2004-2008 Audi A4 S4 Quattro Repair Manual

Original OEM Workshop Manual: 2004-2008 Audi A4/S4 Quattro
(Type A4, S4, B6, B7, 8E, 8H) – Repair Manual with Wiring Diagram

Comprehensive Repair Guide for 2004-2008 Audi A4/S4 Quattro

This is the OEM workshop manual with wiring diagram for the 2004-2008 Audi A4 and S4 Quattro, covering B6 and B7 platforms (Type 8E and 8H). Available in a simple PDF format, this manual offers the same level of information trusted by Audi dealer mechanics for diagnosing, servicing, and repairing your vehicle.

Key Features:

• Official Audi Content: Exact procedures authorized by the manufacturer.
• Detailed Wiring Diagrams: Comprehensive electrical schematics for precise troubleshooting.
• Easy-to-Use PDF Format: Fully indexed, searchable, and printable.
• Complete Coverage: All repair, maintenance, and service details in one document.

Why You Need This Manual:

• Authentic and Reliable: Get the same data trusted by Audi service centers worldwide.
• DIY and Professional Use: Perfect for car owners, enthusiasts, and professional mechanics.
• Cost-Effective Repairs: Save time and money by handling repairs yourself.
• Instant Access: Digital PDF format available for immediate download.
• No subscriptions or renewals — one-time download, yours forever.

This 2004-2008 Audi A4/S4 Quattro Repair Manual equips you with everything needed for accurate diagnostics, routine maintenance, and advanced repairs. Download now and take control of your car’s service and repair needs! 🚘🔧

Table of Contents : 2004-2008 Audi A4 S4 Quattro Repair Manual

1-GENERAL

• • GENERAL INFORMATION.
  • MAINTENANCE.
  • ENGINE 1.8L.

2-ENGINE

• • ENGINE 1.8L (AMB).
  • ENGINE 2.0L (BPG, BWT).
  • ENGINE 3.0L (AVK, BGN).
  • ENGINE 3.2L (BKH).
  • ENGINE 4.2L (BVJ).
  • FUEL SUPPLY SYSTEM (GENERAL).
  • ENGINE PERFORMANCE GENERAL.
  • ENGINE PERFORMANCE 1.8L.
  • ENGINE PERFORMANCE 2.0L.
  • ENGINE PERFORMANCE 3.0L.
  • ENGINE PERFORMANCE 3.2L.
  • 3.0L PETROL BBJ ENGINE.
  • 3.0L TURBO DIESEL ASB ENGINE.
  • 3.2L PETROL AUK ENGINE.
  • CLUTCH SYSTEM.

3-TRANSMISSION

• • CLUTCH SYSTEM.
  • AUTOMATIC TRANSMISSION 01V.
  • AUTOMATIC TRANSMISSION 09L.
  • AUTOMATIC TRANSMISSION CVT 01J.
  • MANUAL TRANSMISSION 0A3.
  • MANUAL TRANSMISSION 01A.
  • MANUAL TRANSMISSION 01E.
  • MANUAL TRANSMISSION 01X.
  • MANUAL TRANSMISSION 02X.
  • MANUAL TRANSMISSION 012-01W.

4-BRAKE

• • FINAL DRIVE AND DIFFERENTIAL (REAR).
  • BRAKES SYSTEM.
  • HVAC SYSTEM.

5- HEATING AIR CONDITIONING

• • HVAC SYSTEM

6-SUSPENSION

• • ACCESSORIES, EQUIPMENT, (OBD)
  • SUSPENSION, STEERING WHEELS

7-ACCESSORIES and EQUIPMENT

• • OBD.
  • ELECTRICAL SYSTEM (GENERAL).
  • BODY EXTERIOR.
  • BODY INTERIOR.
  • COMMUNICATION.
  • BODY COLLISION REPAIR.

8-ELECTRICAL  WIRING

• • ELECTRICAL SYSTEM (GENERAL).
  • ELECTRICAL COMPONENT LOCATOR.
  • BATTERY, STARTER, GENERATOR AND CRUISE CONTROL.
  • INSTRUMENTS.
  • WINDSHIELD WIPER WASHER SYSTEM.
  • LIGHTS, SWITCHES EXTERIOR.
  • LIGHTS, SWITCHES INTERIOR.
  • FUSES AND CIRCUIT BREAKERS CABRIO.
  • FUSES AND CIRCUIT BREAKERS SEDAN.
  • SYSTEM WIRING DIAGRAMS.
  • AUDI A4 WIRING DIAGRAMS.
  • CURRENT FLOW DIAGRAMS 3.0L ENGINE.
  • WIRING SUPPLEMENT.

