Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
13 62 531 Replacing coolant temperature sensor (N54)
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) .
Release screw.
Tightening torque, see 17 21 1AZ .
Disconnect oil line (1).
Catch and dispose of emerging fluid.
Installation:
Replace sealing rings.
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 .
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.