If i have an 05 cooper s and found a donor car a 07 cooper s with nav is there any way to make that nav work in my car?? I have the hk the donor car does not please help.....

 

I don't believe they are compatible.
The HK isn't the big deal, it's the nav unit/display that needs to interface with the BC1.

 

Bc1? Please explain?

 

ttt

 

By "07 cooper s", I assume you mean the hardtop not the convertible. No way to make it work. The electronics in an R56 is completely different from an R53. Physically you won't be able to fit it anyway because the dash was completely redesigned.

 

BC1=BCM=Body Control Module - the computer that controls the non-engine functions of the vehicle.