Want an LSD in your older BMW?
BMWs are great cars and very popular for track and motorsports use. With upgrades such as improved suspension, uprated brakes and a Limited Slip Differential they can be even better, making the car faster and safer. Even with a standard engine and gearbox an LSD will give you better traction and car control; whilst uprated suspension & brakes will improve those even further – for example: uprated bushes and performance brake pads, as a first step.
Leading Japanese brands KAAZ and Cusco make a small range of limited slip diffs for BMWs and many other marques & models.
There can be some differences in models between regions of the globe – eg: European, American & Japanese, but we have good information to help identify what your car needs. See basic info below.
BMW LSD Applications:
Cusco No. Model Applications
(KAAZ No.)
BM1 E46 – 316t, 318i, 318Ti, 318ci, 320i
BM2 E30 – 320i, 323i, 325i, M3
(DBW3010) E36 – 320i, 323i, 325i, 328i
E28 – 525i, 535i
E34 – 525i, 530i, 535i
E40 Z3 – 2.0, 2.2i, 2.8i, 3.0i, M
BM3 E46 – 323i, 325i, 328i, 330i, 330ci
(DBW3020) E90 – 325i, 330i
E39 – 525i, 528i, 530i
E60 – 525i, 530i
E63 – 630i
E38 – 735i
E85 Z4 – 2.5i, 30.i
BM4 E30 – 318iS
(DBW1810) E36 – 318i, 318iS, 318Ti
E40 Z3 – 1.8i, 1.9i
BM5 E46 – M3
BM6 E36 – M3 3.2litres ‘96>
E34 – M5
E39 – M5
BM7 E36 – M3 3.0litres ‘93~’95
E40 Z3 – M
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| part number | bearing outside dia. | speed meter installation (Yes or No) | ring gear installation part outside diameter | ring gear installation bolt outside diameter | shaft fixation C ring | shaft insertion part inside diameter | shaft thread | outside diameter | high |
| BM1 | π41 | No | π108 | π10×8pcs | in the shaft | π30 | 27T | π153 | 157 |
| BM2 | π46 | yes, installation part size π73 | π115 | π12×10pcs | in the diff case | π30 | 27T | π168 | 169 |
| BM3 | π46 | No | π115 | π12×10pcs | in the shaft | π30 | 27T | π165 | 169 |
| BM4 | π41.3 | yes, installation part size π69 | π108 | π10×8pcs | in the diff case | π30 | 27T | π154 | 144 |
| BM5 | π50 | No | π132 | π14×10pcs | in the diff case | π36 | 32T | π185 | 174 |
| BM6 | π50 | No | π132 | π14×10pcs | in the diff case | π36 | 32T | π185 | 174 |
| BM7 | π46 | yes, installation part size π73 | π115 | π14×10pcs | in the diff case | π30 | 27T | π168 | 169 |
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