Audi Audi A4 2017-present Exhaust Specifications
Detailed technical specifications and documentation for the 2017-Present Audi A4 exhaust system, including components, materials, torque values, and performance data.
Exhaust System Overview Specifications
This document provides a comprehensive overview of the exhaust system specifications for the 2017-Present Audi A4. It includes detailed technical information, key components, and performance metrics. Use this guide to understand the design, functionality, and maintenance requirements of the exhaust system. Refer to the sections below for specific details and use the quick reference section for easy access to key specifications.
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Key Specifications
Back Pressure
0.8 bar (11.6 psi)
Flow Rate
550 L/s
Emissions Standard
Euro 6 / ULEV
Material
High-strength stainless steel
Weight Reduction
10% lighter than previous models
Available Specifications
Exhaust System Components
This section details the key components of the Audi A4 exhaust system, including the exhaust manifold, downpipe, catalytic converter, and muffler. Each component is designed to optimize performance, reduce emissions, and minimize noise.
Exhaust System Components
This section details the key components of the Audi A4 exhaust system, including the exhaust manifold, downpipe, catalytic converter, and muffler. Each component is designed to optimize performance, reduce emissions, and minimize noise.
Exhaust Manifold
- Constructed from high-strength stainless steel
- Features a dual-scroll design for improved turbocharger efficiency
- Equipped with heat shields to reduce thermal radiation
- Designed for optimal flow and reduced back pressure
- Compatible with both gasoline and diesel engines
Downpipe
- Made from high-quality stainless steel for durability
- Features a large-diameter design for increased flow
- Includes a flex section to reduce stress and vibration
- Designed to work seamlessly with the catalytic converter
- Optional high-flow catalytic converter available
Exhaust System Performance
This section provides detailed performance metrics and specifications for the Audi A4 exhaust system. It includes information on back pressure, flow rate, and emissions compliance.
Exhaust System Performance
This section provides detailed performance metrics and specifications for the Audi A4 exhaust system. It includes information on back pressure, flow rate, and emissions compliance.
Performance Metrics
- Back pressure: 0.8 bar (11.6 psi) maximum
- Flow rate: 550 liters per second (L/s)
- Emissions compliance: Euro 6 and ULEV standards
- Noise level: 75 dB(A) at idle, 85 dB(A) at full throttle
- Weight reduction: 10% lighter than previous models
Exhaust System Maintenance
This section outlines the maintenance requirements and recommendations for the Audi A4 exhaust system. Regular maintenance is essential to ensure optimal performance and longevity.
Exhaust System Maintenance
This section outlines the maintenance requirements and recommendations for the Audi A4 exhaust system. Regular maintenance is essential to ensure optimal performance and longevity.
Recommended Maintenance
- Inspect the exhaust system every 15,000 miles
- Replace the catalytic converter every 100,000 miles
- Check for leaks and damage to the exhaust manifold and downpipe
- Clean the muffler and tailpipe annually
- Replace worn-out gaskets and seals as needed
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Component Specifications
Overview
- Type
- Dual Exhaust System
- Configuration
- Dual exhaust with two mufflers
- Platform
- MLB (Modular Longitudinal Matrix)
- Material
- Stainless Steel
- Location
- Rear-mounted
Dimensions
- Exhaust Pipe Diameter
- 2.5 inches (63.5 mm)
- Muffler Size
- 19 inches (483 mm) x 8 inches (203 mm) x 5 inches (127 mm)
- Tailpipe Diameter
- 2.5 inches (63.5 mm)
- Catalytic Converter Size
- 6 inches (152 mm) x 4 inches (102 mm) x 4 inches (102 mm)
- Overall Length
- 88 inches (2235 mm)
- System Weight
- 65 lbs (29.5 kg)
Materials
- Exhaust Pipes
- Stainless Steel (Grade 304)
- Mufflers
- Stainless Steel (Grade 409)
- Catalytic Converter
- Stainless Steel (Grade 410) with ceramic substrate
- Tailpipe Tips
- Stainless Steel (Grade 430) with chrome plating
Features
- Performance
-
- Reduced backpressure for increased power output
- Optimized flow for improved engine efficiency
- Lightweight design for better fuel economy
- Sound
-
- Sport-tuned exhaust note
- Active noise cancellation integration
- Variable exhaust valve system
- Durability
-
- Corrosion-resistant stainless steel construction
- High-temperature resistant materials
- Welded joints for durability
- Aesthetics
-
- Polished chrome-plated tailpipe tips
- Integrated exhaust diffuser design
- Flush-mounted exhaust outlets
Safety Features
- Heat Protection
-
- Heat shields for undercarriage protection
- Insulated exhaust components near fuel tank
- Temperature-resistant exhaust manifold
- Emissions Control
-
- Catalytic converter with oxygen sensor
- Secondary air injection system
- Emissions monitoring system
- Leak Detection
- Integrated exhaust gas recirculation (EGR) system
Comfort Features
- Noise Reduction
-
- Acoustic insulation in mufflers
- Sound-dampening materials
- Active noise cancellation system
- Temperature Control
-
- Cooling system integration
- Exhaust heat management
- Cabin heat shielding
- Aesthetic integration
-
- Matching exhaust tips with trim
- Flush exhaust outlets with bumper
- Aerodynamic diffuser design
Accessories
- Optional Components
-
- Performance exhaust upgrade
- Stainless steel exhaust tip set
- Exhaust system heat shield kit
- Aftermarket Support
-
- Compatibility with aftermarket catalytic converters
- Approved performance mufflers
- Exhaust tuning software
- Appearance Packages
-
- Carbon fiber exhaust tips
- Black chrome exhaust finish
- Sport exhaust system with valve control
Maintenance
- Service interval
- Every 15,000 miles (24,140 km) or 12 months
- Items To inspect
-
- Exhaust pipes for leaks or damage
- Mufflers and catalytic converter for efficiency
- Tailpipe tips for corrosion
- Exhaust system mounts for wear
- Replacement Schedule
-
- Catalytic converter at 120,000 miles (193,121 km)
- Mufflers at 80,000 miles (128,747 km)
- Exhaust pipes at 100,000 miles (160,934 km)
- Maintenance Notes
- Inspect exhaust system during routine oil changes. Replace gaskets and seals as needed.
