My sisters got herself a 2003 Polo 9N (the one with the twin round headlights) and she wants to change the stereo as it currently has a tape deck and I have my old Pioneer headunit lying around.

I've found the fitting kit to do it, but I've read that the engine warning light can come on if the stereo is changed and if this happens the car cannot be scanned with a diagnostic computer as it can blow the computer out. Is there a way around this problem?

The fitting kit I have seen is VW Polo Stereo Fitting Kit Wiring/Adaptor Surround | eBayCheers!