Audi Audi S3 1999-2003 Brakes Specifications
Detailed technical specifications for the 1999-2003 Audi S3 brakes system, including component details, performance metrics, and maintenance guidelines. Ideal for technicians and enthusiasts.
Overview Specifications
Comprehensive description of the brakes specifications for the 1999-2003 Audi S3, 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 documentation sections using the table of contents or by scrolling through the major sections and subsections.
Key Specifications
Front Brake Disc Diameter
312 mm
Rear Brake Disc Diameter
256 mm
Brake Fluid Type
DOT 4
Master Cylinder Bore Diameter
22.2 mm
Parking Brake Cable Tension
50-70 N
Available Specifications
Front Brake System
Detailed information about the front brake system, including disc size, caliper type, and pad specifications
Front Brake System
Detailed information about the front brake system, including disc size, caliper type, and pad specifications
Brake Disc Specifications
- Diameter: 312 mm
- Thickness: 25 mm
- Material: Ventilated cast iron
- Minimum thickness after wear: 22 mm
Brake Caliper Details
- Type: Single-piston floating caliper
- Caliper material: Aluminum alloy
- Piston diameter: 57 mm
- Mounting: Bolted to the hub carrier
Note: Ensure proper torque when mounting the caliper to avoid leaks or misalignment.
Brake Pad Specifications
- Pad material: Semi-metallic
- Pad thickness (new): 12 mm
- Minimum pad thickness: 3 mm
- Pad area: 48 cm²
Rear Brake System
Technical details of the rear brake system, including disc dimensions, caliper design, and pad measurements
Rear Brake System
Technical details of the rear brake system, including disc dimensions, caliper design, and pad measurements
Brake Disc Specifications
- Diameter: 256 mm
- Thickness: 12 mm
- Material: Solid cast iron
- Minimum thickness after wear: 10 mm
Brake Caliper Details
- Type: Single-piston floating caliper
- Caliper material: Aluminum alloy
- Piston diameter: 38 mm
- Mounting: Bolted to the rear axle
Brake Pad Specifications
- Pad material: Organic
- Pad thickness (new): 10 mm
- Minimum pad thickness: 2 mm
- Pad area: 32 cm²
Note: Organic pads provide quieter operation but may wear faster under heavy use.
Brake Hydraulics
Information about the hydraulic system, including master cylinder, brake lines, and fluid specifications
Brake Hydraulics
Information about the hydraulic system, including master cylinder, brake lines, and fluid specifications
Master Cylinder
- Bore diameter: 22.2 mm
- Type: Tandem master cylinder
- Reservoir capacity: 500 ml
- Material: Aluminum
Brake Lines
- Material: Reinforced rubber with steel braiding
- Length (front): 1.2 m
- Length (rear): 1.5 m
- Operating pressure: 120 bar
Brake Fluid
- Type: DOT 4
- Boiling point (dry): 230°C
- Boiling point (wet): 155°C
- Recommended change interval: Every 2 years or 30,000 km
Note: Always use fresh brake fluid to maintain optimal braking performance.
Parking Brake
Details about the parking brake system, including cable type, lever mechanism, and adjustment specifications
Parking Brake
Details about the parking brake system, including cable type, lever mechanism, and adjustment specifications
Cable System
- Type: Bowden cable
- Cable length: 1.8 m
- Material: Steel with PVC coating
- Tension adjustment: Manual via adjuster nut
Lever Mechanism
- Lever ratio: 4:1
- Material: Steel
- Mounting: Center console
- Travel distance: 6 clicks
Adjustment Specifications
- Cable tension: 50-70 N
- Lever force: 150-200 N
- Engagement point: 30-40% of lever travel
Note: Ensure proper cable tension to avoid excessive wear or insufficient braking.
Search Specifications
Search by specification name, value, or description
Type to search through torque specifications. Results will appear below as you type.
