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How to change lambda sensor on Mercedes W203 – replacement guide
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Recommended replacement interval for the part category Lambda sensor : 100000 km
Important!
This replacement procedure can be used for:
MERCEDES-BENZ C-Class Saloon (W203) C 180 (203.035), MERCEDES-BENZ C-Class Saloon (W203) C 200 Kompressor (203.045), MERCEDES-BENZ C-Class Saloon (W203) C 320 (203.064), MERCEDES-BENZ C-Class Saloon (W203) C 32 AMG Kompressor (203.065), MERCEDES-BENZ C-Class Saloon (W203) C 55 AMG (203.076) … View more
The steps may slightly vary depending on the car design.
MERCEDES-BENZ C-Class Saloon (W203) C 180 (203.035), MERCEDES-BENZ C-Class Saloon (W203) C 200 Kompressor (203.045), MERCEDES-BENZ C-Class Saloon (W203) C 320 (203.064), MERCEDES-BENZ C-Class Saloon (W203) C 32 AMG Kompressor (203.065), MERCEDES-BENZ C-Class Saloon (W203) C 55 AMG (203.076) … View more
The steps may slightly vary depending on the car design.
How to change lambda sensor on MERCEDES-BENZ W203 C-Class [TUTORIAL AUTODOC]

All the parts you need to replace – Lambda Sensor for C-Class Saloon (W203) and other MERCEDES-BENZ models
Alternative products

Wire brush
WD-40 spray
Electronic spray
High-temperature ceramic grease
Torque wrench
Combination spanner #22
Drive socket # 8
22-mm oxygen sensor socket
Ratchet wrench
Thread tap
Fender cover
Replacement: lambda sensor – Mercedes W203. AUTODOC experts recommend:
- After replacing the oxygen sensor, clear the trouble code from the electronic control unit and let the ECU adapt itself to the new sensor.
- All work should be done with the engine stopped.
Replacement: lambda sensor – Mercedes W203. Recommended sequence of steps:
- Step 1Before getting down to work, start the engine and let it warm up to operating temperature.Step 2
Open the bonnet. - Step 3Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.Step 4Shut off the engine.Step 5
Lift the car using a jack or place it over an inspection pit. - Step 6
Undo the fasteners of the oil pan lower cover. Use a drive socket #8. Use a ratchet wrench. - Step 7
Remove the oil pan cover. - Step 8
Detach the oxygen sensor connector. - Step 9
Clean the oxygen sensor fastener. Use a wire brush. Use WD-40 spray. - Step 10
Unscrew the oxygen sensor fastener. Use a 22-mm oxygen sensor socket. Use a ratchet wrench. - Step 11
Remove the oxygen sensor. - Step 12
Cut the thread for the new oxygen sensor. Use a thread tap. Use a ratchet wrench. - Step 13
Treat the oxygen sensor. Use high-temperature ceramic grease. - Step 14
Install the new oxygen sensor.
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