When to replace the Lambda Sensor on your AUDI A5
Recommended replacement interval for the part category Lambda sensor : 100000 km
Important!
This replacement procedure can be used for:
AUDI A5 Coupe (8T3) 1.8 TFSI, AUDI A5 Coupe (8T3) 1.8 TFSI, AUDI A5 Coupe (8T3) 2.0 TFSI quattro, AUDI A5 Coupe (8T3) 2.0 TFSI, AUDI A5 Coupe (8T3) 2.0 TFSI, AUDI A5 Coupe (8T3) S5 quattro, AUDI A5 Coupe (8T3) 1.8 TFSI View more

The steps may slightly vary depending on the car design.

This video shows the replacement procedure of a similar car part on another vehicle

All the parts you need to replace – Lambda Sensor for A5 Coupe (8T3) and other AUDI models
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Lambda sensor
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Lambda sensor
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Socket, lambda probe
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Socket, lambda probe
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Socket, lambda sensor
Tools
Replacement: lambda sensor – AUDI A5 (8T3). Tools you might need:
Electronic spray
High-temperature ceramic grease
Torque wrench
Drive socket # 10
22-mm oxygen sensor socket
Ratchet wrench
Thread tap
Fender cover
Replacement: lambda sensor – AUDI A5 (8T3). 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.
  • Before getting down to work, start the engine and let it warm up to operating temperature.
  • Please note: all work on the car – AUDI A5 (8T3) – should be done with the engine switched off.
Carry out replacement in the following order:
  1. Step 1
    Open the bonnet.
    Step 2
    Use a fender protection cover to prevent damaging paintwork and plastic parts of the car.
    Step 3
    Lift the car using a jack or place it over an inspection pit.
    Step 4
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    Unscrew the fasteners of the oxygen sensor housing cover. Use a drive socket #10. Use a ratchet wrench.
  2. Step 5
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    Remove the oxygen sensor housing cover.
  3. Step 6
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    Detach the oxygen sensor connector.
  4. Step 7
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    Unscrew the oxygen sensor fastener. Use a 22-mm oxygen sensor socket. Use a ratchet wrench.
  5. Step 8
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    Remove the oxygen sensor.
  6. Step 9
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    Cut the thread for the new oxygen sensor. Use a thread tap. Use a ratchet wrench.
  7. Step 10
    Treat the oxygen sensor. Use high-temperature ceramic grease.
    Step 11
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    Install the new oxygen sensor.
  8. Step 12
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    Tighten the oxygen sensor fastener. Use a 22-mm oxygen sensor socket. Use a torque wrench. Tighten it to 37 Nm torque.
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DIY AUDI A5 Coupe (8T3) Lambda Sensor replacement - online guide
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