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 (On Board Diagnostic (OBD) - 1.8L, AWD (A4 Platform)) Section 9 (1.8L - MULTIPORT Fuel Injection (MFI) - AWD (A4 Platform)) Section 10 (1.8L - Ignition/Glow Plug System - AWD (A4 Platform)) Section 11 (1.8L - On Board Diagnostic (OBD) - AWW, AWP (A4 Platform)) Section 12 (1.8L - MULTIPORT Fuel Injection (MFI) - AWW, AWP (A4 Platform)) Section 13 (1.8L - Ignition/Glow Plug System - AWW, AWP (A4 Platform)) Section 14 (1.8L - Fuel Supply - AWD, AWP, AWW (A4 Platform)) Section 15 (1.8L - Turbocharger, G-Charger - AWD, AWP, AWW Generic (A4 Platform)) Section 16 (1.8L - MULTIPORT Fuel Injection (MFI) - AWD, AWP, AWW Generic (A4 Platform)) Section 17 (1.8L - Exhaust System, Emission Controls - AWD, AWP, AWW Generic (A4 Platform)) Section 18 (1.8L - Ignition/Glow Plug System - AWD, AWP, AWW Generic (A4 Platform)) Section 19 (1.8L - On Board Diagnostic (OBD), Generic Scan Tool - AWD, AWP, AWW) Section 20 (On Board Diagnostic (OBD) - 1.9L ALH, 2V TDI) Section 21 (1.9L - Diesel Fuel Injection - ALH (A4 Platform)) Section 22 (1.9L - Ignition/Glow Plug System - ALH (A4 Platform)) Section 23 (1.9L - Ignition/Glow Plug System - ALH, 2V TDI (A4 Platform)) Section 24 (1.9L - Fuel Supply - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 25 (1.9L - Turbocharger, G-Charger - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 26 (1.9L - Diesel Fuel Injection - TDI, ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 27 (1.9L - Exhaust System, Emission Controls - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 28 (1.9L - Ignition/Glow Plug System - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 29 (On Board Diagnostic (OBD), Generic Scan Tool - 1.9L TDI, ALH, BEW (A4 Platform)) Section 30 (2.0L - MULTIPORT Fuel Injection (MFI) - AEG, AVH, AZG) Section 31 (On Board Diagnostic (OBD), Generic Scan Tool - 2.0L AEG, AVH, AZG) Section 32 (2.0L - Engine Mechanical - AEG, AVH, AZG, BBW, BEV (A4 Platform)) Section 33 (1.9L - TDI Engine Mechanical - ALH (A4 Platform)) Section 34 (1.8L - Engine Mechanical, Engine Code(S): AWD, AWW, AWP (A4 Platform)) Section 35 (1.8L - Fuel Injection & Ignition, Engine Code(S): AWD) Section 36 (1.8L - Fuel Injection Ignition, Engine Code(S): AWW, AWP (A4 Platform)) Section 37 (1.8L - Generic Scan Tool, Engine Code(S): AWP, AWW, AWD (A4 Platform)) Section 38 (1.9L - Fuel Injection Glow Plug, Engine Code: ALH (A4 Platform)) Section 39 (1.9L - TDI And TDI Pd Generic Scan Tool, Engine Code(S): ALH, BEW (A4 Platform)) Section 40 (2.0L - Generic Scan Tool, Engine Code(S): AEG (A4 Platform)) Section 41 (5 SPD. Manual Transmission 02J (A4 Platform)) Different car Section 1 (2.8L VR6-Cylinder (Engine Code BDF) (A4 Platform)) Section 2 (5 SPD. Manual Transmission 020 (A3 Platform)) Section 3 (5 SPD. Manual Transmission 02A (A3 Platform)) Section 4 (4 SPD. Automatic Transmission 01M (A3 Platform)) Section 5 (4 SPD. Automatic Transmission 01M On Board Diagnostic (A3 Platform)) Section 6 (4 SPD. Automatic Transmission 096 (A3 Platform)) Section 7 (Wheels, Tires, Wheel Alignment (A3 Platform)) Section 8 (Brakes - Hydraulic Components (A3 Platform)) Section 9 (Steering (A3 Platform)) Section 10 (Body - Front (A3 Platform)) Section 11 (Hood, Lids (A3 Platform)) Section 12 (Front Doors, Central Locking System (A3 Platform)) Section 13 (Bumpers (A3 Platform)) Section 14 (Glass, Window Regulators (A3 Platform)) Section 15 (Exterior Equipment (A3 Platform)) Section 16 (Interior Equipment (A3 Platform)) Section 17 (Passenger Protection - Airbags, Seat Belts (A3 Platform)) Section 18 (Interior Trim (A3 