Removing the actuator for the exhaust flap, right

NOTE: Description is for left component only. Procedure on the right side is identical.

Remove the actuator for the exhaust flap

Unlock the plug connection (1).
Disconnect the connector (1) of the exhaust flap (2).

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Loosen screws (1).
Remove the controller drive for the exhaust flap (2).

Courtesy of BMW OF NORTH AMERICA, INC.