Z4ZeeGermans
Member
To begin with the context: So I took my Z4 to the garage for a few repairs and the MOT a few weeks ago. One of the repairs I asked them was to replace the rear wheel bearings, as I already did the fronts, and there was a metallic whine in sync with wheel spin especially while reversing. I would actually like to take care of that myself, but as luck would have it I was busy with movig house at the time.
It turns out it's not the wheel bearings making the noise, it's the rear diff bearings... Funny enough, MOT does apparently not care for the state of the diff, so it's not even mentioned as an advisory :|
Anyway, I now need either a nice example of a 3.23 ratio rear diff (part number 7514149), or a bearing kit to fix it myself. Anyone have either of these?

It turns out it's not the wheel bearings making the noise, it's the rear diff bearings... Funny enough, MOT does apparently not care for the state of the diff, so it's not even mentioned as an advisory :|
Anyway, I now need either a nice example of a 3.23 ratio rear diff (part number 7514149), or a bearing kit to fix it myself. Anyone have either of these?
