just bought a new to me m3 smg with 10k miles . had the car for less than 3 weeks and the smg trans light on the dash came on while on a drive . called dealer and they said bring her in . car drove fine and went in yesterday morning and just got her back today . Problem according to bmw was a "acceleration sensor" , which would cause what ? not sure because i have only drove one smg ( mine ) and it drove fine . I did not notice anything on the drive home so ? not sure what the issue was, has anyone out there had this issue and know what it does besides cause your car to disappear to bmw for 2 days ? looked at the service bill and it stated that they had to remove the passenger seat and the rocker panel to get to the sucker ( nice spot !) . Just a fyi.