Release the air hoses from the mountings on the charge air pipe. Disconnect connector -1-. Unfasten retainers -arrows- and remove charge air pipe.
Loosen clamps -arrows- and remove air duct -1-.
Disconnect connector -3-. Remove screws -arrows- and remove throttle valve unit -J338- -1- with adapter -2-.
Installation
Installation in reverse order. After replacing the throttle valve unit -J338-, it must be adapted again to the engine control unit -J623-.