BMW 740i 2008-2015

BMW 740i 2008-2015 Brakes Specifications

Detailed technical specifications and service information for the 2008-2015 BMW 740i brake system. Includes brake components, maintenance procedures, torque specifications, and diagnostic tips.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the brakes specifications for the 2008-2015 BMW 740I, 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', 'pad thickness', or 'caliper type'.

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

345 mm

Front Brake Pad Thickness (New)

12 mm

Rear Brake Pad Thickness (New)

10 mm

Brake Fluid Type

DOT 4

Available Specifications

Brake System Overview

Detailed description of the brake system components and their functions

Brake Discs

Front brake disc diameter: 348 mm
Rear brake disc diameter: 345 mm
Front brake disc thickness: 30 mm
Rear brake disc thickness: 24 mm
Material: Ventilated cast iron

Brake Pads

Front brake pad thickness (new): 12 mm
Rear brake pad thickness (new): 10 mm
Material: Ceramic composite
Wear limit: 3 mm
Pad replacement interval: Approximately 50,000 miles

Note: Brake pad wear may vary based on driving conditions and habits.

Brake Calipers

Technical details and specifications of the brake calipers

Front Calipers

Type: 4-piston fixed caliper
Piston diameter: 40 mm
Material: Aluminum alloy
Caliper weight: 3.2 kg
Brake fluid capacity: 1.2 liters

Rear Calipers

Type: 2-piston floating caliper
Piston diameter: 38 mm
Material: Aluminum alloy
Caliper weight: 2.8 kg
Brake fluid capacity: 0.8 liters

Note: Ensure proper brake fluid level and quality for optimal performance.

Brake Hydraulics

Details about the hydraulic system and its components

Master Cylinder

Bore diameter: 25.4 mm
Material: Cast aluminum
Fluid type: DOT 4
Maximum pressure: 120 bar
Reservoir capacity: 0.5 liters

ABS System

Type: Bosch 9.0
Number of channels: 4
ABS activation speed: 5 km/h
System weight: 4.5 kg
Compatibility: DSC (Dynamic Stability Control)

Note: ABS system requires regular diagnostics and maintenance.

Brake Performance

Performance metrics and testing data for the brake system

Stopping Distance

100 km/h to 0: 36 meters
80 km/h to 0: 28 meters
60 km/h to 0: 18 meters
Brake fade resistance: High
Pedal feel: Linear and responsive

Thermal Performance

Maximum operating temperature: 600°C
Heat dissipation rate: 1200 W
Cooling type: Ventilated discs
Thermal capacity: 450 kJ
Brake fade threshold: 450°C

Note: Avoid prolonged heavy braking to prevent overheating.

Search Specifications

Search by specification name, value, or description

Brakes Specifications

Brake System Type

Front: Ventilated disc brakes

Rear: Solid disc brakes

Parking Brake: Electromechanical parking brake

Brake Disc Specifications

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 Pad Specifications

Front Pad Thickness New: 14 mm

Front Pad Thickness Min: 3 mm

Rear Pad Thickness New: 12 mm

Rear Pad Thickness Min: 3 mm

Material: Low-metallic compound with wear sensor

Brake Caliper Specifications

Front Caliper Type: Floating caliper

Rear Caliper Type: Floating caliper

Piston Diameter Front: 60 mm

Piston Diameter Rear: 42 mm

Seal Material: EPDM rubber

Brake Fluid Specifications

Type: DOT 4 LV

Capacity: 1.0 liter

Boiling Point Min: 230°C

Replacement interval: Every 2 years or 30,000 miles

Parking Brake Specifications

Type: Electromechanical

Actuation: Automatic via button

Cable Adjustment: Automatic

Part Number: 34406852461

Brake System Pressures

Normal Operating Pressure: 20-30 bar

Maximum Pressure: 200 bar

ABS Activation Pressure: 150 bar

Brake System Sensors

Front Wear Sensor Part Number: 34356789012

Rear Wear Sensor Part Number: 34356789013

ABS Sensor Part Number: 34567890123

Parking Brake Sensor Part Number: 34567890124

Brake System Maintenance

Pad Replacement interval: Every 30,000-50,000 miles

Disc Replacement interval: Every 60,000-80,000 miles

Fluid Replacement interval: Every 2 years or 30,000 miles

inspection Interval: Every 10,000 miles

Brake System Diagnostics

Fault Codes

5DF0: Brake pad wear sensor fault
5DF1: Brake fluid level low
5DF2: Parking brake malfunction
5DF3: ABS sensor fault

Diagnostic Tool: BMW ISTA/D

Diagnostic Procedure: Follow ISTA/D guided fault finding

Service Information Service

Detailed service requirements and schedules for the brake system

10,000

Inspect brake pads and discs for wear
Check brake fluid level and condition
Inspect parking brake function

Perform visual and functional checks

30,000

Replace brake fluid
Inspect brake lines and hoses
Check ABS system functionality

Follow BMW-recommended procedures

60,000

Replace brake pads if necessary
Replace brake discs if necessary
Inspect and lubricate caliper slides

Use genuine BMW parts for replacement

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the recommended brake pad thickness for the 2008-2015 BMW 740i?

The recommended minimum brake pad thickness for the 2008-2015 BMW 740i 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 should be used in the 2008-2015 BMW 740i?

The 2008-2015 BMW 740i requires DOT 4 brake fluid. BMW recommends using their branded brake fluid 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 2008-2015 BMW 740i?

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 worn below these specifications or show signs of warping or cracking.

What is the torque specification for the brake caliper bolts on the 2008-2015 BMW 740i?

The torque specification for the brake caliper bolts on the 2008-2015 BMW 740i is 81 Nm (60 lb-ft) for the front calipers and 35 Nm (26 lb-ft) for the rear calipers. Always use a calibrated torque wrench to ensure proper tightening.

Can I use aftermarket brake components on my 2008-2015 BMW 740i?

While aftermarket brake components can be used, BMW recommends using genuine BMW parts to ensure compatibility, performance, and safety. Non-genuine parts may affect braking performance and could void your 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 2008-2015 BMW 740i.

Brake Fluid Replacement Procedure

Coming Soon

Step-by-step instructions for replacing brake fluid in the 2008-2015 BMW 740i, including safety precautions and required tools.

Brake Pad and Rotor Replacement Guide

Coming Soon

Comprehensive instructions for replacing brake pads and rotors on the 2008-2015 BMW 740i, including torque specifications and alignment tips.

BMW Brake System Diagnostics

Coming Soon

A guide to diagnosing common brake system issues in the 2008-2015 BMW 740i, including error codes and troubleshooting steps.

About the Author

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