Working from memory - IIRC there are two different styles depending on year and I think the later style might fit your car's plug (OK, quick eBay search... maybe this)Could anyone advise me on what I need to connect this. I'm pretty sure I need some sort of adaptor - but what adaptor? I have been looking at something called 'Peugeot 307 wiring harness adaptor' but it doesn't look as if it will connect up to the wires in my car.
Can't speak to the knowledge of the people there, but they list a phone number to call if uncertain. Hopefully they could positively say that Yes, this adapter fits the 307 from date x to date y - and be willing to take it back, on their dime, should it turn out to not be the case. Or try to locate a shop local to you that carry them and have a look/compare in person.Thanks for the reply mtempsch.
I thought as much that was all I needed to do, but for some odd reason, there's part of me that thinks the adaptor won't fit directly into the connection in my car (see pics).