Hello E34 experts,
Lots of great info on this forum. I come from the Volvo side of the enthusiast world and am a big fan of delicate old, AWD systems.
I've had my sights set on a 525iX and since I live in Germany have acquired a few "spares" already.
I recently bought a gearbox with 18K kilometers on it and the company said it was for the 525iX.
The ZF number on the case "1053 401 097" is correct and the BMW part number on the case "1 221 937.9" does seem to correspond to the S5D 320Z gearbox.
However, after receiving it I can clearly see that the rear part of the case is wrong. It must be for a RWD not AWD because there is nowhere for the transfer case to attach.
Is it possible to simply buy the rear housing from BMW Classic and swap it onto this gearbox? Or is this not possible...it's nice to have a gearbox with only 18,000 kilometers...would be a shame to waste it. Thanks for your insight!
I've attached to photos. The first is an actual 525iX gearbox. The second is the one I bought.