First smog check on my 04 545i. After half hour of waiting the technician came to tell me that his computer had error communicating with my car :confused: and recommended me to try another shop. Went to the 2nd shop. Same problem, "no response" communicating to OBD II board. :wacko: My stomach started to hurt as it could be very costly if there was a electrical/computer system problem. The guys there referred me to try his friend's shop down the street. Went there and saw a M3 just got done with the smog check. What a good sign. It turned out to be the smog check computer has to be able to work with OBD II. What a relief.

Not too quick, just about to drive away, all error messages show up: System Malfunction, ABS, steering, dynamic drive, etc... Did the smog check computer damaged the computer system of the vehicle ?
Not really, problem was caused by the spinning of the rear wheels only during the smog check. Everything was back to normal after a quarter mile of driving.

Normal, no big deal. https://5series.net/forums/public/st...t/thumbsup.gif