Engine - Coolant Temperature Sensor/Switch: Service and Repair

Engine Coolant Temperature Sensor (G62)

Removing

• Engine is cold.

- Remove the cover for the air guide; disengage the side clips to do so - arrows -.





- Unclip the lower air guide, disengage the clips to do so - arrows -.





- Remove the lower air guide together with the air guide hose.

Vehicles with a Noise Generator:

- Remove the charge air pipe from the noise generator. Refer to => [ Charge Air Pipe from Noise Generator ] Charge Air Pipe from Noise Generator.

Continuation for All:





- Loosen the hose clamp - 2 -.

- Remove the bolt - 4 -.

- Disconnect the electrical connector - arrow -.

- Remove the noise insulation.

- Remove the charge air hose clamps - items 1 and 2 - and hose and seal the charge air cooler with a clean cloth.





- Remove the bolt - 1 - and remove the charge air pipe downward.





- Disconnect the electrical connector - 1 - from the throttle valve control module (J338).





- Remove the bolts - arrows - and remove the throttle valve control module.

- Remove the intake manifold support; to do so, remove the nut - 2 - and bolt - 1 -.





Engine Coolant Temperature (ECT) Sensor with Clip:





- Disconnect the electrical connector - 1 - from the ECT sensor.

- Disengage the clip, to do so, press the latches - arrow -.

- Remove the ECT sensor.

• Install the new ECT sensor with an O-ring as quickly as possible to prevent coolant from leaking out.

ECT Sensor with a Retaining Plate:





- Disconnect the electrical connector - 2 - from the ECT sensor.

- Remove the bolts - arrows - and remove the retaining plate - 1 -.

- Remove the ECT sensor.

• Install the new ECT sensor with an O-ring as quickly as possible to prevent coolant from leaking out.

Installing

Installation is performed in reverse order of removal, noting the following:

• Replace the O-ring.

• Check the coolant level.