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 (S54)
Interrogate fault memory of DME control unit.
Switch off ignition.
Remove intake air manifold. Refer to 11 61 050 REMOVING AND INSTALLING INTAKE AIR MANIFOLD (S54) .
Unlock plug (1) and detach from idle-speed control valve.
Unlock plug (2) and detach from temperature sensor (3).
Unscrew temperature sensor (3).
Tightening torque, refer to 13 62 2AZ in FUEL SYSTEM - TIGHTENING TORQUES .
Installation:
Check coolant level, top up coolant if necessary.
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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.