Audi Audi Q7 2015-present

Audi Audi Q7 2015-present Exhaust Specifications

Comprehensive technical specifications for the 2015-Present Audi Q7 exhaust system, including detailed information on components, materials, torque values, and emissions compliance.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the exhaust specifications for the 2015-Present Audi Q7, including key features, measurements, and technical details. This section provides detailed insights into 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,' 'muffler,' or 'exhaust pipe diameter.'

Navigate through the exhaust documentation sections using the table of contents or by scrolling through the major sections and subsections.

Key Specifications

Exhaust Pipe Diameter

2.5 inches

Catalytic Converter Efficiency

>95%

Muffler Weight

15 lbs

Exhaust Tip Diameter

3.5 inches

Backpressure at 6000 RPM

<1.5 psi

Available Specifications

Exhaust System Overview

This section covers the general structure and components of the Audi Q7 exhaust system, including materials, layout, and integration with the vehicle's engine and chassis.

Exhaust System Layout

Dual exhaust system with separate pipes for each bank of the V6/V8 engine
Stainless steel construction for durability and corrosion resistance
Integrated catalytic converters for emissions control
Rear-mounted mufflers with quad exhaust tips for enhanced aesthetics

Material Specifications

Primary exhaust pipes: 2.5-inch diameter, 409-grade stainless steel
Muffler casing: 304-grade stainless steel
Exhaust tips: Chrome-plated stainless steel
Heat shields: Aluminum with ceramic coating

Note: The use of stainless steel ensures longevity and resistance to high temperatures and corrosion.

Catalytic Converters

This section details the catalytic converters used in the Audi Q7, including their design, efficiency, and compliance with emissions standards.

Catalytic Converter Design

Dual catalytic converters (one per exhaust bank)
Honeycomb ceramic substrate with platinum, palladium, and rhodium coating
Operating temperature range: 400°C to 800°C
Compliance with Euro 6 and EPA Tier 3 emissions standards

Performance Specifications

Conversion efficiency: >95% for CO, HC, and NOx
Backpressure: <1.5 psi at 6000 RPM
Service life: 150,000 miles or 10 years
Oxygen sensor integration for real-time emissions monitoring

Muffler and Resonator

This section provides information on the muffler and resonator components, including their design, sound attenuation, and performance characteristics.

Muffler Design

Chambered muffler design for optimal noise reduction
Internal baffles and perforated tubes for sound attenuation
Exterior dimensions: 24 x 12 x 8 inches
Weight: 15 lbs (per muffler)

Resonator Specifications

Helmholtz resonator for canceling specific frequencies
Integrated into the mid-pipe section
Dimensions: 18 x 6 x 6 inches
Weight: 8 lbs

Note: The resonator is designed to reduce drone and improve exhaust note quality.

Exhaust Tips and Aesthetics

This section covers the design and specifications of the exhaust tips, focusing on their role in enhancing the vehicle's appearance and exhaust flow.

Exhaust Tip Design

Quad exhaust tips with a diameter of 3.5 inches
Chrome-plated finish for a premium look
Slanted cut design for improved aerodynamics
Integrated heat shields to protect surrounding components

Installation and Alignment

Tips are welded to the muffler outlet for secure attachment
Alignment ensures symmetrical appearance from the rear
Clearance from rear bumper: 1.5 inches
Adjustable mounting brackets for precise positioning

