I tried to replace the whole mirror on my 2006 S80 but got codes for the alarm system and the key fob would no longer work. It's because there is an antenna built into the mirror which is coded to the key (I suppose). Anyway, I found a good mirror at the salvage yard and disassembled it, figuring out how to not break anything on mine. The transplant was successful and I had zero errors/codes to deal with, nor any wiring issues.
Pros: successful transplant, zero errors
Cons: alarm codes, key fob issue
Vehicle:
Volvo S80
