I am considering putting a new transfer case in my 2004 X3...and while looking for both new and used cases it looks like the part number changed in 2006 from #27103455134 to #27103455137...both are called an ATC400 and both have the same list price of $2340.11.

Are they compatible? Can I pick up a case from a later model and install it on my 2004?

Steve

I'll cross post in Bimmerforums as well....