Audi Audi A4 2005-2008 Brakes Specifications
Detailed technical specifications and service information for the 2005-2008 Audi A4 braking system, including rotors, calipers, pads, ABS, and torque values.
Brake System Overview Specifications
This document provides a comprehensive overview of the brake system specifications for the 2005-2008 Audi A4. It includes detailed information about components, maintenance, and key specifications. Use this guide to understand the braking system's technical aspects, perform routine maintenance, and reference key specifications quickly.
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Key Brake Specifications
Front Brake Rotor Diameter
312 mm
Rear Brake Rotor Diameter
272 mm
Brake Pad Replacement Interval
30,000 - 50,000 miles
Brake Fluid Type
DOT 4
ABS System
Standard on all models
Available Specifications
Brake System Overview
The Audi A4 from 2005 to 2008 features a robust braking system designed for optimal performance and safety. This section provides an overview of the key components and their functions within the brake system.
Brake System Overview
The Audi A4 from 2005 to 2008 features a robust braking system designed for optimal performance and safety. This section provides an overview of the key components and their functions within the brake system.
Front Brake Components
- Ventilated discs with a diameter of 312 mm
- Floating calipers with piston count depending on the model
- High-performance brake pads designed for consistency and durability
- Stainless steel brake lines for enhanced durability
- ABS sensors integrated into the wheel hubs
Rear Brake Components
- Solid discs with a diameter of 272 mm
- Floating calipers with a single piston setup
- Standard brake pads suitable for everyday driving
- Rear wheel ABS sensors for improved stability
- Emergency brake assist integration
Brake Types and Configurations
The Audi A4 from 2005 to 2008 offers different brake configurations depending on the model and trim level. This section details the various types of brakes available and their specifications.
Brake Types and Configurations
The Audi A4 from 2005 to 2008 offers different brake configurations depending on the model and trim level. This section details the various types of brakes available and their specifications.
Base Model Brakes
- Front discs: 312 mm ventilated
- Rear discs: 272 mm solid
- Standard brake pads with metallic composition
- Single-piston rear calipers
- ABS as a standard feature
Sport Model Brakes
- Front discs: 320 mm ventilated
- Rear discs: 278 mm solid
- High-performance brake pads with ceramic composition
- Dual-piston front calipers
- Optional rear disc cooling
Maintenance and Servicing
Proper maintenance is crucial for the optimal performance of the brake system. This section outlines the recommended service intervals and procedures for the Audi A4 brakes.
Maintenance and Servicing
Proper maintenance is crucial for the optimal performance of the brake system. This section outlines the recommended service intervals and procedures for the Audi A4 brakes.
Brake Pad Replacement
- Front brake pads: Replace every 30,000 to 50,000 miles
- Rear brake pads: Replace every 50,000 to 70,000 miles
- Always replace pads in pairs to maintain even braking
- Use Audi-approved brake pads for optimal performance
- Inspect pads during routine services
Brake Rotor Maintenance
- Inspect front rotors every 15,000 miles
- Inspect rear rotors every 30,000 miles
- Replace rotors if thickness is below 3 mm
- Resurface rotors if warping is detected
- Clean rotors when replacing pads
Brake Fluid Replacement
- Replace brake fluid every 2 years or 30,000 miles
- Use Audi-approved DOT 4 brake fluid
- Bleed the brake system after fluid replacement
- Check for fluid leaks during replacement
- Dispose of old fluid responsibly
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Brakes Specifications
Overview
- Type
- disc brakes front and rear
- Configuration
- dual-circuit system with diagonal split
- Platform
- Audi B7 platform
- Material
- cast iron and aluminum components
- Location
- front and rear axles
Dimensions
- Front Rotor Diameter
- 12.3 inches (312 mm)
- Rear Rotor Diameter
- 11.0 inches (280 mm)
- Front Rotor Thickness
- 1.1 inches (28 mm)
- Rear Rotor Thickness
- 0.8 inches (20 mm)
- Brake Pad Thickness
- 0.4 inches (10 mm)
- Rear Drum Diameter
- 10.2 inches (260 mm)
- Master Cylinder Bore Diameter
- 1.0 inch (25.4 mm)
- Parking Brake Diameter
- 8.7 inches (221 mm)
Materials
- Rotors
- cast iron
- Brake Pads
- semi-metallic
- Calipers
- aluminum alloy
- Brake Hoses
- reinforced rubber
Features
- Front Brake Features
-
- ventilated rotors
- floating calipers
- anodized protection
- Rear Brake Features
-
- solid rotors
- fixed calipers
- integral park brake
- System Features
-
- anti-lock braking system (ABS)
- electronic brake distribution (EBD)
- brake assist
- Additional Features
-
- electronic parking brake
- automatic brake drying
- fade compensation
Safety Features
- ABS
- standard
- EBD
- standard
- Brake Assist
- standard
- Manual Brake Bias Adjustment
- available
Comfort Features
- Power Brake Servo
- standard
- Self Adjusting Brakes
- standard
- Dual Circuit Brake System
- standard
- Electronic Brake Features
- standard
Accessories
- Performance Accessories
-
- high-performance brake pads
- cross-drilled rotors
- braided steel brake hoses
- performance brake fluid
- Replacement Accessories
-
- OE-spec brake pads
- OE-spec rotors
- brake hardware kit
- brake wear sensors
- Upgrade Accessories
-
- big brake kits
- upgraded calipers
- performance brake rotors
- high-temperature brake fluid
Maintenance
- Service interval
- 15,000 miles / 12 months
- Service Items
-
- brake pad inspection
- rotor inspection
- brake fluid check
- parking brake adjustment
- hose and line inspection
- bleed brakes if necessary
- Maintenance Notes
- Replace brake pads when worn below 1/8 inch. Inspect rotors for warping or excessive wear. Check brake fluid level and condition.
