Hi Clan,
My 05 XC90 I think has had the audio unit changed. It switches on and makes a noise but doesn't actually work. I did investigate it last year and it seems that the replacement has to be within 1000 of the original serial number to work. Am I remembering that correctly? Is there any way to program the car to accept the replacement unit? It is an identical unit from a similar car but the serial numbers are way different. Everything else works, park sensors etc.
I had to change my ECU a while back and boy was that a lot of hassle. I had to get the old one "read", the replacement wiped and programmed with the old units info. It worked though. I discovered that most people are not interested in these jobs and many claim to able to do it and cannot. Last check there were about five in the UK able to do it.
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