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 (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 2 (2.8L - Engine Mechanical, Engine Code: BDF) Section 3 (2.8L - Fuel Injection Ignition. [BDF] - (24 - MULTIPORT Fuel Injection, 28 - Ignition/Glow Plug System)) Section 4 (5 AND 6 SPD. MANUAL TRANSMISSION 02M (2002-05) (A4 Platform)) Section 5 (5 SPD. Automatic Transmission 09A On Board Diagnostic (OBD)) Section 6 (5 SPD. Automatic Transmission 09A) 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 (On Board Diagnostic (OBD) (From Late Production 1999) (A4 Platform)) Section 6 (5 SPD. Manual Transmission 020 (A3 Platform)) Section 7 (5 SPD. Manual Transmission 02A (A3 Platform)) Section 8 (4 SPD. Automatic Transmission 01M (A3 Platform)) Section 9 (4 SPD. Automatic Transmission 01M On Board Diagnostic (A3 Platform)) Section 10 (4 SPD. Automatic Transmission 096 (A3 Platform)) Section 11 (Wheels, Tires, Wheel Alignment (A3 Platform)) Section 12 (Brakes - Hydraulic Components (A3 Platform)) Section 13 (Steering (A3 Platform)) Section 14 (Body - Front (A3 Platform)) Section 15 (Hood, Lids (A3 Platform)) Section 16 (Front Doors, Central Locking System (A3 Platform)) Section 17 (Bumpers (A3 Platform)) Section 18 (Glass, Window Regulators (A3 Platform)) Section 19 (Exterior Equipment (A3 Platform)) Section 20 (Interior Equipment (A3 Platform)) Section 21 (Passenger Protection - Airbags, Seat Belts (A3 Platform)) Section 22 (Interior Trim (A3 Platform)) Section 23 (Seats - Frames (A3 Platform)) Section 24 (Body - Front) Section 25 (Hood, Lids) Section 26 (Bumpers) Section 27 (Exterior Equipment) Section 28 (Interior Trim) Section 29 (Seats - Frames) Section 30 (SRS - Body On Board Diagnostic (OBD) (A3 Platform)) Section 31 (Heating & Air Conditioning (A3 Platform)) Section 32 (On Board Diagnostic (OBD) (A3 Platform)) Section 33 (Battery, Starter, Generator, Cruise Control (A3 Platform)) Section 34 (Instruments (A3 Platform)) Section 35 (Radio, Telephone, Navigation, Trip Computer (A3 Platform)) Section 36 (Windshield Wiper &Washer System (A3 Platform)) Section 37 (Lights, Switches - Exterior (A3 Platform)) Section 38 (Lights, Switches - Interior, Anti-Theft (A3 Platform)) Section 39 (Maintenance (A3 Platform)) Section 40 (1.9L TDI Engine Mechanical - AAZ, 1Z, AHU (A3 Platform)) Section 41 (Engine Cooling System - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 42 (Fuel Supply - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 43 (Turbocharger, G-Charger - 1.9L TDI - AAZ, 1Z, AHU (A3 Platform)) Section 44 (Exhaust System, Emission Controls - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 45 (2.0L Engine Mechanical - Aba (A3 Platform)) Section 46 (2.0L Engine Cooling System - Aba (A3 Platform)) Section 47 (2.0L Fuel Supply - Aba (A3 Platform)) Section 48 (2.0L Exhaust System, Emission Controls - Aba (A3 Platform)) Section 49 (2.8L VR6 2V Engine Mechanical - AAA (A3 Platform)) Section 50 (Engine Cooling System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 51 (Fuel Supply - 2.8 L VR6 2V - AAA (A3 Platform)) Section 52 (Exhaust System, Emission Controls - 2.8L VR6 2V - AAA (A3 Platform)) Section 53 (Diesel Fuel Injection - 1.9L, AAZ (ECO Diesel)) Section 54 (Ignition-Glow Plug System - 1.9L, AAZ (ECO Diesel) (A3 Platform)) Section 55 (On Board Diagnostic (OBD) - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 56 (Diesel Fuel Injection - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 57 (Ignition-Glow Plug System - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 58 (2.0L On Board Diagnostic (OBD) - Aba (A3 Platform)) Section 