Crankshaft Position Sensor: Service and Repair

Crankshaft position sensor

WARNING: Be very careful as the exhaust pipe from the turbo can become extremely hot.

To remove





1 Remove the manifold's heat shield.
2 Remove the bolt securing the heat shield and sensor.





3 Remove the sensor and O-ring.
4 Trace the sensor's connecting lead and detach the retaining clip from the water pipe.
5 Remove the connector from the holder.
6 Unplug the connector.
7 Change the sensor.

To fit





1 Prepare the sensor so that the wiring runs alongside the water pipe. Change the O-ring as necessary and smear it with motor oil.
2 Spray the connector with Kontakt 61 contact cleaner (part No. 30 21 763), assemble the connector halves and fit same in the holder.
3 Secure the wiring with the retaining clip. Take care to ensure that the wiring is not pinched or damaged by the clip.





4 Press in the sensor and screw it in place with the O-ring fitted together with the heat shield. Check that the O-ring is correctly positioned so that the sensor bottoms in the engine block, as there is otherwise a risk of the sensor's mounting lug breaking off.
5 Apply Molykote 1000 (part No. 30 20 271) or the equivalent to the retaining bolt for the manifold's heat shield and fit the heat shield in place.
6 Start the engine and check for leaks.
Tightening torque 50 Nm (36 lbf ft)