Audi Audi S3 1999-2003 Exhaust Specifications
Detailed technical specifications and documentation for the exhaust system of the 1999-2003 Audi S3. Includes component details, torque specifications, and installation guidelines.
Overview Specifications
Comprehensive description of the exhaust specifications for the 1999-2003 Audi S3, including key features, measurements, and technical details. This section covers the exhaust system's design, components, and performance specifications.
How to Use
Use the search function to locate specific exhaust specifications by entering keywords such as 'catalytic converter,' 'downpipe,' or 'muffler.'
Navigate through the exhaust documentation sections using the table of contents or by scrolling through the major sections and subsections.
Key Specifications
Exhaust Diameter
60 mm
Backpressure
0.8 bar
Noise Level
72 dB (idle)
Catalytic Converter Efficiency
95%
Exhaust Temperature
600°C - 900°C
Available Specifications
Exhaust System Overview
This section provides an overview of the Audi S3's exhaust system, including its layout, materials, and key components.
Exhaust System Overview
This section provides an overview of the Audi S3's exhaust system, including its layout, materials, and key components.
System Layout
- Dual exhaust system with two tailpipes
- Stainless steel construction for durability
- Integrated catalytic converter for emissions control
- Downpipe diameter: 60 mm
- Total system length: 3.2 meters
Key Components
- Front pipe with flex joint for vibration reduction
- Main muffler with internal baffles for noise reduction
- Rear muffler with dual outlets
- Oxygen sensors located pre- and post-catalytic converter
- Exhaust hangers made of heat-resistant rubber
Note: The catalytic converter is designed to meet Euro 3 emissions standards.
Performance Specifications
This section details the performance characteristics of the exhaust system, including flow rates, backpressure, and noise levels.
Performance Specifications
This section details the performance characteristics of the exhaust system, including flow rates, backpressure, and noise levels.
Flow and Backpressure
- Maximum exhaust flow rate: 450 CFM (cubic feet per minute)
- Backpressure at full load: 0.8 bar
- Optimized for 1.8L turbocharged engine
- Exhaust gas temperature range: 600°C to 900°C
- Pressure drop across catalytic converter: 0.2 bar
Noise Levels
- Idle noise level: 72 dB
- Full throttle noise level: 92 dB
- Complies with EU noise regulations
- Resonator included to reduce drone
- Muffler designed for sporty yet refined sound
Note: Noise levels measured at 1 meter from the tailpipe.
Maintenance and Service
This section covers maintenance requirements, common issues, and service intervals for the exhaust system.
Maintenance and Service
This section covers maintenance requirements, common issues, and service intervals for the exhaust system.
Service Intervals
- Inspect exhaust system every 15,000 km
- Replace oxygen sensors every 100,000 km
- Check for leaks and corrosion annually
- Tighten exhaust clamps during routine maintenance
- Replace catalytic converter if efficiency drops below 95%
Common Issues
- Corrosion at weld joints in high-humidity environments
- Cracked flex joint due to excessive vibration
- Clogged catalytic converter from oil or fuel contamination
- Loose or broken exhaust hangers
- Excessive noise from damaged muffler internals
Note: Regular inspection can prevent costly repairs.
Technical Specifications
This section provides detailed technical specifications for the exhaust system components.
Technical Specifications
This section provides detailed technical specifications for the exhaust system components.
Component Dimensions
- Downpipe length: 800 mm
- Catalytic converter diameter: 120 mm
- Main muffler volume: 12 liters
- Tailpipe diameter: 70 mm
- Exhaust tip length: 150 mm
Material Specifications
- Stainless steel grade: 409 for corrosion resistance
- Muffler internals: Aluminized steel
- Gaskets: Graphite-impregnated for high-temperature sealing
- Clamps: Stainless steel with T-bolt design
- Heat shields: Aluminum with ceramic coating
Note: All materials are selected for durability and performance.
