Audi Audi S4 2003-2008

Audi Audi S4 2003-2008 Fuel System Specifications

Detailed technical specifications and documentation for the 2003-2008 Audi S4 fuel system. Includes fuel type, pressure, injector, pump, and system component details for maintenance and repair.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the fuel specifications for the 2003-2008 Audi S4, including key features, measurements, and technical details

How to Use

Use the search function to locate specific fuel specifications by entering keywords such as 'octane rating', 'fuel capacity', or 'emission standards'.

Navigate through the fuel documentation sections using the table of contents or by scrolling through the document. Each section is clearly labeled for easy reference.

Key Specifications

Octane Rating

91 (RON) minimum

Fuel Tank Capacity

64 liters (16.9 gallons)

Fuel Pump Pressure

3.8 bar (55 psi)

CO2 Emissions

249 g/km

Fuel Efficiency

11.5 L/100 km (20.5 mpg)

Available Specifications

Fuel Requirements

Details on the type of fuel required for optimal performance and compliance with emission standards

Octane Rating

Minimum octane rating of 91 (RON)
Premium unleaded gasoline recommended
Higher octane fuels improve performance and reduce knocking
Do not use fuels with octane ratings below 87 (RON)

Fuel Additives

Avoid fuels with metallic additives
Use only approved fuel system cleaners
Additives containing manganese or lead can damage the catalytic converter
Follow manufacturer guidelines for fuel treatments

Note: Using non-recommended additives may void the warranty.

Fuel System Specifications

Technical details about the fuel system components and their specifications

Fuel Tank Capacity

Total fuel tank capacity: 64 liters (16.9 gallons)
Reserve fuel capacity: 8 liters (2.1 gallons)
Fuel tank material: High-density polyethylene
Fuel tank design: Dual-chamber for improved safety

Fuel Pump

Electric fuel pump with a flow rate of 120 liters/hour (31.7 gallons/hour)
Operating pressure: 3.8 bar (55 psi)
Integrated fuel filter with a service interval of 60,000 km (37,282 miles)
Fuel pump relay located in the central electrics panel

Emission Standards

Information on compliance with emission regulations and fuel efficiency

Emission Compliance

Complies with Euro 4 emission standards
Equipped with a catalytic converter and oxygen sensors
Onboard diagnostics (OBD-II) system monitors emissions
CO2 emissions: 249 g/km

Fuel Efficiency

Combined fuel consumption: 11.5 L/100 km (20.5 mpg)
Urban fuel consumption: 15.2 L/100 km (15.5 mpg)
Highway fuel consumption: 8.7 L/100 km (27.0 mpg)
Fuel efficiency optimized for performance and emissions

Note: Fuel efficiency may vary based on driving conditions and maintenance.

Search Specifications

Search by specification name, value, or description

Component Specifications

Fuel Type

Recommended Fuel: Premium unleaded gasoline (91 AKI or 95 RON minimum)

Alternative Fuel: Regular unleaded gasoline (87 AKI or 91 RON) with reduced performance

Ethanol Content: Up to 10% ethanol (E10) allowed

Octane Rating: Minimum 91 AKI (Anti-Knock Index)

Notes: Using fuel with lower octane may cause engine knocking and reduced performance

Fuel System

Fuel Delivery: Direct fuel injection

Fuel Pump Pressure: 5.8 bar (84 psi)

Fuel Filter Part Number: 8E0 201 511 A

Fuel Tank Capacity: 64 liters (16.9 gallons)

Fuel Tank Material: High-density polyethylene (HDPE)

Fuel injectors

Type: Solenoid-operated direct injectors

Flow Rate: 200 cc/min at 3 bar

Part Number: 06E 906 036 C

injection Pressure: Up to 150 bar (2175 psi)

Notes: Injectors are designed for high-pressure operation and precise fuel delivery

Fuel Pump

Type: Electric in-tank fuel pump

Flow Rate: 120 liters/hour (31.7 gallons/hour)

Operating Voltage: 12V DC

Part Number: 8E0 919 051 H

Notes: Fuel pump includes integrated fuel level sensor

Fuel Pressure Regulator

Type: Mechanical diaphragm regulator

Operating Pressure: 5.8 bar (84 psi)

