So my 2006 X1 couple is worn down, and causing the shaft to movie forward and back.
I removed the coupler and examined it and sure enough the teeth and very much worn down.
The issue im running into, is it seems I can only purchase the entrie drive shaft, coupler and nut package from dealers and online stores... Seems a bit excessive.
The coupler is 5" in diameter at the wide section, and 3" at the small side with the teeth, 4 bolt pattern...
Does anyone know where i could find even a used one or a new coupler??