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Component Specifications
General Specifications
- System Type
- Stainless steel dual exhaust
- Configuration
- Twin-pipe rear exit
- Emission Standard
- EURO 3
- Catalyst Type
- Metal substrate catalytic converter
- Part Number
- 8L0254105A
Exhaust Manifold
- Material
- Cast iron
- Bolt Torque
- 25 Nm
- Gasket Part Number
- 058253039A
- Heat Shield Part Number
- 8L0253117B
- Notes
- Ensure proper alignment during installation to avoid leaks
Catalytic Converter
- Type
- Three-way catalytic converter
- Substrate Material
- Metal
- Cell Density
- 400 cells per square inch
- Part Number
- 8L0254105B
- Operating Temperature
- 400-800°C
- Notes
- Monitor for clogging or damage during routine inspections
Resonator
- Material
- Stainless steel
- Diameter
- 60 mm
- Length
- 300 mm
- Part Number
- 8L0252609C
- Notes
- Inspect for corrosion or internal damage
Muffler
- Material
- Stainless steel
- Diameter
- 70 mm
- Length
- 500 mm
- Part Number
- 8L0252609D
- Mounting Bracket Part Number
- 8L0252695A
- Notes
- Check for rust or perforations during service
Exhaust Pipes
- Material
- Stainless steel
- Diameter
- 50 mm
- Wall Thickness
- 1.5 mm
- Flex Pipe Part Number
- 8L0252691A
- Clamp Part Number
- N90464701
- Notes
- Ensure proper alignment and secure clamping to prevent leaks
Oxygen Sensors
- Pre Cat Sensor Part Number
- 06A906262A
- Post Cat Sensor Part Number
- 06A906262B
- Operating Temperature
- -40 to 900°C
- Voltage Range
- 0.1-0.9 V
- Notes
- Replace sensors every 100,000 miles or as indicated by diagnostics
Exhaust Mounts
- Rubber Mount Part Number
- 8L0252695B
- Bracket Part Number
- 8L0252695C
- Torque Specification
- 22 Nm
- Notes
- Inspect for wear and tear during routine maintenance
Emission Control
- EGR System
- Integrated
- PCV System
- Positive crankcase ventilation
- Evaporative Emission System
- Charcoal canister
- Notes
- Ensure all emission control components are functioning properly
Diagnostic Specifications
- Backpressure Limit
- 0.5 bar
- Exhaust Gas Temperature Limit
- 950°C
- Oxygen Sensor Response Time
- < 100 ms
- Notes
- Use Audi-specific diagnostic tools for accurate readings
Service Information Service
Detailed service requirements and schedules for the exhaust system
- Inspect exhaust system for leaks or damage
- Check oxygen sensor functionality
- Inspect catalytic converter for clogging
Perform visual and functional checks
- Replace oxygen sensors
- Inspect and replace exhaust mounts if necessary
- Check exhaust pipe alignment and clamps
Follow manufacturer guidelines for sensor replacement
- Replace catalytic converter if necessary
- Inspect and replace muffler and resonator if damaged
- Perform full emission system diagnostic
Use Audi-approved parts for replacements
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the diameter of the exhaust pipe on the 1999-2003 Audi S3?
What is the diameter of the exhaust pipe on the 1999-2003 Audi S3?
The exhaust pipe diameter for the 1999-2003 Audi S3 is 60mm. This measurement is consistent across the stock exhaust system, ensuring optimal flow and performance.
Q2 What type of catalytic converter is used in the Audi S3 exhaust system?
What type of catalytic converter is used in the Audi S3 exhaust system?
The 1999-2003 Audi S3 is equipped with a high-flow, ceramic monolith catalytic converter. It is designed to meet Euro 3 emissions standards and is integrated into the downpipe section of the exhaust.
Q3 Can I replace the stock exhaust with an aftermarket system without voiding the warranty?
Can I replace the stock exhaust with an aftermarket system without voiding the warranty?
Replacing the stock exhaust with an aftermarket system may void the warranty if it is not approved by Audi. Always consult your dealer or official documentation before making modifications to ensure compliance with warranty terms.
Q4 What is the recommended service interval for the exhaust system?
What is the recommended service interval for the exhaust system?
Audi recommends inspecting the exhaust system every 30,000 miles or 2 years, whichever comes first. This includes checking for leaks, corrosion, and ensuring all mounting points are secure.
Q5 What material is the exhaust system made of?
What material is the exhaust system made of?
The exhaust system on the 1999-2003 Audi S3 is constructed from stainless steel, providing durability and resistance to corrosion under normal driving conditions.
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 Exhaust System Diagram
Coming SoonDetailed diagram of the exhaust system, including components like the catalytic converter, muffler, and piping.
Exhaust Replacement Guide
Coming SoonStep-by-step guide for replacing the exhaust system on a 1999-2003 Audi S3, including torque specifications and safety precautions.
Exhaust Maintenance Tips
Coming SoonBest practices for maintaining the exhaust system, including cleaning and inspection procedures.
OEM Exhaust Parts Catalog
Coming SoonCatalog of genuine Audi exhaust components for the 1999-2003 S3, ensuring compatibility and performance.
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Technical Information
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