13 62 531 Replacing coolant temperature sensor (N54)

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Danger of scalding!
Only perform these tasks on an engine that has cooled down.

Recycling

Catch and dispose of escaping oil and coolant.

Observe country-specific waste-disposal regulations.

Necessary preliminary tasks:

Read out fault memory of DME control unit
Switch off ignition
Remove acoustic cover . See 11 00 REMOVING AND INSTALLING/REPLACING IGNITION COIL COVER (N54) .
Remove fan cowl . See 17 11 035 REMOVING AND INSTALLING/REPLACING FAN COWL WITH ELECTRIC FAN (N54) .

NOTE: Coolant temperature sensor is mounted on cylinder head at front.

Release screw.

Tightening torque, see 17 21 1AZ .

Disconnect oil line (1).

Catch and dispose of emerging fluid.

Fig 1: Locating Oil Line

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Installation:

Replace sealing rings.

Fig 2: Locating Sealing Rings

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Unlock plug (1) and remove.

Release temperature sensor (2).

Installation:

Tightening torque, see 13 62 1AZ .

If necessary, top up coolant .

Check cooling system for leaks. See 17 00 009 CHECKING COOLING SYSTEM FOR WATER LEAKS .

Fig 3: Identifying Plug And Temperature Sensor

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NOTE: After completion of work, check engine oil level.
Check stored fault messages.
Now clear the fault memory.