Audi Audi A4 2009-2016 Brakes Specifications
Detailed technical specifications and maintenance guidelines for the braking system of the 2009-2016 Audi A4. Includes brake pads, rotors, calipers, fluid, and performance metrics.
Audi A4 B8 (2009-2016) Brake Specifications Overview Specifications
This document provides detailed specifications and technical information for the braking system of the 2009-2016 Audi A4 (B8 platform). It covers key components, dimensions, and operational parameters. Use this guide to understand the brake system's design, maintenance requirements, and performance characteristics. Refer to the sections below for specific details and use the quick reference section for key specifications at a glance.
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To find specific information, use the search functionality by typing keywords related to the brake component or specification you are looking for. Results will highlight relevant sections and subsections.
Navigate through the document by selecting sections from the table of contents. Each section contains detailed descriptions and technical specifications. Use the quick reference section for fast access to key brake specifications.
Key Specifications
Front Rotor Diameter
12.8 in (325 mm)
Rear Rotor Diameter
11.8 in (300 mm)
Front Caliper Pistons
Dual-piston
Rear Caliper Pistons
Single-piston
Recommended Brake Fluid
DOT 4
Available Specifications
Front Brake System
The front brake system of the Audi A4 B8 features ventilated discs with aluminum calipers. This section provides detailed specifications for front brake components, including rotor dimensions, caliper types, and pad specifications.
Front Brake System
The front brake system of the Audi A4 B8 features ventilated discs with aluminum calipers. This section provides detailed specifications for front brake components, including rotor dimensions, caliper types, and pad specifications.
Front Brake Rotors
- Rotor diameter: 12.8 inches (325 mm)
- Rotor thickness: 1.1 inches (28 mm)
- Ventilated disc design for improved heat dissipation
- Minimum rotor thickness specification: 1.0 inches (25 mm)
- Manufactured from high-carbon cast iron
Front Brake Calipers
- Floating caliper design with aluminum construction
- Dual-piston configuration for even pad wear
- Caliper diameter: 2.76 inches (70 mm)
- Compatible with DOT 4 brake fluid
- Weight-optimized design for reduced unsprung mass
Rear Brake System
The rear brake system of the Audi A4 B8 includes solid discs and single-piston calipers. This section details rear brake specifications, including rotor dimensions, caliper types, and pad specifications.
Rear Brake System
The rear brake system of the Audi A4 B8 includes solid discs and single-piston calipers. This section details rear brake specifications, including rotor dimensions, caliper types, and pad specifications.
Rear Brake Rotors
- Rotor diameter: 11.8 inches (300 mm)
- Rotor thickness: 0.8 inches (20 mm)
- Solid disc design for consistent braking performance
- Minimum rotor thickness specification: 0.7 inches (18 mm)
- Manufactured from high-carbon cast iron
Rear Brake Calipers
- Floating caliper design with steel construction
- Single-piston configuration for reliable braking
- Caliper diameter: 2.36 inches (60 mm)
- Compatible with DOT 4 brake fluid
- Corrosion-resistant coating for durability
Brake Fluid and Hydraulic System
The hydraulic braking system of the Audi A4 B8 relies on DOT 4 brake fluid for optimal performance. This section provides specifications for brake fluid, master cylinder, and ABS system.
Brake Fluid and Hydraulic System
The hydraulic braking system of the Audi A4 B8 relies on DOT 4 brake fluid for optimal performance. This section provides specifications for brake fluid, master cylinder, and ABS system.
Brake Fluid Specifications
- Recommended brake fluid: DOT 4
- Minimum boiling point: 446°F (230°C)
- Maximum water content: 2%
- Change interval: Every 2 years or 24,000 miles
- Compatible with synthetic brake fluids
ABS System
- Bosch 8.0 ABS system with electronic brakeforce distribution (EBD)
- Four-channel ABS for individual wheel control
- Integrated traction control system (ASR)
- Brake assist function for emergency braking
- Regenerative braking compatibility with optional systems
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Brakes Specifications
Overview
- Type
- disc brakes
- Configuration
- ventilated front discs, solid rear discs
- Platform
- MLB (Modular Longitudinal Matrix)
- Material
- cast iron (discs), aluminum (calipers)
- Location
- front and rear axle
Dimensions
- Front Rotor Diameter
- 12.8 inches (325 mm)
- Rear Rotor Diameter
- 11.8 inches (300 mm)
- Front Caliper Piston Diameter
- 1.97 inches (50 mm)
- Rear Caliper Piston Diameter
- 1.38 inches (35 mm)
- Brake Pad Thickness
- 0.47 inches (12 mm)
- Minimum Brake Pad Thickness
- 0.16 inches (4 mm)
- Maximum Rotor Warp
- 0.0008 inches (0.02 mm)
Materials
- Brake Discs
- high-carbon cast iron
- Brake Calipers
- aluminum alloy
- Brake Pads
- semi-metallic friction material
- Brake Lines
- steel-reinforced rubber
- Master Cylinder
- aluminum alloy
Features
- Brake Assist
-
- emergency brake assist
- brake assist
- electronic brake force distribution
- Control Systems
-
- ABS (Anti-lock Braking System)
- ESC (Electronic Stability Control)
- traction control
- drag torque control
- Cooling Systems
-
- front rotor cooling ducts
- rear rotor cooling channels
- caliper cooling vents
- Wear indicators
-
- visual wear indicators
- audible wear indicators
- electronic wear sensors
- Driving Modes
-
- comfort mode
- sport mode
- manual mode
- snow mode
Safety Features
- Emergency Braking
-
- automatic emergency braking
- emergency brake assist
- post-crash braking
- Stability Control
-
