Few names carry more weight in braking than Brembo. Across motorsport, Brembo and its Group brands have now passed 1,000 world titles since 1975 — Formula 1, MotoGP, WEC, IMSA, and more. This rear brake rotor (part number 08.9859.81) is the rotating disc the pads bite into, the part doing the real work of turning kinetic energy into heat under hard braking.
Brembo machines its rotors to tight runout tolerances and uses Pillar Venting Technology on many applications to pull heat out of the disc faster. Match this part to your application using the fitment table below — Brembo's range covers exact OE positions, and getting the right one matters as much as the brand.
Technical Details
- Manufacturer part number: 08.9859.81
- Part type: Rear Brake Rotor
- Vehicle system: Rear brake system
- Listed fitment years: 2003–2005
Fitment & Compatibility
Use the fitment table below to confirm year, model, submodel, and any brake-package notes before ordering. Optional and AMG/sport brake packages can change the correct part.
PMB Performance brings more than 20 years of brake and Porsche parts experience to every order. If you are unsure about the brake package or year, send your VIN and we will confirm it.
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 2003 | BMW | Z4 | 2.5i | |
| 2004 | BMW | Z4 | 2.5i | |
| 2005 | BMW | Z4 | 2.5i |