Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
External Pages
's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle. Different variant/trim Section 1 (CLUTCHES - 02J (A4 PlLATFORM)) Section 2 (1.8L - Engine Mechanical - 4-CYL. 5V Turbo - AWD, AWW, AWP (A4 Platform)) Section 3 (1.8L - Cooling System - AWD, AWW, AWP (A4 Platform)) Section 4 (1.9L - Engine Mechanical - ALH (A4 Platform)) Section 5 (1.9L - Cooling System - ALH (A4 Platform)) Section 6 (1.9L - Turbocharger, G-Charger - ALH (A4 Platform)) Section 7 (1.9L - Exhaust System, Emission Controls - ALH (A4 Platform)) Section 8 (1.8L - On Board Diagnostic (OBD) - AWW, AWP (A4 Platform)) Section 9 (1.8L - MULTIPORT Fuel Injection (MFI) - AWW, AWP (A4 Platform)) Section 10 (1.8L - Ignition/Glow Plug System - AWW, AWP (A4 Platform)) Section 11 (1.8L - Fuel Supply - AWD, AWP, AWW (A4 Platform)) Section 12 (1.8L - Turbocharger, G-Charger - AWD, AWP, AWW Generic (A4 Platform)) Section 13 (1.8L - MULTIPORT Fuel Injection (MFI) - AWD, AWP, AWW Generic (A4 Platform)) Section 14 (1.8L - Exhaust System, Emission Controls - AWD, AWP, AWW Generic (A4 Platform)) Section 15 (1.8L - Ignition/Glow Plug System - AWD, AWP, AWW Generic (A4 Platform)) Section 16 (1.8L - On Board Diagnostic (OBD), Generic Scan Tool - AWD, AWP, AWW) Section 17 (1.9L - Ignition/Glow Plug System - ALH (A4 Platform)) Section 18 (On Board Diagnostic (OBD) - 1.9L ALH, 2V TDI) Section 19 (1.9L - Diesel Fuel Injection - ALH, 2V TDI (A4 Platform)) Section 20 (1.9L - Ignition/Glow Plug System - ALH, 2V TDI (A4 Platform)) Section 21 (1.9L - Fuel Supply - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 22 (1.9L - Turbocharger, G-Charger - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 23 (1.9L - Diesel Fuel Injection - TDI, ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 24 (1.9L - Exhaust System, Emission Controls - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 25 (1.9L - Ignition/Glow Plug System - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 26 (On Board Diagnostic (OBD), Generic Scan Tool - 1.9L TDI, ALH, BEW (A4 Platform)) Section 27 (2.0L - MULTIPORT Fuel Injection (MFI) - AEG, AVH, AZG) Section 28 (On Board Diagnostic (OBD), Generic Scan Tool - 2.0L AEG, AVH, AZG) Section 29 (2.0L - Engine Mechanical - AEG, AVH, AZG, BBW, BEV (A4 Platform)) Section 30 (1.9L - TDI Engine Mechanical - ALH (A4 Platform)) Section 31 (1.8L - Engine Mechanical, Engine Code(S): AWD, AWW, AWP (A4 Platform)) Section 32 (1.8L - Fuel Injection Ignition, Engine Code(S): AWW, AWP (A4 Platform)) Section 33 (1.8L - Generic Scan Tool, Engine Code(S): AWP, AWW, AWD (A4 Platform)) Section 34 (1.9L - Fuel Injection Glow Plug, Engine Code ALH, From My 2002 (A4 Platform)) Section 35 (1.9L - TDI And TDI Pd Generic Scan Tool, Engine Code(S): ALH, BEW (A4 Platform)) Section 36 (5 SPD. Manual Transmission 02J (A4 Platform)) Section 37 (5 AND 6 SPD. MANUAL TRANSMISSION 02M (2002-05) (A4 Platform)) Section 38 (4 SPD. Automatic Transmission 01M On Board Diagnostic (OBD) (A4 Platform)) Section 39 (4 SPD. Automatic Transmission 01M (A4 Platform)) Section 40 (Brake System - A4 Platform) Different car Section 1 (Specifications & Drive Belt Routing (1.9L BEW)) Section 2 (1.9L - Engine Mechanical - BEW (A4 Platform)) Section 3 (System Wiring Diagrams) Section 4 (5 SPD. Manual Transmission 020 (A3 Platform)) Section 5 (5 SPD. Manual Transmission 02A (A3 Platform)) Section 6 (4 SPD. Automatic Transmission 01M (A3 Platform)) Section 7 (4 SPD. Automatic Transmission 01M On Board Diagnostic (A3 Platform)) Section 8 (4 SPD. Automatic Transmission 096 (A3 Platform)) Section 9 (Wheels, Tires, Wheel Alignment (A3 Platform)) Section 10 (Brakes - Hydraulic Components (A3 Platform)) Section 11 (Steering (A3 Platform)) Section 12 (Body - Front (A3 Platform)) Section 13 (Hood, Lids (A3 Platform)) Section 14 (Front Doors, Central