- electronic stability control
- cornering brake control
- traction control
- Warning Systems
-
- brake system warning light
- low brake fluid warning
- ABS fault warning
Comfort Features
- Automatic Hold
-
- auto hold function
- hill hold assist
- electronic parking brake
- Brake Drying
-
- automatic brake drying
- rain braking mode
- Comfort Mode
-
- smooth braking in traffic
- gradual brake application
- Noise Reduction
-
- brake pad wear reduction
- noise-dampening shims
Accessories
- Brake Pads
-
- semi-metallic pads
- low-dust pads
- performance pads
- ceramic pads
- Rotors
-
- standard rotors
- cross-drilled rotors
- slotted rotors
- performance rotors
- Brake Fluid
-
- DOT 4 fluid
- DOT 5.1 fluid
- synthetic fluid
- racing fluid
Maintenance
- Service interval
- every 12,000 to 15,000 miles or 12 months
- Service Items
-
- inspect brake pads
- inspect rotors
- check brake fluid level
- inspect brake lines
- test ABS system
- bleed brakes if necessary
- Maintenance Notes
-
- use manufacturer-approved brake fluid
- avoid mixing different DOT ratings
- clean brake components with approved solvents
- replace worn or damaged components immediately
Warranty
- Basic Warranty
- Miles: 50000Years: 4Coverage: bumper-to-bumperTerms: includes brake components
- Powertrain Warranty
- Miles: 70000Years: 5Coverage: powertrain componentsTerms: includes master cylinder and ABS
- Corrosion Warranty
- Miles: 120000Years: 12Coverage: perforation of body panelsTerms: includes brake lines and components
- Roadside Assistance
- Miles: unlimitedYears: 4Coverage: 24/7 roadside assistanceTerms: includes emergency brake service
Production Details
- Manufacturer
- Name: Audi AGLocation: Ingolstadt, GermanySupplier: Brembo or Continental
- Manufacturing Process
-
- CNC machining of brake components
- high-temperature treatment of discs
- aluminum casting for calipers
- surface coating for corrosion resistance
- laser cutting of brake lines
- Quality Control
- inspection Process: dimensional inspection, surface finish inspection, leak testing, functional testingCertifications: ISO 9001, IATF 16949, TÜV certification
- Sustainability Practices
-
- recyclable materials
- low-emission manufacturing
- energy-efficient processes
- waste reduction programs
- Production Metrics
- Annual Production: over 1 million unitsQuality Rate: 99.9% defect-freeDelivery Time: just-in-time productionGlobal Distribution: worldwide supply chain
Service Information for brakes Service
Maintenance and service requirements specific to this component
- inspect brake pads
- inspect rotors
- check brake fluid level
- inspect brake lines
- test ABS system
Perform visual inspection of all brake components. Replace pads if thickness is below 0.16 inches (4 mm).
- replace brake pads
- inspect and resurface rotors
- bleed brake system
- check caliper operation
- test emergency brake
Use manufacturer-approved brake fluid. Ensure proper torque specifications for calipers and rotors.
- replace rotors
- replace brake fluid
- inspect master cylinder
- clean and lubricate brake hardware
- test ABS functionality
Replace rotors if thickness variation exceeds 0.0008 inches (0.02 mm). Use synthetic brake fluid for better performance.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the recommended brake pad thickness for the 2009-2016 Audi A4?
What is the recommended brake pad thickness for the 2009-2016 Audi A4?
The recommended minimum brake pad thickness for the 2009-2016 Audi A4 is 3mm. Below this thickness, the brake pads should be replaced to ensure optimal braking performance and safety.
Q2 What type of brake fluid should be used in the 2009-2016 Audi A4?
What type of brake fluid should be used in the 2009-2016 Audi A4?
The 2009-2016 Audi A4 requires DOT 4 brake fluid. It is important to use only high-quality brake fluid that meets Audi's specifications (VW 501 14) to ensure proper brake system function and avoid damage.
Q3 How often should the brake rotors be inspected on a 2009-2016 Audi A4?
How often should the brake rotors be inspected on a 2009-2016 Audi A4?
Brake rotors should be inspected every 10,000 miles or during every brake pad replacement. The minimum allowable rotor thickness is 22mm for front rotors and 10mm for rear rotors. Rotors should be replaced if they are below these specifications or show signs of warping or cracking.
Q4 What is the torque specification for the brake caliper bolts on a 2009-2016 Audi A4?
What is the torque specification for the brake caliper bolts on a 2009-2016 Audi A4?
The brake caliper bolts on the 2009-2016 Audi A4 should be torqued to 30 Nm (22 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.
Q5 Can I use aftermarket brake components on my 2009-2016 Audi A4?
Can I use aftermarket brake components on my 2009-2016 Audi A4?
While aftermarket brake components can be used, it is highly recommended to use genuine Audi parts or OEM-equivalent parts that meet Audi's specifications. Using non-approved components may affect braking performance, safety, 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.
Audi A4 Brake System Service Manual
Coming SoonOfficial Audi service manual detailing brake system maintenance, repair procedures, and specifications for the 2009-2016 Audi A4.
Brake Fluid Replacement Guide
Coming SoonStep-by-step guide on how to properly replace brake fluid in the 2009-2016 Audi A4, including safety precautions and fluid specifications.
Brake Pad and Rotor Replacement Video Tutorial
Coming SoonVideo tutorial demonstrating the correct procedure for replacing brake pads and rotors on the 2009-2016 Audi A4.
Audi Genuine Brake Parts Catalog
Coming SoonCatalog of genuine Audi brake components, including part numbers and compatibility information for the 2009-2016 Audi A4.
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