I have a 992 Carrera, and after I unsuccessfully attempted to change the steering to a GT3 one, I ended up with fault codes like PSM and ABG. I took it to the Kahler folks, and they were terrific. They readjusted the steering, cleared the faults, reprogrammed the steering, and did alignment. They know what they are doing and have significant experience in German cars. Despite having a dealer warranty, I have been bringing all my vehicles to them for seven years. Overall a graet shop. Sam E.