Platform)) Section 19 (Seats - Frames (A3 Platform)) Section 20 (Body - Front) Section 21 (Hood, Lids) Section 22 (Bumpers) Section 23 (Exterior Equipment) Section 24 (Interior Trim) Section 25 (Seats - Frames) Section 26 (SRS - Body On Board Diagnostic (OBD) (A3 Platform)) Section 27 (Heating & Air Conditioning (A3 Platform)) Section 28 (On Board Diagnostic (OBD) (A3 Platform)) Section 29 (Battery, Starter, Generator, Cruise Control (A3 Platform)) Section 30 (Instruments (A3 Platform)) Section 31 (Radio, Telephone, Navigation, Trip Computer (A3 Platform)) Section 32 (Windshield Wiper &Washer System (A3 Platform)) Section 33 (Lights, Switches - Exterior (A3 Platform)) Section 34 (Lights, Switches - Interior, Anti-Theft (A3 Platform)) Section 35 (Maintenance (A3 Platform)) Section 36 (1.9L TDI Engine Mechanical - AAZ, 1Z, AHU (A3 Platform)) Section 37 (Engine Cooling System - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 38 (Fuel Supply - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 39 (Turbocharger, G-Charger - 1.9L TDI - AAZ, 1Z, AHU (A3 Platform)) Section 40 (Exhaust System, Emission Controls - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 41 (2.0L Engine Mechanical - Aba (A3 Platform)) Section 42 (2.0L Engine Cooling System - Aba (A3 Platform)) Section 43 (2.0L Fuel Supply - Aba (A3 Platform)) Section 44 (2.0L Exhaust System, Emission Controls - Aba (A3 Platform)) Section 45 (2.8L VR6 2V Engine Mechanical - AAA (A3 Platform)) Section 46 (Engine Cooling System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 47 (Fuel Supply - 2.8 L VR6 2V - AAA (A3 Platform)) Section 48 (Exhaust System, Emission Controls - 2.8L VR6 2V - AAA (A3 Platform)) Section 49 (Diesel Fuel Injection - 1.9L, AAZ (ECO Diesel)) Section 50 (Ignition-Glow Plug System - 1.9L, AAZ (ECO Diesel) (A3 Platform)) Section 51 (On Board Diagnostic (OBD) - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 52 (Diesel Fuel Injection - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 53 (Ignition-Glow Plug System - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 54 (2.0L On Board Diagnostic (OBD) - Aba (A3 Platform)) Section 55 (2.0L MULTIPORT Fuel Injection (MFI) - Aba (A3 Platform)) Section 56 (2.0L Ignition/Glow Plug System - Aba (A3 Platform)) Section 57 (On Board Diagnostic (OBD) - 2.0L 4-CYL. 2V - Aba) Section 58 (MULTIPORT Fuel Injection (MFI) - 2.0L 4-CYL. 2V - Aba) Section 59 (Ignition-Glow Plug System - 2.0L 4-CYL. 2V - Aba) Section 60 (On Board Diagnostic (OBD) - 2.0L, Aba (A3 Platform)) Section 61 (MULTIPORT Fuel Injection (MFI) - 2.0L, Aba (A3 Platform)) Section 62 (Ignition-Glow Plug System - 2.0L, Aba (A3 Platform) (A3 Platform)) Section 63 (On Board Diagnostic (OBD) - 2.8L VR6, AAA) Section 64 (MULTIPORT Fuel Injection (MFI) - 2.8L VR6, AAA) Section 65 (Ignition-Glow Plug System - 2.8L VR6, AAA) Section 66 (On Board Diagnostic (OBD) - 2.8L VR6, AAA (A3 Platform)) Section 67 (MULTIPORT Fuel Injection (MFI) - 2.8 L VR6 2V - AAA (A3 Platform)) Section 68 (Ignition/Glow Plug System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 69 (Battery Troubleshooting (A3 Platform)) Section 70 (Generator Troubleshooting (A3 Platform)) Section 71 (Multi-Function Indicator Troubleshooting (A3 Platform)) Section 72 (Glow Plug System Troubleshooting - 1.9L - AAZ (CANADA Only)) Section 73 (On Board Diagnostic (OBD) - 1.9L ALH, 2V TDI) Section 74 (1.9L - Diesel Fuel Injection - ALH, 2V TDI (A4 Platform)
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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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