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 (2.8L & 3.2L - Generic Scan Tool, Engine Code(S): AFP, BDF, BJS [A4 Platform] (28 Ignition/Glow Plug System - St Generic Scan Tool)) Section 3 (2.8L - Engine Mechanical, Engine Code: BDF) Section 4 (2.8L - Fuel Injection Ignition. [BDF] - (24 - MULTIPORT Fuel Injection, 28 - Ignition/Glow Plug System)) Section 5 (5 SPD. Manual Transmission 02J (A4 Platform)) Section 6 (5 AND 6 SPD. MANUAL TRANSMISSION 02M (2002-05) (A4 Platform)) Section 7 (2.8L & 3.2L - Generic Scan Tool, Engine Code(S): AFP, BDF, BJS [A4 Platform] (20 Fuel Supply - 26 Exhaust System, Emission Controls)) Different car Section 1 (1.9L - Engine Mechanical - ALH (A4 Platform)) Section 2 (1.9L - Cooling System - ALH (A4 Platform)) Section 3 (1.9L - Turbocharger, G-Charger - ALH (A4 Platform)) Section 4 (1.9L - Exhaust System, Emission Controls - ALH (A4 Platform)) Section 5 (5 SPD. Manual Transmission 020 (A3 Platform)) Section 6 (5 SPD. Manual Transmission 02A (A3 Platform)) Section 7 (4 SPD. Automatic Transmission 01M (A3 Platform)) Section 8 (4 SPD. Automatic Transmission 01M On Board Diagnostic (A3 Platform)) Section 9 (4 SPD. Automatic Transmission 096 (A3 Platform)) Section 10 (Wheels, Tires, Wheel Alignment (A3 Platform)) Section 11 (Brakes - Hydraulic Components (A3 Platform)) Section 12 (Steering (A3 Platform)) Section 13 (Body - Front (A3 Platform)) Section 14 (Hood, Lids (A3 Platform)) Section 15 (Front Doors, Central Locking System (A3 Platform)) Section 16 (Bumpers (A3 Platform)) Section 17 (Glass, Window Regulators (A3 Platform)) Section 18 (Exterior Equipment (A3 Platform)) Section 19 (Interior Equipment (A3 Platform)) Section 20 (Passenger Protection - Airbags, Seat Belts (A3 Platform)) Section 21 (Interior Trim (A3 Platform)) Section 22 (Seats - Frames (A3 Platform)) Section 23 (Body - Front) Section 24 (Hood, Lids) Section 25 (Bumpers) Section 26 (Exterior Equipment) Section 27 (Interior Trim) Section 28 (Seats - Frames) Section 29 (SRS - Body On Board Diagnostic (OBD) (A3 Platform)) Section 30 (Heating & Air Conditioning (A3 Platform)) Section 31 (On Board Diagnostic (OBD) (A3 Platform)) Section 32 (Battery, Starter, Generator, Cruise Control (A3 Platform)) Section 33 (Instruments (A3 Platform)) Section 34 (Radio, Telephone, Navigation, Trip Computer (A3 Platform)) Section 35 (Windshield Wiper &Washer System (A3 Platform)) Section 36 (Lights, Switches - Exterior (A3 Platform)) Section 37 (Lights, Switches - Interior, Anti-Theft (A3 Platform)) Section 38 (Maintenance (A3 Platform)) Section 39 (1.9L TDI Engine Mechanical - AAZ, 1Z, AHU (A3 Platform)) Section 40 (Engine Cooling System - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 41 (Fuel Supply - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 42 (Turbocharger, G-Charger - 1.9L TDI - AAZ, 1Z, AHU (A3 Platform)) Section 43 (Exhaust System, Emission Controls - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 44 (2.0L Engine Mechanical - Aba (A3 Platform)) Section 45 (2.0L Engine Cooling System - Aba (A3 Platform)) Section 46 (2.0L Fuel Supply - Aba (A3 Platform)) Section 47 (2.0L Exhaust System, Emission Controls - Aba (A3 Platform)) Section 48 (2.8L VR6 2V Engine Mechanical - AAA (A3 Platform)) Section 49 (Engine Cooling System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 50 (Fuel Supply - 2.8 L VR6 2V - AAA (A3 Platform)) Section 51 (Exhaust System, Emission Controls - 2.8L VR6 2V - AAA (A3 Platform)) Section 52 (Diesel Fuel Injection - 1.9L, AAZ (ECO Diesel)) Section 53 (Ignition-Glow Plug System - 1.9L, AAZ (ECO Diesel) (A3 Platform)) Section 54 (On Board Diagnostic (OBD) - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 55 (Diesel Fuel Injection - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 56 (Ignition-Glow Plug System - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 57 (2.0L On Board Diagnostic (OBD) - Aba (A3 Platform)) Section 58 (2.0L MULTIPORT Fuel Injection (MFI) - Aba (A3 Platform)) Section 59 (2.0L Ignition/Glow Plug System - Aba (A3 Platform)) Section 60 (On Board Diagnostic (OBD) - 2.0L 4-CYL. 2V - Aba) Section 61 (MULTIPORT Fuel Injection (MFI) - 2.0L 4-CYL. 2V - Aba) Section 62 (Ignition-Glow Plug System - 2.0L 4-CYL. 2V - Aba) Section 63 (On Board Diagnostic (OBD) - 2.0L, Aba (A3 Platform)) Section 64 (MULTIPORT Fuel Injection (MFI) - 2.0L, Aba (A3 Platform)) Section 65 (Ignition-Glow Plug System - 2.0L, Aba (A3 Platform) (A3 Platform)) Section 66 (On Board Diagnostic (OBD) - 2.8L VR6, AAA) Section 67 (MULTIPORT Fuel Injection (MFI) - 2.8L VR6, AAA) Section 68 (Ignition-Glow Plug System - 2.8L VR6, AAA) Section 69 (On Board Diagnostic (OBD) - 2.8L VR6, AAA (A3 Platform)) Section 70 (MULTIPORT Fuel Injection (MFI) - 2.8 L VR6 2V - AAA (A3 Platform)) Section 71 (Ignition/Glow Plug System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 72 (Battery Troubleshooting (A3 Platform)) Section 73 (Generator Troubleshooting (A3 Platform)) Section 74 (Multi-Function Indicator Troubleshooting (A3 Platform)) Section 75 (Glow Plug System Troubleshooting - 1.9L - AAZ (CANADA Only)) Section 76 (On Board Diagnostic (OBD) - 1.8L, AWD (A4 Platform)) Section 77 (1.8L - MULTIPORT Fuel Injection (MFI) - AWD (A4 Platform)) Section 78 (1.8L - Ignition/Glow Plug System - AWD (A4 Platform)) Section 79 (On Board Diagnostic (OBD) - 1.9L ALH, 2V TDI) Section 80 (1.9L - Diesel Fuel Injection - ALH (A4 Platform)) Section 81 (1.9L - Ignition/Glow Plug System - ALH (A4 Platform)) Section 82 (On Board Diagnostic (OBD) - 1.9L ALH, 2V TDI) Section 83 (1.9L - Diesel Fuel Injection - ALH, 2V TDI (A4 Platform)) Section 84 (1.9L - Ignition/Glow Plug System - ALH, 2V TDI (A4 Platform)) Section 85 (1.9L - Fuel Supply - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 86 (1.9L - Turbocharger, G-Charger - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 87 (1.9L - Diesel Fuel Injection - TDI, ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 88 (1.9L - Exhaust System, Emission Controls - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 89 (1.9L - Ignition/Glow Plug System - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 90 (On Board Diagnostic (OBD), Generic Scan Tool - 1.9L TDI, ALH, BEW (A4 Platform)) Section 91 (2.0L - MULTIPORT Fuel Injection (MFI) - AEG, AVH, AZG) Section 92 (On Board Diagnostic (OBD), Generic Scan Tool - 2.0L AEG, AVH, AZG) Section 93 (Cabin Air Filter - A5G Platform) Section 94 (2.0L - Engine Mechanical - AEG, AVH, AZG, BBW, BEV (A4 Platform)) Section 95 (1.9L - TDI Engine Mechanical, Fuel Injection Glow Plug, Engine Code(S): BEW (A4 Platform)) Section 96 (3.2L VR6 4V Engine Mechanical, Fuel Injection Ignition, Engine Code(S): BJS) Section 97 (1.9L - TDI Engine Mechanical - ALH (A4 Platform)) Section 98 (2.8L - Engine Mechanical - AFP (A4 Platform)) Section 99 (1.8L - Fuel Injection & Ignition, Engine Code(S): AWD) Section 100 (1.9L - Fuel Injection Glow Plug, Engine Code: ALH (A4 Platform)) Section 101 (1.9L - Fuel Injection Glow Plug, Engine Code ALH, From My 2002 (A4 Platform)) Section 102 (1.9L - TDI And TDI Pd Generic Scan Tool, Engine Code(S): ALH, BEW (A4 Platform)) Section 103 (2.0L - Generic Scan Tool, Engine Code(S): AEG (A4 Platform)) Section 104 (2.8L - Fuel Injection Ignition, Engine Code(S): AFP (A4 Platform)) Section 105 (6 SPD. Manual Transmission 02Y All Wheel Drive) Section 106 (4 SPD. Automatic Transmission 01M On Board Diagnostic (OBD) (A4 Platform)) Section 107 (4 SPD. Aut
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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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