Originally Posted by Mike Benvo
The tune is 100% transparent to the dealership computers, and they will not be able to tell that the vehicle is tuned. It allows for seamless integration with their factory systems for service and diagnostics as well. (Please note that BMW will be able to see raised RPM or Speed Limits, however, the dealer can not).
Will BMW always be able to see the raised RPM and speed limits even if I flash the car back to stock before taking it into the dealer? If I kept the OEM RPM and speed limits would BMW still be able to see the tune?