unscrew the wheel bolts.AUTODOC recommends:Warning! To avoid injury, hold the wheel while unscrewing the fastening bolts. BMW 3 Compact (E46)
- Step 6Remove the wheel.
- Step 7Remove the brake pad wear sensor from the brake pad. Use round-nose pliers.
- Step 8Disconnect the brake pad wear sensor wire.Step 9Open the cover of the wiring housing.
- Step 10Detach the connector of the brake pad wear sensor.
- Step 11Install the wear sensor on the brake pads. Use round-nose pliers.
- Step 12Connect the brake pad wear sensor wire.
- Step 13Treat the brake pad wear sensor plug. Use dielectric grease.
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