BMW differential bearing set Type MM (Millimeter) – 188mm
BMW differential bearing set Type MM (Millimeter) – 188mm, RacingDiffs part no. RD2002. The set contains the bearings and oil seals needed to overhaul the differential and cure bearing noise or oil leaks.
Key Features
- Purpose-built for mm-type diffs (pre-’99): For bolt-on side-cap differentials used up to 1999.
- OEM-quality components: Engineered for long life and factory-correct fit/function.
- Comprehensive kit: Includes bearings, seals, crush sleeve, and O-rings for a thorough rebuild.
- Size coverage: Available for 168 mm (4-cyl), 188 mm (6-cyl), and 210 mm (8-cyl) applications.
- Guided support: VIN-based identification video and installation tutorials in our video gallery .
Technical Specs
| Spec | Value |
|---|---|
| Which size do I need? | 4-cyl: 168 mm 6-cyl: 188 mm 8-cyl: 210 mm |
| Confirm fitment | Use our video guide to check via VIN on BMWFans.info and confirm your exact differential type/size. |
| Noise diagnosis tip | During a safe drive, gently weave left/right (like warming tires). If noise changes, suspect a wheel bearing. If noise stays constant, the differential bearings likely need replacement. |
| Backlash target | 0.08–0.12 mm on most BMW ring-and-pinion sets (verify at multiple positions with a dial indicator). |
| Included in the set | 1× Crush sleeve 1× Small pinion bearing 1× Large pinion bearing 2× Side bearings 1× Input flange oil seal 2× Output flange oil seals 2× Side-cap O-ring seals |
| Setup note | Use correct shims to set carrier preload/backlash and verify gear-contact pattern with marking compound. |
Fitment
- 3 Series: E21 (big case), E30, E36
- 5 Series: E28, E34
- 7 Series: E23, E32, E38 (early models)
- 8 Series: E31
- Z Series: Z1, Z3, Z8
Specifications
| Spec | Value |
|---|---|
| Brand | RacingDiffs |
| Part number | RD2002 |
| Version | 188mm |
| Weight | 2,5 kg |
RacingDiffs
Founded in Belgium, RacingDiffs is a specialist developer of limited slip differential conversions and upgrades for popular rear-wheel-drive platforms. Their bolt-in LSD kits convert open differentials into performance units without a full housing swap — a cost-effective solution for track day and drift enthusiasts seeking better traction and balance.
Official page: racingdiffs.com
Official page: racingdiffs.com
BMW differential bearing set Type MM (Millimeter) – 188mm
237.16€
Excl. VAT: 196.00€
Tags: RS-RD-RD2002,