Feb 17, 2012 · Long story short, I need to replace the PCM in my 01 Regal LS. I'm getting a PCM from another car with the same service number on the PCM. I've replaced computers before in OBD-II vehicles with salvage yard units and have not needed to have them flashed at the dealer. How to write or program VIN to another ECU. Hi, Dan here, from vehix411.com. Today, I will show you a little video about Toyota. This one is a Toyota Corolla O7. a common problem on Toyota and Lexus, ECU would throw a transmission code, and it will not ship properly. I’ve seen, actually, some with …