The ZF310/ZF320 transmission from the E36 328i and M3 have been known to have shifter issues over the years. If you have been experiencing a sloppy shifting experience, gears popping out of place, or the infamous 5th/reverse gear lean, then this is your culprit. An easy way to tell is if you are in neutral, and the shifter feels extremely sloppy, or does not auto center back to neutral when you push it to the left or right. 
  
After using this kit, expect your shifts to be tight and crisp. This will make your transmission feel like it's brand new. 
  
BMW released two service bulletins for this issue:
Fitment: 
3 Series
E36 (92-99) > 328i
E36 (92-99) > 328ic
E36 (92-99) > 328is
E36 (92-99) > M3 (1995)
E36 (92-99) > M3 (96-99)
E46 (99-05) > 328Ci
E46 (99-05) > 328i
E46 (99-05) > 330Ci
E46 (99-05) > 330i
E46 (99-05) > 330xi 
5 Series
E39 (97-03) > 528i
E39 (97-03) > 525i (M54)
E39 (97-03) > 530i (M54) 
Z Series
Z3 (97-02) > Z3 2.8
Z3 (01-02) > Z3 3.0
Z3 (98-00) > Z3 M - S52
Z4 (06-08) > Z4 2.5i M54