E60 Chassis Dynamics: Brakes
The E60 has a hydraulic dual-circuit brake system with "front/rear split". The electric precharging pump for the DSC function has been omitted. The 525i is fitted with conventional floating calipers on the front and rear axles. The 530i is fitted with floating calipers with frames on the front axle and conventional floating calipers on the rear axle. With the exception of the floating calipers on the 545i all caliper housing are made of aluminum.
The new lightweight brake rotors are used on the E60. The braking surface is made from grey cast iron, while the hubs are made from aluminum. The hubs are mated to the rotor using a series of rivets. The following configuration is used:
| Model | Front Rotor (mm) | Rear Rotor (mm) |
|---|---|---|
| 525i | 310 X 24 | 320 X 20 |
| 530i | 324 X 30 | 320 X 20 |
| 545i | 348 X 30 | 345 X 24 |
All brake discs are coated with geomet. M12 studs are used to bolt the wheel.