Part Number: 06A 127 025 F

Location: Integrated into the fuel rail

Notes: Maintains consistent fuel pressure for optimal combustion

Fuel Rail

Material: Aluminum alloy

Part Number: 06E 133 201 D

Pressure Rating: Up to 200 bar (2900 psi)

Notes: Designed to withstand high-pressure fuel delivery

Fuel Filter

Type: In-line fuel filter

Filtration Rating: 10 microns

Replacement interval: Every 60,000 miles or 5 years

Part Number: 8E0 201 511 A

Notes: Filters contaminants to protect fuel injectors and pump

Fuel Tank Ventilation

Type: Evaporative emissions control system (EVAP)

Charcoal Canister Part Number: 8E0 201 801 C

Vent Valve Part Number: 06E 906 517 A

Notes: Prevents fuel vapors from escaping into the atmosphere

Fuel System Diagnostics

Diagnostic Tool: VAG-COM or compatible OBD-II scanner

Common Codes

P0171
P0174
P0191
P0192
P0193

Notes: Codes indicate issues such as lean fuel mixture, fuel pressure sensor faults, or injector malfunctions

Fuel System Maintenance

injector Cleaning Interval: Every 30,000 miles or as needed

Fuel Filter Replacement interval: Every 60,000 miles or 5 years

Fuel System Cleaner Part Number: G 001 770 A2

Notes: Regular maintenance ensures optimal fuel system performance and longevity

Service Information Service

Detailed service requirements and schedules for the fuel system

30,000 miles

24 months

Inspect fuel lines and connections for leaks
Check fuel injectors for proper operation
Use fuel system cleaner to remove deposits

Regular inspection prevents fuel system issues

60,000 miles

60 months

Replace fuel filter
Inspect fuel pump and pressure regulator
Check EVAP system for proper operation

Critical maintenance to ensure fuel system reliability

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of fuel is recommended for the 2003-2008 Audi S4?

The 2003-2008 Audi S4 requires premium unleaded gasoline with an octane rating of 91 or higher. Using lower octane fuel can result in reduced performance and potential engine knocking.

What is the fuel tank capacity of the 2003-2008 Audi S4?

The fuel tank capacity for the 2003-2008 Audi S4 is 16.4 gallons (62 liters). This allows for a balance between range and vehicle weight.

Can I use ethanol-blended fuel in my 2003-2008 Audi S4?

The 2003-2008 Audi S4 is compatible with ethanol-blended fuels containing up to 10% ethanol (E10). Higher ethanol blends, such as E15 or E85, are not recommended as they can cause damage to the fuel system and engine components.

What is the fuel economy of the 2003-2008 Audi S4?

The 2003-2008 Audi S4 has an estimated fuel economy of 14 mpg in the city and 21 mpg on the highway, depending on driving conditions and maintenance. The 4.2L V8 engine is performance-oriented, which impacts fuel efficiency.

How often should I replace the fuel filter on my 2003-2008 Audi S4?

Audi recommends inspecting the fuel filter every 40,000 miles and replacing it if necessary. However, if you notice reduced engine performance or fuel delivery issues, inspect and replace the fuel filter immediately.

What are the consequences of using incorrect fuel in the 2003-2008 Audi S4?

Using incorrect fuel, such as diesel or low-octane gasoline, can cause severe engine damage, including knocking, misfires, and potential failure of the fuel injection system. Always use premium unleaded gasoline with an octane rating of 91 or higher.

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 S4 Owner's Manual (2003-2008)

Coming Soon

The official owner's manual provides detailed information on fuel specifications, maintenance schedules, and safety precautions specific to the 2003-2008 Audi S4.

Audi Fuel System Maintenance Guide

Coming Soon

A comprehensive guide on maintaining the fuel system, including fuel filter replacement, fuel injector cleaning, and troubleshooting common fuel-related issues.

Audi Genuine Parts Catalog

Coming Soon

Access the official Audi parts catalog to find genuine fuel system components, including fuel filters, fuel pumps, and injectors, ensuring optimal performance and warranty compliance.

Audi Technical Service Bulletins (TSBs)

Coming Soon

Review technical service bulletins related to the fuel system for the 2003-2008 Audi S4, including updates, recalls, and recommended service procedures.

About the Author

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