12 62 500 Replacing coolant temperature sensor (N14)

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

IMPORTANT: Gaiter and charge-air hoses with clamp fastenings must be installed dry and free from grease!
Sealing faces and fittings must be dry and free from grease.
If gaiter and charge-air hoses with clamp fastenings are not installed dry and free from grease, this may result in turbocharger failure!

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 coolant temperature sensor is being replaced. Catch and dispose of coolant.

Release clamps (2).

Remove rubber gaiter (3).

Remove intake pipe (4).

Installation:

Install gaiter (3) dry and free from grease.

Fitting on turbocharger must be dry and free from grease.

Fig 1: Identifying Charge-Air Duct, Intake Pipe, Gaiter And Clamps

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and detach plugs (1 and 3).

Unlock and disconnect line (2).

Carefully pull cable duct (4) upwards slightly.

Fig 2: Pulling Cable Duct Upwards

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock plug (1) and remove.

Detach lock (2) and remove coolant temperature sensor (3).

Installation:

Fig 3: Removing Coolant Temperature Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Now clear the fault memory.