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's manual. Be very cautious using repair info from here because these pages may not apply to your vehicle. Different variant/trim Section 1 (5 SPD. Manual Transmission 020 (A3 Platform)) Different car Section 1 (Fuses & Circuit Breakers - From Late Production 1999) Section 2 (5 SPD. Manual Transmission 02A (A3 Platform)) Section 3 (4 SPD. Automatic Transmission 096 (A3 Platform)) Section 4 (Rear Suspension (A3 Platform)) Section 5 (Body - Front (A3 Platform)) Section 6 (Hood, Lids (A3 Platform)) Section 7 (Front Doors, Central Locking System (A3 Platform)) Section 8 (Bumpers (A3 Platform)) Section 9 (Glass, Window Regulators (A3 Platform)) Section 10 (Exterior Equipment (A3 Platform)) Section 11 (Interior Equipment (A3 Platform)) Section 12 (Passenger Protection - Airbags, Seat Belts (A3 Platform)) Section 13 (Interior Trim (A3 Platform)) Section 14 (Seats - Frames (A3 Platform)) Section 15 (SRS - Body On Board Diagnostic (OBD) (A3 Platform)) Section 16 (1.9L TDI Engine Mechanical - AAZ, 1Z, AHU (A3 Platform)) Section 17 (Engine Cooling System - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 18 (Fuel Supply - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 19 (Turbocharger, G-Charger - 1.9L TDI - AAZ, 1Z, AHU (A3 Platform)) Section 20 (Exhaust System, Emission Controls - 1.9L 4-CYL. 2V TDI - AAZ, 1Z, AHU (A3 Platform)) Section 21 (2.8L VR6 2V Engine Mechanical - AAA (A3 Platform)) Section 22 (Engine Cooling System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 23 (Fuel Supply - 2.8 L VR6 2V - AAA (A3 Platform)) Section 24 (Exhaust System, Emission Controls - 2.8L VR6 2V - AAA (A3 Platform)) Section 25 (Diesel Fuel Injection - 1.9L, AAZ (ECO Diesel)) Section 26 (Ignition-Glow Plug System - 1.9L, AAZ (ECO Diesel) (A3 Platform)) Section 27 (On Board Diagnostic (OBD) - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 28 (Diesel Fuel Injection - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 29 (Ignition-Glow Plug System - 1.9L TDI, 1Z & AHU (A3 Platform)) Section 30 (On Board Diagnostic (OBD) - 2.0L 4-CYL. 2V - Aba) Section 31 (MULTIPORT Fuel Injection (MFI) - 2.0L 4-CYL. 2V - Aba) Section 32 (Ignition-Glow Plug System - 2.0L 4-CYL. 2V - Aba) Section 33 (On Board Diagnostic (OBD) - 2.0L, Aba (A3 Platform)) Section 34 (MULTIPORT Fuel Injection (MFI) - 2.0L, Aba (A3 Platform)) Section 35 (Ignition-Glow Plug System - 2.0L, Aba (A3 Platform) (A3 Platform)) Section 36 (On Board Diagnostic (OBD) - 2.8L VR6, AAA) Section 37 (MULTIPORT Fuel Injection (MFI) - 2.8L VR6, AAA) Section 38 (Ignition-Glow Plug System - 2.8L VR6, AAA) Section 39 (On Board Diagnostic (OBD) - 2.8L VR6, AAA (A3 Platform)) Section 40 (MULTIPORT Fuel Injection (MFI) - 2.8 L VR6 2V - AAA (A3 Platform)) Section 41 (Ignition/Glow Plug System - 2.8 L VR6 2V - AAA (A3 Platform)) Section 42 (Glow Plug System Troubleshooting - 1.9L - AAZ (CANADA Only)) Section 43 (2.0L - MULTIPORT Fuel Injection (MFI) - AEG, AVH, AZG) Section 44 (On Board Diagnostic (OBD), Generic Scan Tool - 2.0L AEG, AVH, AZG) Section 45 (2.0L - Engine Mechanical - AEG, AVH, AZG, BBW, BEV (A4 Platform)) Section 46 (1.9L - TDI Engine Mechanical, Fuel Injection Glow Plug, Engine Code(S): BEW (A4 Platform)) Section 47 (3.2L VR6 4V Engine Mechanical, Fuel Injection Ignition, Engine Code(S): BJS) Section 48 (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 49 (1.9L - TDI Engine Mechanical - ALH (A4 Platform)) Section 50 (1.8L - Engine Mechanical, Engine Code(S): AWD, AWW, AWP (A4 Platform)) Section 51 (2.8L - Engine Mechanical - AFP (A4 Platform)) Section 52 (2.8L - Engine Mechanical, Engine Code: BDF) Section 53 (1.8L - Fuel Injection & Ignition, Engine Code(S): AWD) Section 54 (1.8L - Fuel Injection Ignition, Engine Code(S): AWW, AWP (A4 Platform)) Section 55 (1.8L - Generic Scan Tool, Engine Code(S): AWP, AWW, AWD (A4 Platform)) Section 56 (1.9L - Fuel Injection Glow Plug, Engine Code: ALH (A4 Platform)) Section 57 (1.9L - Fuel Injection Glow Plug, Engine Code ALH, From My 2002 (A4 Platform)) Section 58 (1.9L - TDI And TDI Pd Generic Scan Tool, Engine Code(S): ALH, BEW (A4 Platform)) Section 59 (2.0L - Generic Scan Tool, Engine Code(S): AEG (A4 Platform)) Section 60 (2.8L - Fuel Injection Ignition, Engine Code(S): AFP (A4 Platform)) Section 61 (2.8L - Fuel Injection Ignition. [BDF] - (24 - MULTIPORT Fuel Injection, 28 - Ignition/Glow Plug System)) Section 62 (5 SPD. Manual Transmission 02J (A4 Platform)) Section 63 (5 AND 6 SPD. MANUAL TRANSMISSION 02M (2002-05) (A4 Platform)) Section 64 (6 SPD. Manual Transmission 02Y All Wheel Drive) Section 65 (4 SPD. Automatic Transmission 01M On Board Diagnostic (OBD) (A4 Platform)) Section 66 (5 SPD. Automatic Transmission 09A On Board Diagnostic (OBD)) Section 67 (4 SPD. Automatic Transmission 01M (A4 Platform)) Section 68 (5 SPD. Automatic Transmission 09A) Section 69 (Brake System - OBD (A4 Platform)) Section 70 (Brake System - A4 Platform) Section 71 (Suspension, Wheels, Steering (A4 Platform)) Section 72 (Body Exterior (A4 Platform)) Section 73 (Body Interior (A4 Platform)) Section 74 (Body On Board Diagnostic (OBD) (A4 Platform) [On Board Diagnostic (OBD) - Driver's Side Seat Adjustment, On Board Diagnostic (OBD)]) Section 75 (Heating, Ventilation Air Conditioning (A4 Platform)) Section 76 (Electrical Equipment On Board Diagnostic (OBD) (A4 Platform)) Section 77 (Electrical Equipment (A4 Platform)) Section 78 (Electrical Equipment - General Information (A4 Platform)) Section 79 (Radio, Telephone, Navigation (A4 Platform)) Section 80 (Maintenance (A4 Platform)) Section 81 (2.8L & 3.2L - Generic Scan Tool, Engine Code(S): AFP, BDF, BJS [A4 Platform] (20 Fuel Supply - 26 Exhaust System, Emission Controls)) Section 82 (Body On Board Diagnostic (OBD) (A4 Platform) [Convenience System (Vehicles With Power Windows), On Board Diagnostic (OBD)]) Section 83 (2.8L - Fuel Injection Ignition [BDF] - [01-On Board Diagnostic])