I've just brought drilled and vented brakes discs for my 2001 3 series coupe,i've changed the front with no real problems.But when i came to fit the rear i realised the old disc are'nt vented,so the caliper carrier won't fit over the vented discs.Is there any where i can get them to fit without buying new calipers i.e can i just replace the carrier ?

I guess i would return the discs you have got for perhaps just groved items specific for your model as rear brake force isnt that much (unless you are going racing)...good luck though, where did you get the discs from if you dont mind me asking?