BMW 750i 2001-2008

BMW 750i 2001-2008 Brakes Specifications

Detailed technical specifications for the brake system of the 2001-2008 BMW 750i, including brake disc dimensions, pad specifications, caliper details, hydraulic system parameters, and ABS functionality.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the brakes specifications for the 2001-2008 BMW 750i, including key features, measurements, and technical details.

How to Use

Use the search function to locate specific brake specifications by entering keywords such as 'brake disc diameter' or 'brake pad thickness'.

Navigate through the brakes documentation sections using the table of contents or by scrolling through the document. Each section is clearly labeled for easy access.

Key Specifications

Front Brake Disc Diameter

348 mm

Rear Brake Disc Diameter

324 mm

Front Brake Pad Thickness (New)

14 mm

Rear Brake Pad Thickness (New)

12 mm

Brake Fluid Type

DOT 4

Available Specifications

Brake System Overview

This section provides an overview of the brake system, including its components and their functions.

Brake System Components

Dual-circuit hydraulic brake system with diagonal split
Front and rear disc brakes with ventilated discs
Anti-lock Braking System (ABS) with Dynamic Stability Control (DSC)
Electronic Brake Force Distribution (EBD)

Brake System Operation

Hydraulic pressure is distributed to all four wheels
ABS prevents wheel lock-up during hard braking
DSC enhances stability by controlling brake pressure individually
EBD optimizes brake force distribution between front and rear axles

Note: The brake system is designed to provide maximum stopping power while maintaining vehicle stability.

Brake Disc Specifications

This section details the specifications for the front and rear brake discs.

Front Brake Discs

Diameter: 348 mm
Thickness: 30 mm
Ventilated design for improved heat dissipation
Material: High-carbon cast iron

Rear Brake Discs

Diameter: 324 mm
Thickness: 20 mm
Ventilated design for improved heat dissipation
Material: High-carbon cast iron

Note: Brake discs are designed to withstand high temperatures and provide consistent performance.

Brake Pad Specifications

This section covers the specifications for the front and rear brake pads.

Front Brake Pads

Thickness (new): 14 mm
Minimum thickness: 3 mm
Material: Low-metallic compound
Designed for high friction and low noise

Rear Brake Pads

Thickness (new): 12 mm
Minimum thickness: 2 mm
Material: Low-metallic compound
Designed for high friction and low noise

Note: Brake pads should be inspected regularly and replaced if worn below the minimum thickness.

Brake Fluid Specifications

This section provides details on the brake fluid requirements and specifications.

Brake Fluid Type

DOT 4 brake fluid
Minimum boiling point: 230°C (dry)
Minimum boiling point: 155°C (wet)
Compatible with ABS and DSC systems

Brake Fluid Capacity

Total system capacity: 1.0 liter
Recommended change interval: Every 2 years or 30,000 miles
Ensure proper bleeding of the system after fluid replacement

Note: Using the correct brake fluid is critical for the proper operation of the brake system.

