BMW 335i 2012-2018

BMW 335i 2012-2018 Brakes Specifications

Detailed technical specifications and documentation for the 2012-2018 BMW 335i braking system. Includes brake components, performance metrics, maintenance, and troubleshooting.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the brakes specifications for the 2012-2018 BMW 335I, including key features, measurements, and technical details. This section covers the braking system's components, performance metrics, and maintenance guidelines.

How to Use

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

Navigate through the brakes documentation by selecting the desired section from the table of contents. Each section is organized by component type and includes detailed subsections.

Key Specifications

Front Rotor Diameter

340 mm (13.4 inches)

Rear Rotor Diameter

330 mm (13.0 inches)

Brake Fluid Type

DOT 4

Stopping Distance (60 mph)

110 feet (33.5 meters)

Pedal Force for Full Braking

50 N (11.2 lbs)

Available Specifications

Brake System Overview

This section provides an overview of the braking system, including its components, design, and functionality.

Brake System Design

Dual-circuit hydraulic braking system with diagonal split
Front and rear disc brakes with ventilated rotors
Electronically controlled brake force distribution (EBD)
Anti-lock Braking System (ABS) with Dynamic Stability Control (DSC)

Brake Fluid Specifications

Recommended brake fluid: DOT 4
Brake fluid reservoir capacity: 1.0 liter
Minimum boiling point: 230°C (446°F)
Fluid replacement interval: Every 2 years or 30,000 miles

Note: Always use BMW-approved brake fluid to ensure optimal performance and safety.

Front Brakes

Detailed specifications and technical details for the front braking system.

Front Brake Rotors

Rotor diameter: 340 mm (13.4 inches)
Rotor thickness: 30 mm (1.18 inches)
Minimum rotor thickness: 28.4 mm (1.12 inches)
Ventilated design for improved heat dissipation

Front Brake Pads

Pad material: Low-metallic compound
Pad thickness (new): 12 mm (0.47 inches)
Minimum pad thickness: 3 mm (0.12 inches)
Wear sensor integrated for pad monitoring

Rear Brakes

Detailed specifications and technical details for the rear braking system.

Rear Brake Rotors

Rotor diameter: 330 mm (13.0 inches)
Rotor thickness: 20 mm (0.79 inches)
Minimum rotor thickness: 18.4 mm (0.72 inches)
Solid design for consistent performance

Rear Brake Pads

Pad material: Ceramic compound
Pad thickness (new): 10 mm (0.39 inches)
Minimum pad thickness: 2 mm (0.08 inches)
Wear sensor integrated for pad monitoring

Brake Performance

Performance metrics and testing data for the braking system.

Stopping Distance

60 mph to 0 mph: 110 feet (33.5 meters)
100 km/h to 0 km/h: 35 meters (114.8 feet)
Deceleration rate: 1.1 g
Tested under dry conditions with standard tires

Brake Pedal Feel

Pedal travel: 80 mm (3.15 inches)
Pedal force required for full braking: 50 N (11.2 lbs)
Progressive brake pedal response
Minimal fade under heavy use

Note: Brake pedal feel may vary slightly depending on driving conditions and brake pad wear.

Search Specifications

Search by specification name, value, or description

Brakes Specifications

Brake Type

Front Brakes: Ventilated disc

Rear Brakes: Solid disc

Parking Brake: Electromechanical

Brake Discs

Front Disc Diameter: 340 mm

Front Disc Thickness: 30 mm

Front Disc Min Thickness: 28.4 mm

Rear Disc Diameter: 330 mm

Rear Disc Thickness: 20 mm

Rear Disc Min Thickness: 18.4 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: 12 mm

Rear Pad Min Thickness: 3 mm

Material: Low-metallic compound

Brake Calipers

Front Calipers: Fixed 4-piston

Rear Calipers: Floating single-piston

Piston Diameter Front: 40 mm

Piston Diameter Rear: 38 mm

Part Number Front: 34 11 6 789 012

Part Number Rear: 34 21 6 789 013

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

Length Front: 600 mm

Length Rear: 800 mm

Burst Pressure: 3000 psi

Parking Brake System

Type: Electromechanical

Actuation: Button on center console

Cable Adjustment: Automatic

Part Number: 34 41 6 789 014

Brake Booster

Type: Vacuum-assisted

Diameter: 9 inches

Part Number: 34 31 6 789 015

Operating Pressure: 18-22 inHg

Brake System Diagnostics

Fault Codes

DSC 5DF0: Brake pressure sensor fault
DSC 5DF1: Brake pad wear sensor fault
DSC 5DF2: Brake fluid level sensor fault

Diagnostic Tool: BMW ISTA/D

Sensor Part Numbers: Pad Wear Sensor Front: 34 35 6 789 016
Pad Wear Sensor Rear: 34 35 6 789 017
Pressure Sensor: 34 35 6 789 018

Brake System Limits

Max Brake Temperature: 600°C

Max Deceleration: 1.2 g

Min Brake Fluid Level: 5 mm above MIN mark

Max Parking Brake Force: 1500 N

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 brake hoses for cracks or leaks

Replace brake fluid every 2 years regardless of mileage

30,000

Replace brake fluid
Inspect parking brake system
Check brake booster operation

Perform brake system bleed if necessary

60,000

Replace front and rear brake pads
Inspect and replace brake discs if necessary
Check brake caliper operation

Use only BMW-approved brake components

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the brake rotor thickness specification for the 2012-2018 BMW 335i?

The front brake rotors have a minimum thickness of 28.4 mm and the rear brake rotors have a minimum thickness of 18.4 mm. Always measure rotor thickness with a micrometer and replace if below the minimum specification.

What type of brake fluid is recommended for the 2012-2018 BMW 335i?

BMW recommends using DOT 4 brake fluid with a minimum dry boiling point of 446°F (230°C) and a wet boiling point of 311°F (155°C). Use only BMW-approved fluids such as BMW Part No. 81 22 2 209 003 or equivalent.

How often should the brake pads be replaced on a 2012-2018 BMW 335i?

Brake pad replacement intervals vary based on driving conditions, but typically range between 30,000 to 70,000 miles. Always inspect pads during routine maintenance and replace if thickness is below 3 mm.

What is the torque specification for the brake caliper mounting bolts?

The front brake caliper mounting bolts should be torqued to 81 Nm (60 lb-ft), and the rear brake caliper mounting bolts should be torqued to 35 Nm (26 lb-ft). Always use a calibrated torque wrench and follow BMW's tightening sequence.

Can I use aftermarket brake pads on my 2012-2018 BMW 335i?

While aftermarket brake pads can be used, BMW recommends using genuine BMW or BMW-approved brake pads to ensure optimal performance, noise reduction, and compatibility with the vehicle's braking system. Non-approved pads may void warranty coverage.

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, including inspection intervals, fluid replacement, and pad/rotor specifications.

Brake Fluid Replacement Procedure

Coming Soon

Step-by-step instructions for replacing brake fluid, including bleeding the system and using the correct fluid type.

Brake Pad and Rotor Replacement Video

Coming Soon

A video tutorial demonstrating the proper procedure for replacing brake pads and rotors on a 2012-2018 BMW 335i.

BMW Brake System Troubleshooting

Coming Soon

Common brake system issues, diagnostic steps, and solutions for the 2012-2018 BMW 335i.

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