I have a 2006 S40; the platform is shared with the Mazda 3 and the Euro Mk2 Focus. The V50, C30, and C70 are related Volvos (wagon, coupe, and convertible)Thanks. I don't know what kind of Volvo you have, but I think the V40 of that era was built on the same platform as the Mazda3 and also maybe the Ford Focus. So they share and/or have a lot of similar parts.
Some of the suspension parts interchange, but I think the ball joints on the LCA are a bit different.