Jesus how much do these things go for new? I can't imagine it would take more than an hour or two to unbolt the transfer case and pop a new one in, unless you are taking down the whole drivetrain to do so. So that would mean a new xdrive transfer case is like 3600?
ECS sells remanufactured Genuine BMW ATC500 TC for 2366 minus 200 core so its 2166
Home Page > Search > 27107555297 > ES#2167563 Remanufactured ATC 500 Transfer Case - 27107555297
I'm pretty sure you can unbolt and replace yourself, no?
I'd get a second opinion from another indie, are you sure its not your transfer case actuator motor thats going or something? or maybe you need a fluid change?