Sample Pages

Reported Issues By Owners

The 2008 Audi A4 S4 Quattro is a high-performance luxury sedan or convertible featuring Audi’s Quattro all-wheel-drive system and a powerful V8 engine. While it offers strong performance and premium features, it is known for some common issues that potential buyers and owners should be aware of:

1. Timing Chain and Tensioner Issues

• Issue: The 4.2L V8 engine in the S4 is known for timing chain and tensioner problems. These components are located at the back of the engine, making repairs labor-intensive and expensive.
• Symptoms: Rattling noise at startup, engine misfires, or poor performance.
• Solution: If caught early, replacing the timing chain tensioners or guides may resolve the issue. Neglecting the problem can lead to engine damage.

2. Excessive Oil Consumption

• Issue: The V8 engine is prone to consuming oil excessively, especially in high-mileage vehicles.
• Symptoms: Low oil levels between oil changes, oil warning lights, or the need to top off frequently.
• Solution: Regularly monitor oil levels and use high-quality synthetic oil. If excessive consumption persists, it may require engine repairs, such as replacing valve seals or piston rings.

3. Carbon Build-Up

• Issue: Direct injection engines like the one in the S4 can experience carbon build-up on intake valves, leading to reduced performance and fuel efficiency.
• Symptoms: Rough idle, reduced power, or engine hesitation.
• Solution: Perform periodic intake valve cleaning using walnut blasting or chemical cleaners.

4. Cooling System Problems

• Issue: Components like the water pump, thermostat, and radiator are known to fail over time.
• Symptoms: Overheating, coolant leaks, or a rising temperature gauge.
• Solution: Replace faulty cooling system components and ensure regular coolant flushes to prevent system blockages.

5. Electrical Issues

• Issue: Electrical components, including window regulators, door locks, and dashboard displays, can malfunction.
• Symptoms: Non-functioning windows, flickering lights, or warning lights on the dash.
• Solution: Inspect the affected systems and replace faulty wiring, switches, or modules.

6. Suspension Wear

• Issue: The S4’s suspension components, such as control arms, bushings, and shocks, are prone to wear, especially in vehicles driven aggressively.
• Symptoms: Clunking noises, uneven tire wear, or a rough ride.
• Solution: Inspect the suspension regularly and replace worn components with high-quality OEM or aftermarket parts.

7. Quattro System Maintenance

• Issue: The Quattro all-wheel-drive system requires regular maintenance to remain reliable.
• Symptoms: Vibrations, clunking, or reduced traction.
• Solution: Change the differential and transmission fluids according to the manufacturer’s recommendations.

8. Clutch and Transmission Issues (Manual Models)

• Issue: The clutch can wear out prematurely, especially in vehicles driven aggressively. There are also reports of manual transmission synchro problems.
• Symptoms: Difficulty shifting gears, clutch slipping, or grinding noises.
• Solution: Replace the clutch and flywheel when worn. Transmission issues may require repairs or a rebuild.

9. Power Steering Leaks

• Issue: Power steering hoses and seals are prone to leaking.
• Symptoms: Low power steering fluid, whining noise when turning, or heavy steering.
• Solution: Replace leaking hoses or seals and refill with the correct fluid.

10. Headlight and Tail Light Problems

• Issue: HID headlights and LED tail lights may fail prematurely, often due to electrical issues or moisture intrusion.
• Symptoms: Flickering, dim lights, or warning messages on the dash.
• Solution: Replace faulty bulbs or ballasts and ensure headlight housings are properly sealed.

11. Brake Wear

• Issue: Brake pads and rotors tend to wear quickly, especially with spirited driving or heavy use.
• Symptoms: Squealing noises, reduced braking performance, or vibration when braking.
• Solution: Replace brake pads and rotors with high-quality components and inspect the braking system regularly.

12. Fuel Pump or Injector Problems

• Issue: The high-pressure fuel pump or injectors may fail, leading to fuel delivery issues.
• Symptoms: Rough running, difficulty starting, or poor performance.
• Solution: Replace the faulty pump or injectors and ensure fuel system maintenance is performed.

13. Interior Wear and Tear

• Issue: The interior materials, such as leather seats and trim, can wear out or peel over time.
• Symptoms: Cracked leather, faded trim, or broken interior components.
• Solution: Use high-quality leather conditioners and repair damaged areas as needed.

Summary

The 2008 Audi A4 S4 Quattro is a fun and capable performance car, but it requires diligent maintenance and attention to potential issues, especially with its V8 engine and Quattro system. If you’re considering purchasing a used model, ensure it has a thorough service history and have it inspected by a trusted mechanic. Regular maintenance and addressing problems promptly can help prolong the life of this high-performance luxury vehicle.