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Component Specifications

General Specifications

Material: Stainless steel

System Type: Dual exhaust with rear muffler

Emission Standard: Euro 6

Catalyst Type: Three-way catalytic converter

Part Number: 4M0253609A

Exhaust Manifold

Material: Cast iron

Bolt Torque: 25 Nm + 90°

Gasket Part Number: 07L253039A

Heat Shield Material: Aluminized steel

Heat Shield Part Number: 4M0253821B

Catalytic Converter

Type: Three-way catalytic converter

Substrate Material: Ceramic

Precious Metals

Platinum
Palladium
Rhodium

Operating Temperature: 400-800°C

Part Number: 4M0254105C

Replacement interval: 120,000 miles

Muffler

Type: Rear muffler with dual outlets

Material: Stainless steel

Dimensions: 800mm x 300mm x 200mm

Weight: 12.5 kg

Part Number: 4M0253609B

Noise Reduction: 25 dB

Exhaust Pipes

Material: Stainless steel

Diameter: 70 mm

Wall Thickness: 1.5 mm

Flex Pipe Part Number: 4M0253115A

Clamp Part Number: N90765301

Oxygen Sensors

Type: Wideband lambda sensor

Location

Pre-catalyst
Post-catalyst

Operating Temperature: -40°C to 900°C

Part Number

06E906262B
06E906262C

Replacement interval: 100,000 miles

Exhaust Mounts

Material: Rubber with steel inserts

Quantity: 4

Part Number: 4M0253141A

Torque Specification: 22 Nm

inspection Interval: Every 30,000 miles

Exhaust Tips

Material: Polished stainless steel

Diameter: 90 mm

Length: 150 mm

Part Number: 4M0253809A

Finish: Chrome-plated

Emission Control

System Type: EGR with AdBlue injection

Adblue Tank Capacity: 20 liters

Adblue Consumption Rate: 1.5 liters per 1,000 miles

Part Number: 4M0131200A

Maintenance Interval: Every 10,000 miles

Diagnostic Specifications

Fault Codes

P0420
P0430
P0135
P0141

Diagnostic Tool: VAS 6154

Sensor Resistance: 6-20 ohms

Voltage Range: 0.1-0.9 V

inspection Procedure: Check for exhaust leaks, sensor readings, and catalyst efficiency

Service Information Service

Detailed service requirements and schedules for the exhaust system

10,000

Inspect exhaust system for leaks and damage
Check oxygen sensor readings
Inspect AdBlue system for proper operation

Ensure all clamps and mounts are secure

30,000

Inspect catalytic converter for efficiency
Check exhaust mounts for wear
Inspect flex pipe for cracks

Replace any worn or damaged components

100,000

120

Replace oxygen sensors
Inspect and clean exhaust tips
Check entire exhaust system for corrosion

Use OEM parts for replacements

Frequently Asked Questions

Find answers to common questions about torque specifications

What is the exhaust system configuration for the 2015-Present Audi Q7?

The 2015-Present Audi Q7 features a dual exhaust system with a split configuration, depending on the engine variant. For the 3.0L TFSI V6, it includes dual tailpipes with a diameter of 70mm each. The 4.0L TFSI V8 model features a quad-tip exhaust with 75mm diameter pipes. Both systems are designed for optimal backpressure reduction and performance.

What materials are used in the Audi Q7 exhaust system?

The Audi Q7 exhaust system is constructed using high-grade stainless steel for durability and corrosion resistance. The mufflers and catalytic converters are made from heat-resistant alloys, while the exhaust tips are polished stainless steel for aesthetic appeal and longevity.

How often should the exhaust system be inspected?

Audi recommends inspecting the exhaust system every 15,000 miles or during routine maintenance intervals. Key areas to check include the catalytic converter, oxygen sensors, and exhaust hangers for signs of wear, corrosion, or damage.

What is the backpressure specification for the Audi Q7 exhaust system?

The backpressure for the Audi Q7 exhaust system should not exceed 1.5 psi (10.3 kPa) at idle and 3.0 psi (20.7 kPa) under full load. Exceeding these values may indicate a blockage or restriction in the system.

Can aftermarket exhaust systems affect the Audi Q7's warranty?

Yes, installing non-genuine or aftermarket exhaust components may void the vehicle's warranty, particularly if the modification causes damage to the engine or emissions system. Always consult your Audi dealer before making any modifications.

What are the torque specifications for exhaust manifold bolts?

The exhaust manifold bolts on the Audi Q7 should be torqued to 22 Nm (16.2 lb-ft) for the 3.0L TFSI V6 and 25 Nm (18.4 lb-ft) for the 4.0L TFSI V8. Ensure the engine is cool before tightening to avoid warping the manifold.

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 Q7 Exhaust System Service Manual

Coming Soon

Official Audi service manual detailing exhaust system maintenance, repair procedures, and specifications for the 2015-Present Q7.

Exhaust System Troubleshooting Guide

Coming Soon

Step-by-step guide to diagnosing common exhaust system issues, including noise, leaks, and performance problems.

Genuine Audi Exhaust Parts Catalog

Coming Soon

Catalog of OEM Audi exhaust components, including mufflers, catalytic converters, and exhaust tips for the Q7.

Audi Q7 Emissions Compliance Guide

Coming Soon

Detailed information on the Q7's exhaust system compliance with global emissions standards, including EURO 6 and EPA Tier 3.

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