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.
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HOMESERVICE MANUALSBMW2004325CI CONVERTIBLE (E46) L6-2.5L (M56)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSSENSORS AND SWITCHES - COMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)SERVICE AND REPAIR
2004 BMW 325Ci Convertible (E46) L6-2.5L (M56)
Coolant Temperature Sensor/Switch (For Computer): Service and Repair
2004 BMW 325Ci Convertible (E46) L6-2.5L (M56)SECTION Service and Repair
Replacing Coolant Temperature Sensor (S54)
Interrogate fault memory of DME control unit.
Switch off ignition.
Remove intake air manifold.
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, Coolant temperature sensor 13 Nm.
Installation Note: Check coolant level, top up coolant if necessary.
NOTE:
Interrogate fault memory of DME control unit.
Check stored fault messages.
Rectify faults.
Then clear fault memory.
RENDER: 1.0x
NO RELATED
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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.