After speaking to a BMW tech, when you bring in the BMW 135 and 335 in for service, they check the ecu. I've also read confirmation of this at :http://www.1addicts.com/forums/showthread.php?t=7967 Unlike earlier cars, this can be seen immediately and if they are found, your VIN is flagged. Any engine/drivetrain/whatever issues that come up with the car will probably be denied warranty coverage. Are all cars going this way?