Search Specifications

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Brakes Specifications

Brake System Type

System: Hydraulic dual-circuit with ABS, DSC, and brake assist

Front Brakes: Ventilated disc brakes

Rear Brakes: Ventilated disc brakes

Parking Brake: Electromechanical parking brake

Brake Discs

Front Disc Diameter: 348 mm

Front Disc Thickness: 30 mm

Front Disc Min Thickness: 28.4 mm

Rear Disc Diameter: 345 mm

Rear Disc Thickness: 24 mm

Rear Disc Min Thickness: 22.4 mm

Material: Cast iron with anti-corrosion coating

Brake Pads

Front Pad Thickness New: 14 mm

Front Pad Min Thickness: 3 mm

Rear Pad Thickness New: 14 mm

Rear Pad Min Thickness: 3 mm

Material: Low-metallic compound

Part Number Front: 34 11 6 789 012

Part Number Rear: 34 21 6 789 013

Brake Calipers

Front Caliper Type: Fixed four-piston aluminum calipers

Rear Caliper Type: Floating single-piston aluminum calipers

Piston Diameter Front: 40 mm

Piston Diameter Rear: 38 mm

Part Number Front: 34 11 6 789 014

Part Number Rear: 34 21 6 789 015

Brake Fluid

Type: DOT 4

Capacity: 1.0 liter

Boiling Point Dry: 230°C

Boiling Point Wet: 155°C

Replacement interval: Every 2 years or 30,000 miles

Brake Hoses

Material: Reinforced rubber with steel braiding

Front Hose Length: 450 mm

Rear Hose Length: 600 mm

Burst Pressure: 200 bar

Part Number Front: 34 31 6 789 016

Part Number Rear: 34 41 6 789 017

Brake Master Cylinder

Bore Diameter: 25.4 mm

Reservoir Capacity: 0.5 liters

Part Number: 34 31 6 789 018

ABS System

Type: Bosch 5.7 ABS with DSC

Sensor Type: Active wheel speed sensors

Control Unit Part Number: 34 51 6 789 019

Operating Pressure: 180 bar

Parking Brake System

Type: Electromechanical

Motor Power: 12V, 200W

Cable Adjustment: Automatic

Part Number Motor: 34 61 6 789 020

Part Number Control Unit: 34 61 6 789 021

Brake Pedal

Pedal Ratio: 4.2:1

Pedal Travel: 120 mm

Force Required: 50 N for 0.4g deceleration

Service Information Service

Detailed service requirements and schedules for the brake system

10,000 miles

12 months

Inspect brake pads and discs for wear
Check brake fluid level and condition
Inspect brake hoses for cracks or leaks

Replace brake fluid every 2 years regardless of mileage

30,000 miles

36 months

Replace brake fluid
Inspect ABS sensors and wiring
Check parking brake operation

Perform brake system bleed after fluid replacement

60,000 miles

72 months

Replace brake pads and discs if necessary
Inspect brake calipers for proper operation
Check brake master cylinder for leaks

Use only BMW-approved brake components

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the recommended brake pad thickness for the 2001-2008 BMW 750i?

The recommended minimum brake pad thickness for the BMW 750i is 3mm. Pads should be replaced if they are worn below this threshold to ensure optimal braking performance and safety.

What type of brake fluid is recommended for the BMW 750i?

The BMW 750i requires DOT 4 brake fluid. BMW recommends using their branded brake fluid (part number 81 22 9 407 103) or an equivalent high-performance DOT 4 fluid with a minimum dry boiling point of 446°F (230°C) and a wet boiling point of 311°F (155°C).

How often should the brake rotors be inspected on a BMW 750i?

Brake rotors should be inspected every 10,000 miles or during routine maintenance. The minimum thickness for front rotors is 28.4mm, and for rear rotors, it is 18.4mm. Rotors should be replaced if they are below these specifications or show signs of warping, cracking, or excessive wear.

What is the torque specification for the brake caliper bolts on the BMW 750i?

The torque specification for the front brake caliper bolts is 81 lb-ft (110 Nm), and for the rear brake caliper bolts, it is 63 lb-ft (85 Nm). Always use a calibrated torque wrench to ensure proper tightening and avoid over-torquing.

Can I use aftermarket brake components on my BMW 750i?

While aftermarket brake components can be used, BMW strongly recommends using genuine BMW parts or OEM-equivalent parts to maintain braking performance, safety, and warranty compliance. Non-genuine parts may affect the vehicle's braking system and void the warranty.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

BMW Brake System Overview

Coming Soon

A detailed guide on the brake system components, maintenance schedules, and troubleshooting tips for the 2001-2008 BMW 750i.

Brake Fluid Replacement Procedure

Coming Soon

Step-by-step instructions for replacing brake fluid in the BMW 750i, including bleeding procedures and safety precautions.

Brake Pad and Rotor Replacement Guide

Coming Soon

A comprehensive guide to replacing brake pads and rotors on the BMW 750i, including torque specifications and alignment tips.

BMW Brake System Troubleshooting

Coming Soon

Common brake system issues and solutions for the BMW 750i, including noise, vibration, and reduced braking performance.

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