I had to take mine in to connect to the STAR DAS system to determine which of my wheels speed sensors was defective. Cost me $100, but out of the three import shops that are owned by friends in the area, none had the necessary equipment and said that for the rather large extra expense and little revenue brought in, they would not fork over the $$$. There are certain things they will have to send someone to the dealer to 'work with' (aka get raped)...