G'day All,

Considering fitting a used ECU to my 2013 Caddy. I'm trying to get it back to pre-dieselgate software... Having the dieselgate fixed ECU as a spare would be handy in case I need to take it back to VW. I wondered how difficult it would be to fit and code a used ECU to the car? Is this a 10 min job for someone with VCDS and a decent working knowledge, or will it possibly be a nightmare?

I am pretty naïve when it comes to the ECU side of things...
My understanding is that my current ECU will have a 4 digit pin, and that coding a used ECU to my car will require both that, and the used ECU's original pin, is that correct or have I got my wires crossed? I've found a suitable used ECU on the net, but unfortunately they don't seem to have that original pin code

If anyone has any experience or insight I'd love to hear it!

Thanks all.

Tk