Finding these guys was an absolute godsend. Our '08 BWM wagon had multiple bizarre issues that our local BMW mechanic couldn't figure out. Eventually, they narrowed it down to the CAS unit. Unfortunately, since it required special access privileges and software, they said the dealer would have to repair it — meaning a multi-thousand-dollar repair for an older vehicle. ECU Pro came to the rescue and were able to replace the unit. The process was simple and straightforward. My mechanic removed the unit and the ECU and sent them, along with a key, to ECU Pro, who then programmed a refurbished unit to work with our vehicle. So far, the gremlins that were plaguing us have disappeared. ECU Pro were easy to deal with and available via the phone. They were polite and extremely knowledgeable. I cannot recommend them highly enough.