Warranty
- Basic Warranty
- Miles: 48,000 milesYears: 4 yearsCoverage: Exhaust system components
- Powertrain Warranty
- Miles: 70,000 milesYears: 5 yearsCoverage: Catalytic converter and muffler
- Corrosion Perforation Warranty
- Miles: 120,000 milesYears: 12 yearsCoverage: Exhaust system perforation
- Emissions Warranty
- Miles: 98,000 milesYears: 8 yearsCoverage: Catalytic converter and emissions control devices
Production Details
- Manufacturer
- Audi AG
- Manufacturing Process
-
- Robotically welded seams
- Precision mandrel bending
- High-temperature material forming
- Catalytic converter substrate coating
- Quality Control
- inspection: Leak testing and acoustic analysisTesting: Durability testing (salt spray, vibration, thermal cycling)Certification: Compliance with EU and EPA emissions standards
- Sustainability Practices
-
- Recyclable stainless steel materials
- Emissions reduction in manufacturing
- Energy-efficient production processes
- Production Metrics
- Units Per Year: Over 100,000 units annuallyManufacturing Facility: Audi Hungaria Zrt., Győr, HungarySupplier Partners: Bosch, Faurecia, Tenneco Automotive
Service Information for Exhaust System Service
Maintenance and service requirements specific to the Audi A4 exhaust system
- Inspect exhaust system for leaks or damage
- Check exhaust mounts and hangers
- Verify catalytic converter efficiency
- Clean exhaust system components if necessary
Conduct inspection during routine maintenance
- Replace exhaust system gaskets
- Inspect muffler and tailpipe for corrosion
- Check exhaust valve operation
- Test emissions system performance
Use factory-approved replacement parts
- Replace catalytic converter if necessary
- Inspect exhaust pipes for wear
- Check muffler and resonator condition
- Perform emissions system test
Special tools may be required for catalytic converter replacement
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What is the exhaust system configuration for the 2017-Present Audi A4?
What is the exhaust system configuration for the 2017-Present Audi A4?
The 2017-Present Audi A4 features a dual exhaust system with a single tailpipe on each side. The system includes a catalytic converter, a resonator, and a muffler. The exhaust pipes are made of stainless steel, with a diameter of 60mm for the 2.0TFSI engine variant.
Q2 What is the recommended maintenance schedule for the exhaust system?
What is the recommended maintenance schedule for the exhaust system?
Audi recommends inspecting the exhaust system every 15,000 miles or annually, whichever comes first. Key checks include inspecting for leaks, corrosion, and ensuring all mounting brackets and hangers are secure. The catalytic converter should be checked for proper function during routine emissions testing.
Q3 Can I install an aftermarket exhaust system on my Audi A4?
Can I install an aftermarket exhaust system on my Audi A4?
While aftermarket exhaust systems are available, Audi strongly recommends using genuine OEM parts to maintain performance, emissions compliance, and warranty coverage. Aftermarket systems may void the warranty and could require recalibration of the engine control unit (ECU).
Q4 What are the torque specifications for the exhaust manifold bolts?
What are the torque specifications for the exhaust manifold bolts?
The exhaust manifold bolts on the 2017-Present Audi A4 2.0TFSI engine should be torqued to 25 Nm (18.4 lb-ft) in a crisscross pattern to ensure even pressure distribution. Always use a calibrated torque wrench and follow the manufacturer's service manual.
Q5 How do I identify a failing catalytic converter?
How do I identify a failing catalytic converter?
Symptoms of a failing catalytic converter include reduced engine performance, increased exhaust emissions, a sulfur-like smell, and the illumination of the check engine light. Diagnostic trouble codes (DTCs) such as P0420 (Catalyst System Efficiency Below Threshold) may also be present.
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 Exhaust System Service Manual
Coming SoonOfficial Audi service manual detailing exhaust system components, maintenance procedures, and troubleshooting steps.
Exhaust System Maintenance Guide
Coming SoonComprehensive guide on maintaining and inspecting the exhaust system, including common issues and solutions.
Genuine Audi Exhaust Parts Catalog
Coming SoonCatalog of OEM exhaust components for the 2017-Present Audi A4, including part numbers and compatibility details.
Emissions Compliance and Testing
Coming SoonInformation on emissions standards, testing procedures, and how the exhaust system impacts compliance.
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