Brakes Specifications
Brake System Type
- System
- Hydraulic dual-circuit with diagonal split
- Assistance
- Vacuum servo-assisted
- ABS
- Bosch 5.3 ABS with Electronic Brake Force Distribution (EBD)
Front Brakes
- Type
- Ventilated discs
- Disc Diameter
- 312 mm
- Disc Thickness
- 25 mm
- Minimum Disc Thickness
- 23 mm
- Caliper Type
- Single-piston floating caliper
- Pad Material
- Sintered metal
- Pad Thickness New
- 14 mm
- Pad Thickness Minimum
- 2 mm
- Part Number Disc
- 8N0 615 301
- Part Number Pads
- 8N0 698 151
Rear Brakes
- Type
- Solid discs
- Disc Diameter
- 232 mm
- Disc Thickness
- 9 mm
- Minimum Disc Thickness
- 7 mm
- Caliper Type
- Single-piston floating caliper
- Pad Material
- Organic
- Pad Thickness New
- 12 mm
- Pad Thickness Minimum
- 2 mm
- Part Number Disc
- 8N0 615 601
- Part Number Pads
- 8N0 698 451
Brake Fluid
- Type
- DOT 4
- Capacity
- 1.0 liter
- Replacement interval
- Every 2 years or 30,000 miles
- Specification
- ISO 4925 Class 4
Parking Brake
- Type
- Mechanical, cable-operated
- Activation
- Hand lever
- Cable Adjustment
- Automatic self-adjusting
- Part Number Cable
- 8N0 609 721
Brake Pedal
- Pedal Travel
- Maximum 150 mm
- Free Play
- 3-5 mm
- Force Required
- Approximately 400 N for full braking
ABS System
- Control Unit
- Bosch 5.3
- Sensor Type
- Inductive
- Wheel Sensor Air Gap
- 0.3-1.1 mm
- Part Number Control Unit
- 8N0 907 379
Brake Hoses
- Material
- Reinforced rubber
- Front Length
- 450 mm
- Rear Length
- 600 mm
- Burst Pressure
- Minimum 200 bar
- Part Number Front
- 8N0 611 771
- Part Number Rear
- 8N0 611 772
Brake Rotor Runout
- Front Max Runout
- 0.05 mm
- Rear Max Runout
- 0.05 mm
- Measurement Method
- Dial indicator at 10 mm from outer edge
Brake Pressure
- Front Circuit Pressure
- 120 bar
- Rear Circuit Pressure
- 80 bar
- Testing Equipment
- Pressure gauge with adapter 8N0 612 001
Diagnostic Specifications
- ABS Fault Codes
- Readable via VAG-COM or OBD-II scanner
- Common Faults
-
- Wheel speed sensor failure
- ABS pump motor malfunction
- Brake light switch failure
- Diagnostic Tool
- VAG-COM recommended
Service Information Service
Detailed service requirements and schedules for the brake system
- 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
- Replace brake fluid
- Inspect ABS system for faults
- Check parking brake adjustment
Use only Audi-approved DOT 4 brake fluid
- Replace front and rear brake pads
- Inspect brake discs for thickness and runout
- Check brake caliper operation
Replace discs if thickness is below minimum specification
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the brake disc diameter and thickness for the 1999-2003 Audi S3?
What is the brake disc diameter and thickness for the 1999-2003 Audi S3?
The front brake discs for the 1999-2003 Audi S3 have a diameter of 312 mm and a thickness of 25 mm. The rear brake discs have a diameter of 256 mm and a thickness of 22 mm. Always ensure replacements meet these specifications.
Q2 What type of brake pads are recommended for the Audi S3?
What type of brake pads are recommended for the Audi S3?
The 1999-2003 Audi S3 requires low-metallic or ceramic brake pads for optimal performance. Genuine Audi brake pads are recommended to ensure compatibility and safety. Aftermarket pads must meet Audi's TÜV certification standards.
Q3 How often should the brake fluid be replaced on the Audi S3?
How often should the brake fluid be replaced on the Audi S3?
Audi recommends replacing the brake fluid every 2 years or 30,000 miles, whichever comes first. Use only DOT 4 brake fluid with a minimum boiling point of 230°C (446°F) to maintain braking performance and safety.
Q4 What is the recommended brake pad wear limit for the Audi S3?
What is the recommended brake pad wear limit for the Audi S3?
The brake pads should be replaced when the friction material thickness is less than 3 mm. Inspect pads regularly, as aggressive driving or harsh conditions may accelerate wear.
Q5 Can I upgrade the brakes on my 1999-2003 Audi S3?
Can I upgrade the brakes on my 1999-2003 Audi S3?
Yes, the Audi S3 can accommodate performance brake upgrades, such as larger discs or high-performance calipers. However, ensure the upgrades are compatible with the vehicle's ABS and ESP systems. Consult an Audi specialist for proper installation and calibration.
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 S3 Brake System Service Manual
Coming SoonOfficial Audi service manual detailing brake system maintenance, repair, and specifications for the 1999-2003 S3.
Brake Pad Replacement Guide
Coming SoonStep-by-step guide for replacing brake pads on the 1999-2003 Audi S3, including torque specifications and safety precautions.
Brake Fluid Compatibility Chart
Coming SoonA comprehensive chart listing approved brake fluids for the Audi S3, including DOT 4 specifications and performance ratings.
Performance Brake Upgrade Options
Coming SoonDetailed overview of aftermarket and OEM performance brake upgrades for the 1999-2003 Audi S3, including compatibility and installation tips.
About the Author
Expert automotive knowledge and experience
'/%3E%3Cpath d='M60 30a20 20 0 1 1 0 40 20 20 0 0 1 0-40zm0 45c16.5 0 30 7.5 30 16.8V100H30v-8.2c0-9.3 13.5-16.8 30-16.8z' fill='%23404040'/%3E%3C/svg%3E)
Diagnostic
Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.
Repair
Expert in both traditional mechanical repairs and modern vehicle systems.
Additional Expertise
Documentation
Created over 500 detailed repair guides and technical documents.
Training
Conducted technical training sessions and contributed to repair databases.
Certifications & Research
Certifications
- ASE Master Technician Certification
- Advanced Diagnostic Specialist
- Hybrid/Electric Vehicle Systems
- Performance Tuning Expert
Research & Community
Actively researches emerging technologies and contributes to automotive forums.
Legal Disclaimer
Important information about using this content
Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.
General Information
Warranty & Liability
The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.
We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.
Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.