Rear wheel bearing R/R for those on a shoestring budget. I did one of mine this past weekend and found these Youtube videos on the BMW 325 I rear bearing R/R to work perfectly for replacing the 124 rear bearings as well. And you don't need to dismantle the entire axle.
Rear Wheel Bearing Removal With No Special Tools BMW 325i - YouTube
Rear Wheel Bearing Installation With No Special Tools BMW 325i - YouTube

I purchased the full rear bearing kit.
One suggestion is to buy 2 of the 3/4 plumbing pieces (grind one down to the actual diameter of the bearing making install easy. Also have your metal cutting dremel handy in case the old bearing housing is stubborn to come out.
Mark

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91 300GD SWB with transplanted 87 OM603 turbo motor