A device that defeats the exhaust valve if you disconnect it from the servo motor and lets the ecu think the valve still is connected, so you get no error code on dash.
no you fit it yourself, preferably before the valve seizes and leaves you with a strangled engine which is what happened to mine, though my dealer took the exhaust flap away for me whilst still under warranty.
When I. Did my winter cleaning and maintenance. I gave it a clean and good lubrication, so I'd like to think it will be ok.
