Remove sealing lips at marked points.
Unclip line and water hose (1) from cover (3).
Unlock retaining lug (2).
Feed out cover (3).
Cover tabs (1) must snap in correctly under cowl panel.
BMW X3 Service & Repair Manual > Electronic switching or control units: Removing/replacing knock sensor (1st and 2nd cylinder) (N20, N26)
Necessary preliminary tasks:
Read out the fault memory of the DME control unit.
Switch off ignition.
Remove THROTTLE VALVE ASSEMBLY .
Unlock connector (1) and remove.
Release bolt (2) on knock sensor.
Remove knock sensor for 1st and 2nd cylinder.
Installation note:
Clean contact sur ...