BMW 440i 2017-present

BMW 440i 2017-present Brakes Specifications

Detailed technical specifications for the 2017-Present BMW 440i braking system, covering brake components, performance metrics, maintenance, and repair guidelines.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the brakes specifications for the 2017-Present BMW 440I, 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 brake 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

340 mm

Rear Brake Disc Diameter

330 mm

Brake Fluid Type

DOT 4

100 km/h to 0 Stopping Distance

36 meters

Brake Pedal Travel

70 mm

Available Specifications

Brake System Overview

This section provides an overview of the brake system, including the types of brakes used and their general specifications.

Front Brake System

Ventilated disc brakes with a diameter of 340 mm
4-piston fixed calipers
Brake pad thickness: 12 mm (new)
Minimum brake disc thickness: 28.4 mm
Brake fluid type: DOT 4

Rear Brake System

Solid disc brakes with a diameter of 330 mm
Single-piston floating calipers
Brake pad thickness: 10 mm (new)
Minimum brake disc thickness: 18.4 mm
Brake fluid type: DOT 4

Note: Ensure brake fluid is replaced every 2 years or as specified in the maintenance schedule.

Brake Components

Detailed information on the individual components of the brake system, including specifications and maintenance tips.

Brake Discs

Front brake disc diameter: 340 mm
Rear brake disc diameter: 330 mm
Front brake disc thickness: 30 mm (new)
Rear brake disc thickness: 20 mm (new)
Material: Cast iron with anti-corrosion coating

Brake Pads

Front brake pad friction material: Ceramic
Rear brake pad friction material: Ceramic
Front brake pad thickness: 12 mm (new)
Rear brake pad thickness: 10 mm (new)
Wear indicator included

Note: Replace brake pads when thickness is less than 3 mm.

Brake Performance

This section covers the performance characteristics of the brake system, including stopping distances and pedal feel.

Stopping Distance

100 km/h to 0 stopping distance: 36 meters
60 mph to 0 stopping distance: 118 feet
Brake assist system included
ABS (Anti-lock Braking System) standard
Dynamic Brake Control (DBC) for enhanced braking performance

Pedal Feel and Response

Brake pedal travel: 70 mm
Pedal force required for full braking: 50 N
Progressive brake pedal feel
Electronic Brake Force Distribution (EBD) standard
Brake fade resistance: High

Note: Regularly check brake fluid levels to maintain optimal pedal feel.

Search Specifications

Search by specification name, value, or description

Brakes Specifications

Brake System Type

Front Brakes: Ventilated disc

Rear Brakes: Solid disc

Brake Assist: DSC (Dynamic Stability Control) with ABS

Parking Brake: Electromechanical

Brake Disc Specifications

Front Disc Diameter: 370 mm

Front Disc Thickness: 30 mm

Rear Disc Diameter: 345 mm

Rear Disc Thickness: 24 mm

Minimum Thickness Front: 28.4 mm

Minimum Thickness Rear: 22.4 mm

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: 2.5 mm

Front Pad Part Number: 34116879623

Rear Pad Part Number: 34216879624

Brake Fluid Specifications

Type: DOT 4

Capacity: 1.0 liter

Replacement interval: Every 2 years or 30,000 miles

Boiling Point Min: 230°C (446°F)

Brake Caliper Specifications

Front Caliper Type: Fixed 4-piston

Rear Caliper Type: Floating single-piston

Front Caliper Part Number: 34116879625

Rear Caliper Part Number: 34216879626

Brake Hose Specifications

Front Hose Length: 450 mm

Rear Hose Length: 600 mm

Material: Reinforced rubber with steel braiding

Pressure Rating: 200 bar

Brake Pedal Specifications

Pedal Travel: 50-60 mm

Pedal Force Required: 30-50 N

Pedal Height: 150 mm

Brake System Pressure

Normal Operating Pressure: 50-70 bar

Maximum Pressure: 120 bar

Pressure Sensor Part Number: 34526879627

Brake System Diagnostics

Fault Codes

DSC 5E20: Brake pressure sensor fault
DSC 5E21: Brake fluid level sensor fault
DSC 5E22: Brake pad wear sensor fault

Diagnostic Tool: BMW ISTA

Sensor Part Numbers: Pressure Sensor: 34526879627
Fluid Level Sensor: 34526879628
Pad Wear Sensor: 34526879629

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

Torque Specifications: Caliper Bolts Front: 110 Nm
Caliper Bolts Rear: 90 Nm
Disc Retaining Screws: 22 Nm

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 and lines for leaks or damage

Perform visual inspection and functional test

30,000 miles

24 months

Replace brake fluid
Inspect brake calipers and pistons
Check parking brake operation

Use BMW-approved DOT 4 brake fluid

60,000 miles

48 months

Replace brake pads and discs if necessary
Inspect and lubricate caliper guide pins
Check brake system pressure

Replace wear sensors with new pads

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the brake rotor diameter and thickness for the 2017-Present BMW 440i?

The front brake rotors for the 2017-Present BMW 440i have a diameter of 340 mm and a thickness of 30 mm. The rear brake rotors have a diameter of 330 mm and a thickness of 20 mm. These dimensions are critical for ensuring proper brake performance and compatibility.

What type of brake pads are recommended for the BMW 440i?

The BMW 440i is equipped with high-performance brake pads, typically made from low-metallic or ceramic materials. Genuine BMW brake pads are recommended for optimal performance and compatibility. Aftermarket options should meet BMW's specifications, including heat resistance and friction coefficients.

How often should the brake fluid be replaced on a BMW 440i?

BMW recommends replacing the brake fluid every 2 years or 30,000 miles, whichever comes first. This ensures the brake system maintains optimal performance and safety. Always use DOT 4 or DOT 4 LV brake fluid as specified by BMW.

What is the recommended brake pad wear limit for the BMW 440i?

The recommended brake pad wear limit for the BMW 440i is 3 mm. If the pad thickness is below this limit, immediate replacement is required to avoid damage to the brake rotors and ensure safe braking performance.

Can I upgrade the brakes on my BMW 440i to a performance brake system?

Yes, BMW offers an M Performance Brake System upgrade for the 440i, which includes larger rotors, high-performance calipers, and upgraded brake pads. This system is designed for enhanced stopping power and reduced brake fade during aggressive driving.

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 Maintenance Guide

Coming Soon

A detailed guide on maintaining the brake system of your BMW 440i, including inspection intervals, fluid replacement, and pad wear checks.

Genuine BMW Brake Parts Catalog

Coming Soon

Access the official catalog of genuine BMW brake components, including rotors, pads, and calipers, for the 2017-Present 440i.

BMW Brake Fluid Specifications

Coming Soon

Learn about the recommended brake fluid types and specifications for the BMW 440i, including DOT 4 and DOT 4 LV standards.

M Performance Brake System Overview

Coming Soon

Explore the features and benefits of upgrading to the M Performance Brake System for the BMW 440i, including installation guidelines.

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