59 (2.0L MULTIPORT Fuel Injection (MFI) - Aba (A3 Platform)) Section 60 (2.0L Ignition/Glow Plug System - Aba (A3 Platform)) Section 61 (On Board Diagnostic (OBD) - 2.0L 4-CYL. 2V - Aba) Section 62 (MULTIPORT Fuel Injection (MFI) - 2.0L 4-CYL. 2V - Aba) Section 63 (Ignition-Glow Plug System - 2.0L 4-CYL. 2V - Aba) Section 64 (On Board Diagnostic (OBD) - 2.0L, Aba (A3 Platform)) Section 65 (MULTIPORT Fuel Injection (MFI) - 2.0L, Aba (A3 Platform)) Section 66 (Ignition-Glow Plug System - 2.0L, Aba (A3 Platform) (A3 Platform)) Section 67 (On Board Diagnostic (OBD) - 2.8L VR6, AAA) Section 68 (MULTIPORT Fuel Injection (MFI) - 2.8L VR6, AAA) Section 69 (Ignition-Glow Plug System - 2.8L VR6, AAA) Section 70 (On Board Diagnostic (OBD) - 2.8L VR6, AAA (A3 Platform)) Section 71 (MULTIPORT Fuel Injection (MFI) - 2.8 L VR6 2V - AAA (A3 Platform)) Section 72 (Ignition/Glow Plug System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 73 (Battery Troubleshooting (A3 Platform)) Section 74 (Generator Troubleshooting (A3 Platform)) Section 75 (Multi-Function Indicator Troubleshooting (A3 Platform)) Section 76 (Glow Plug System Troubleshooting - 1.9L - AAZ (CANADA Only)) Section 77 (On Board Diagnostic (OBD) - 1.8L, AWD (A4 Platform)) Section 78 (1.8L - MULTIPORT Fuel Injection (MFI) - AWD (A4 Platform)) Section 79 (1.8L - Ignition/Glow Plug System - AWD (A4 Platform)) Section 80 (On Board Diagnostic (OBD) - 1.9L ALH, 2V TDI) Section 81 (1.9L - Diesel Fuel Injection - ALH (A4 Platform)) Section 82 (1.9L - Ignition/Glow Plug System - ALH (A4 Platform)) Section 83 (On Board Diagnostic (OBD) - 1.9L ALH, 2V TDI) Section 84 (1.9L - Diesel Fuel Injection - ALH, 2V TDI (A4 Platform)) Section 85 (1.9L - Ignition/Glow Plug System - ALH, 2V TDI (A4 Platform)) Section 86 (1.9L - Fuel Supply - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 87 (1.9L - Turbocharger, G-Charger - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 88 (1.9L - Diesel Fuel Injection - TDI, ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 89 (1.9L - Exhaust System, Emission Controls - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 90 (1.9L - Ignition/Glow Plug System - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 91 (On Board Diagnostic (OBD), Generic Scan Tool - 1.9L TDI, ALH, BEW (A4 Platform)) Section 92 (2.0L - MULTIPORT Fuel Injection (MFI) - AEG, AVH, AZG) Section 93 (On Board Diagnostic (OBD), Generic Scan Tool - 2.0L AEG, AVH, AZG) Section 94 (Cabin Air Filter - A5G Platform) Section 95 (2.0L - Engine Mechanical - AEG, AVH, AZG, BBW, BEV (A4 Platform)) Section 96 (1.9L - TDI Engine Mechanical, Fuel Injection Glow Plug, Engine Code(S): BEW (A4 Platform)) Section 97 (3.2L VR6 4V Engine Mechanical, Fuel Injection Ignition, Engine Code(S): BJS) Section 98 (1.9L - TDI Engine Mechanical - ALH (A4 Platform)) Section 99 (2.8L - Engine Mechanical - AFP (A4 Platform)) Section 100 (1.8L - Fuel Injection & Ignition, Engine Code(S): AWD) Section 101 (1.9L - Fuel Injection Glow Plug, Engine Code: ALH (A4 Platform)) Section 102 (1.9L - Fuel Injection Glow Plug, Engine Code ALH, From My 2002 (A4 Platform)) Section 103 (1.9L - TDI And TDI Pd Generic Scan Tool, Engine Code(S): ALH, BEW (A4 Platform)) Section 104 (2.0L - Generic Scan Tool, Engine Code(S): AEG (A4 Platform)) Section 105 (2.8L - Fuel Injection Ignition, Engine Code(S): AFP (A4 Platform)) Section 106 (6 SPD. Manual Transmission 02Y All Wheel Drive) Section 107 (
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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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