Replacing Both Control Sensors (M54)

11 78 513 - Replacing both control sensors (M54)





Special tools required:
- 11 7 020 11 7 020 Socket Wrench Socket WAF 22





Necessary preliminary tasks:
- Read out fault memory of DME control unit
- Switch off ignition





Warning!
Scalding hazard!
Only perform this task on an engine that has cooled down.





Unclip plug connection (1) and disconnect.
Release both oxygen sensors (2) with special tool 11 7 020 11 7 020 Socket Wrench Socket WAF 22.





Installation Note:
Threads of new oxygen sensors are already coated with Never Seez compound.
If an oxygen sensor is reused, only apply a thin and uniform coat of Never Seez compound (refer to BMW Parts Service) to thread.
Oxygen sensor section projecting into exhaust system must not be cleaned or come into contact with lubricant.
Pay attention to cable routing for oxygen sensors.
Use special tool 11 7 020 11 7 020 Socket Wrench Socket WAF 22 to tighten down oxygen sensor.
Tightening torque, 11 78 1AZ 11 78 Emissions-Control, Lambda Oxygen Sensor.
Cover oxygen sensors when applying underseal.





Installation:
Check stored fault messages.
Now clear the fault memory.