ECU Pro did an amazing job with repairing the CAS module for my 328i bmw. The turn around time was unbelievably fast once they received my parts. The whole process was easy and they even had video instructions on how to remove the parts from my car. They emailed me and even called me back when I had a few questions about the repairs. They even sent me a email with a video attached showing they tested my CAS module in one of their test cars to insure me it worked and had been repaired. I highly recommend ECU Pro to anyone looking for a transparent quality repair service.