Coolant Temperature Sensor/Switch (For Computer): Service and Repair

12 62 500 Replacing Coolant Temperature Sensor (N12)







WARNING:
Danger of scalding.
Only carry out work on the cooling system after the engine has cooled down.







Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Check stored fault messages
- Switch off ignition







Installation location:
On cylinder head, left.
Coolant can escape when temperature sensor is being replaced. Catch and dispose of coolant.







Release screw.
Pull intake muffler (1) towards top and detach clean air pipe (2).
Detach intake muffler (1) from air filter housing and remove.
Remove clean air pipe.







Unlock and detach plugs (1 and 2).
Unlock and disconnect line (3).
Carefully pull cable duct (4) upwards slightly.







Unlock plug (1) and remove.
Detach lock (2) and remove temperature sensor (3).

Installation:
- Replace sealing ring
- If necessary, add coolant
- Check cooling system for water leaks







NOTE: Now clear the fault memory.