Warranty
- New Vehicle Warranty
- Miles: 50,000 milesYears: 4 yearsCoverage: parts and labor
- Wear Item Warranty
- Miles: 24,000 milesYears: 2 yearsCoverage: brake pads and rotors
- Corrosion Warranty
- Miles: unlimitedYears: 12 yearsCoverage: brake components
- Accessories Warranty
- Miles: 24,000 milesYears: 2 yearsCoverage: accessories and parts
Production Details
- Manufacturer
- Audi AG
- Manufacturing Process
-
- CNC machining of rotors
- aluminum casting for calipers
- assembly with OE specifications
- quality control inspection
- Quality Control
- inspections: dimensional and functional testingCertifications: ISO 9001:2015Standards: DIN and SAE standards
- Sustainability Practices
- Use of recyclable materials, energy-efficient manufacturing processes
- Production Metrics
- High-volume production with precision tolerances, focus on reliability and durability
Service Information for brakes Service
Maintenance and service requirements specific to this component
- Inspect brake pads for wear
- Check rotor thickness and surface condition
- Test brake fluid for moisture content
- Inspect brake hoses and lines
- Bleed brakes if new fluid is installed
Replace brake pads if worn below 1/8 inch. Clean and lubricate brake hardware.
- Replace brake pads if necessary
- Resurface or replace rotors if warped or worn
- Inspect parking brake components
- Check ABS sensor functionality
- Test brake system for leaks
Use a brake lathe for resurfacing rotors. Replace rotors if thickness is below minimum specification.
- Replace brake fluid
- Inspect and clean brake calipers
- Lubricate brake sliders and pins
- Check brake pedal feel and adjustment
- Test emergency brake function
Use synthetic brake fluid meeting Audi specifications. Bleed system thoroughly after fluid replacement.
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the recommended brake pad thickness for the 2005-2008 Audi A4?
What is the recommended brake pad thickness for the 2005-2008 Audi A4?
The recommended minimum brake pad thickness for the 2005-2008 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 is recommended for the 2005-2008 Audi A4?
What type of brake fluid is recommended for the 2005-2008 Audi A4?
Audi recommends using DOT 4 brake fluid for the 2005-2008 Audi A4. The brake fluid should meet the VW 501.14 specification. It is important to replace the brake fluid every 2 years or 30,000 miles, whichever comes first, to maintain braking efficiency.
Q3 What is the brake rotor thickness specification for the 2005-2008 Audi A4?
What is the brake rotor thickness specification for the 2005-2008 Audi A4?
The minimum allowable brake rotor thickness for the 2005-2008 Audi A4 is 22mm for the front rotors and 10mm for the rear rotors. Rotors should be replaced if they are worn below these specifications or if they exhibit significant scoring or warping.
Q4 How often should the brake system be inspected on a 2005-2008 Audi A4?
How often should the brake system be inspected on a 2005-2008 Audi A4?
Audi recommends inspecting the brake system every 10,000 miles or at least once a year. This includes checking brake pad thickness, rotor condition, brake fluid level, and the overall integrity of the brake lines and hoses.
Q5 What is the torque specification for the brake caliper bolts on the 2005-2008 Audi A4?
What is the torque specification for the brake caliper bolts on the 2005-2008 Audi A4?
The torque specification for the brake caliper bolts on the 2005-2008 Audi A4 is 30 Nm (22 ft-lbs) for the front calipers and 35 Nm (26 ft-lbs) for the rear calipers. Proper torque is critical to ensure safe and reliable brake operation.
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 service manual detailing brake system maintenance, repair procedures, and specifications for the 2005-2008 Audi A4.
Brake Fluid Replacement Guide
Coming SoonStep-by-step guide on how to properly replace brake fluid in the 2005-2008 Audi A4, including safety precautions and recommended tools.
Brake Pad and Rotor Replacement Tutorial
Coming SoonComprehensive tutorial on replacing brake pads and rotors for the 2005-2008 Audi A4, including torque specifications and alignment tips.
Audi Genuine Brake Parts Catalog
Coming SoonCatalog of genuine Audi brake parts, including pads, rotors, and calipers, specifically designed for the 2005-2008 Audi A4.
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