4 stud BMW e30 wheels fit perfectly, they often have a slightly lower offset of 24-25 so fill the arches nicely

Vauxhall have correct PCD but the centre bore is ever so slightly smaller, something like 0.5mm. Someone on the forums fitted a set and all was peachy till he tried to get them off again, they were siezed solid!!
This will likely only be an isssue with OEM vaux wheels, most aftermarket alloys will have spiggot rings which you can either replace or open out slightly.
One thing to remember though, is to check the bolt seating before you fit them, most BMW/aftermarket wheels have a tapered seating whilst OEM VW are a ball seat. Best way to tell is stuff a big lump of blue-tack into the bolt hole and check the shape.
If you need a tapered seating, BMW bolts are the correct thread pitch and will be tapered
