Will 2002 x5 4.6 front caliper and rotor fit a 3.0?

[racingbmwm3]

Originally Posted by x5glenn

I really can't figure it out but I can tell you I ordered rotors online and got the 4.6 ones by mistake so a already have the rotors, however I have uneven pad wear and feel that the original calipers are due for service and was thinking I could keep the 4.6 rotors and swap out my 3.0 calipers for the bigger 4.6 calipers and get a nice upgrade. I was hoping it is a perfect fit bolt on upgrade that I can do myself. I also wonder if i should go with the double piston 4.6 caliper or I think there is also a single piston one as well.. I really need good advise. Thanks!

You can't possibly be using 4.6 rotors with 3.0 calipers as the front rotors are too big (diameter) for the calipers/carrier in the front. It might be possible for the rear rotors to work on your car as they are only thicker, but that would definitely cause uneven wear.

Look at the post above for the upgrade. You just need the caliper carriers, calipers, and rotors.
I'm assuming this is just for looks as you won't notice any performance differences unless you start driving on the track at which point the pad material and brake fluid make more difference than the size of the disc and calipers.