Remove the intake air pipe.
Remove intake air silencer.
Disconnect plug of throttle-valve actuator (4).
Remove the fasteners securing the throttle-valve actuator (arrow).
Remove the throttle vale actuator.
Check the O-ring for damage.
Clean the threads.
Installation is the reverse of the removal procedure: pay particular attention to the following.
Coat threads of fasteners with Loctite 243.
Tightening torque:
- Throttle-valve actuator to throttle flap stub (clean threads + Loctite 243): 5 Nm