Air Flow Meter/Sensor: Service and Repair

Removing and installing/replacing air-mass flow sensor (M54)

Necessary preliminary tasks:
- Interrogate fault memory of DME control unit.
- Switch off ignition.
- Remove upper section of intake filter housing.







Unlock plug (1) and remove.
Loosen hose clamp.
Pull air-mass flow sensor (2) out of intake hose.


Installation:







Check sealing ring (1) between air-mass flow sensor and intake filter housing for damage, replace if necessary.
Coat sealing ring (1) with antiseize agent.


Installation:







Arrow on air-mass flow sensor indicates direction of air flow.
Install air-mass flow sensor between intake filter housing and intake hose so that arrow points in direction of intake hose.


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