Locking System (A3 Platform)) Section 15 (Bumpers (A3 Platform)) Section 16 (Glass, Window Regulators (A3 Platform)) Section 17 (Exterior Equipment (A3 Platform)) Section 18 (Interior Equipment (A3 Platform)) Section 19 (Passenger Protection - Airbags, Seat Belts (A3 Platform)) Section 20 (Interior Trim (A3 Platform)) Section 21 (Seats - Frames (A3 Platform)) Section 22 (Body - Front) Section 23 (Hood, Lids) Section 24 (Bumpers) Section 25 (Exterior Equipment) Section 26 (Interior Trim) Section 27 (Seats - Frames) Section 28 (SRS - Body On Board Diagnostic (OBD) (A3 Platform)) Section 29 (Heating & Air Conditioning (A3 Platform)) Section 30 (On Board Diagnostic (OBD) (A3 Platform)) Section 31 (Battery, Starter, Generator, Cruise Control (A3 Platform)) Section 32 (Instruments (A3 Platform)) Section 33 (Radio, Telephone, Navigation, Trip Computer (A3 Platform)) Section 34 (Windshield Wiper &Washer System (A3 Platform)) Section 35 (Lights, Switches - Exterior (A3 Platform)) Section 36 (Lights, Switches - Interior, Anti-Theft (A3 Platform)) Section 37 (Maintenance (A3 Platform)) Section 38 (1.9L TDI Engine Mechanical - AAZ, 1Z, AHU (A3 Platform)) Section 39 (Engine Cooling System - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 40 (Fuel Supply - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 41 (Turbocharger, G-Charger - 1.9L TDI - AAZ, 1Z, AHU (A3 Platform)) Section 42 (Exhaust System, Emission Controls - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 43 (2.0L Engine Mechanical - Aba (A3 Platform)) Section 44 (2.0L Engine Cooling System - Aba (A3 Platform)) Section 45 (2.0L Fuel Supply - Aba (A3 Platform)) Section 46 (2.0L Exhaust System, Emission Controls - Aba (A3 Platform)) Section 47 (2.8L VR6 2V Engine Mechanical - AAA (A3 Platform)) Section 48 (Engine Cooling System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 49 (Fuel Supply - 2.8 L VR6 2V - AAA (A3 Platform)) Section 50 (Exhaust System, Emission Controls - 2.8L VR6 2V - AAA (A3 Platform)) Section 51 (Diesel Fuel Injection - 1.9L, AAZ (ECO Diesel)) Section 52 (Ignition-Glow Plug System - 1.9L, AAZ (ECO Diesel) (A3 Platform)) Section 53 (On Board Diagnostic (OBD) - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 54 (Diesel Fuel Injection - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 55 (Ignition-Glow Plug System - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 56 (2.0L On Board Diagnostic (OBD) - Aba (A3 Platform)) Section 57 (2.0L MULTIPORT Fuel Injection (MFI) - Aba (A3 Platform)) Section 58 (2.0L Ignition/Glow Plug System - Aba (A3 Platform)) Section 59 (On Board Diagnostic (OBD) - 2.0L 4-CYL. 2V - Aba) Section 60 (MULTIPORT Fuel Injection (MFI) - 2.0L 4-CYL. 2V - Aba) Section 61 (Ignition-Glow Plug System - 2.0L 4-CYL. 2V - Aba) Section 62 (On Board Diagnostic (OBD) - 2.0L, Aba (A3 Platform)) Section 63 (MULTIPORT Fuel Injection (MFI) - 2.0L, Aba (A3 Platform)) Section 64 (Ignition-Glow Plug System - 2.0L, Aba (A3 Platform) (A3 Platform)) Section 65 (On Board Diagnostic (OBD) - 2.8L VR6, AAA) Section 66 (MULTIPORT Fuel Injection (MFI) - 2.8L VR6, AAA) Section 67 (Ignition-Glow Plug System - 2.8L VR6, AAA) Section 68 (On Board Diagnostic (OBD) - 2.8L VR6, AAA (A3 Platform)) Section 69 (MULTIPORT Fuel Injection (MFI) - 2.8 L VR6 2V - AAA (A3 Platform)) Section 70 (Ignition/Glow Plug System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 71 (Battery Troubleshooting (A3 Platform)) Section 72 (Generator Troubleshooting (A3 Platform)) Section 73 (Multi-Function Indicator Troubleshooting (A3 Platform)) Section 74 (Glow Plug System Troubleshooting - 1.9L - AAZ (CANADA Only)) Section 75 (2.8L - Cooling System - AFP (A4 Platform)) Section 76 (On Board Diagnostic (OBD) - 1.8L, AWD (A4 Platform)) Section 77 (1.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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