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 (1.9L - Engine Mechanical - ALH (A4 Platform)) Section 3 (1.9L - Cooling System - ALH (A4 Platform)) Section 4 (1.9L - Turbocharger, G-Charger - ALH (A4 Platform)) Section 5 (1.9L - Exhaust System, Emission Controls - ALH (A4 Platform)) Section 6 (1.9L - Ignition/Glow Plug System - ALH (A4 Platform)) Section 7 (1.9L - Diesel Fuel Injection - ALH, 2V TDI (A4 Platform)) Section 8 (1.9L - Ignition/Glow Plug System - ALH, 2V TDI (A4 Platform)) Section 9 (1.9L - Fuel Supply - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 10 (1.9L - Turbocharger, G-Charger - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 11 (1.9L - Diesel Fuel Injection - TDI, ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 12 (1.9L - Exhaust System, Emission Controls - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 13 (1.9L - Ignition/Glow Plug System - ALH, BEW (Generic Scan Tool) (A4 Platform)) Section 14 (On Board Diagnostic (OBD), Generic Scan Tool - 1.9L TDI, ALH, BEW (A4 Platform)) Section 15 (2.0L - MULTIPORT Fuel Injection (MFI) - AEG, AVH, AZG) Section 16 (On Board Diagnostic (OBD), Generic Scan Tool - 2.0L AEG, AVH, AZG) Section 17 (2.0L - Engine Mechanical - AEG, AVH, AZG, BBW, BEV (A4 Platform)) Section 18 (1.9L - TDI Engine Mechanical, Fuel Injection Glow Plug, Engine Code(S): BEW (A4 Platform)) Section 19 (1.9L - TDI Engine Mechanical - ALH (A4 Platform)) Section 20 (1.9L - Fuel Injection Glow Plug, Engine Code ALH, From My 2002 (A4 Platform)) Section 21 (1.9L - TDI And TDI Pd Generic Scan Tool, Engine Code(S): ALH, BEW (A4 Platform)) Section 22 (5 SPD. Manual Transmission 02J (A4 Platform)) Section 23 (4 SPD. Automatic Transmission 01M On Board Diagnostic (OBD) (A4 Platform)) Section 24 (5 SPD. Automatic Transmission 09A On Board Diagnostic (OBD)) Section 25 (4 SPD. Automatic Transmission 01M (A4 Platform)) Section 26 (5 SPD. Automatic Transmission 09A) Section 27 (Brake System - A4 Platform) Section 28 (Maintenance Intervals (Sedan) (A5 Platform)) Section 29 (Wiring (Sedan) (A5 Platform)) Section 30 (General, Technical Data - Heating, Ventilation & Air Conditioning (Sedan) (A5 Platform)) Section 31 (Maintenance, Diagnosis - Maintenance Procedures (As Of 08.2009) (Sedan) (A5 Platform)) Section 32 (Maintenance, Diagnosis - Maintenance Procedures (As Of 05.2011) (Sedan) (A5 Platform)) Section 33 (Air Conditioning (Sedan) (A5 Platform)) Section 34 (Heating, Ventilation (Sedan) (A5 Platform)) Section 35 (Clutches - 0A4 (Sedan) (A5 Platform)) Section 36 (Wheels, Tires, Wheel Alignment (Sedan) (A5 Platform)) Section 37 (Wheels, Tires, Wheel Alignment - General Information (Sedan) (A5 Platform)) Section 38 (1.9L - Technical Data - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) Section 39 (General, Technical Data - Engine - 2.5L - Engine Code(S): BGP, BGQ, CBTA & CBUA (As Of 12.2010) (Sedan) (A5 Platform)) Section 40 (General, Technical Data - Automatic Transmission 09G (Sedan) (A5 Platform)) Section 41 (General, Technical Data - Suspension, Wheels, Steering (Sedan) (A5 Platform)) Section 42 (General, Technical Data - Manual Transmission 0A4 (Sedan) (A5 Platform)) Section 43 (Controls, Housing - Automatic Transmission 09G (Sedan) (A5 Platform)) Section 44 (Battery, Starter, Generator, Cruise Control (Sedan) (A5 Platform)) Section 45 (Hydraulic Brake Components (Sedan) (A5 Platform)) Section 46 (2.5L - MULTIPORT Fuel Injection - Engine Code(S): BGP, BGQ, CBTA & CBUA (Sedan) (A5 Platform)) Section 47 (Controls, Housing - Manual Transmission 0A4 (Sedan) (A5 Platform)) Section 48 (1.9L - Fuel Injection System - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) Section 49 (Wiper/Washer Systems - General Information (Sedan) (A5 Platform)) Section 50 (Wiper/Washer Systems (Sedan) (A5 Platform)) Section 51 (Body Front (Sedan) (A5 Platform)) Section 52 (1.9L - Cylinder Head, VALVETRAIN - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) Section 53 (2.5L - Cylinder Head, VALVETRAIN - Engine Code(S): BGP, BGQ, CBTA & CBUA (Sedan) (A5 Platform)) Section 54 (2.5L - Ignition/Glow Plug System - Engine Code(S): BGP, BGQ, CBTA & CBUA (Sedan) (A5 Platform)) Section 55 (1.9L - Glow Plug System - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) Section 56 (Electrical System - (Battery, Starter, Generator, Cruise Control - General Information) (Sedan) (A5 Platform)) Section 57 (Mechanical Components - Brake System (Sedan) (A5 Platform)) Section 58 (2.5L - Exhaust System, Emission Controls - Engine Code(S): BGP, BGQ, CBTA & CBUA (Sedan) (A5 Platform)) Section 59 (1.9L - Exhaust System, Emission Controls - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) Section 60 (Interior Equipment (Sedan) (A5 Platform)) Section 61 (1.9L - Turbocharger, G-Charger - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) Section 62 (Seat Frames (Sedan) (A5 Platform)) Section 63 (Exterior Equipment (Sedan) (A5 Platform)) Section 64 (2.5L - Fuel Supply - Engine Code(S): BGP, BGQ, CBTA & CBUA (Sedan) (A5 Platform)) Section 65 (Gears, Hydraulic Controls - Automatic Transmission 09G (Sedan) (A5 Platform)) Section 66 (2.5L - Cooling System - Engine Code(S): BGP, BGQ, CBTA & CBUA (Sedan) (A5 Platform)) Section 67 (2.5L - Crankshaft, Cylinder Block - Engine Code(S): BGP, BGQ, CBTA & CBUA (Sedan) (A5 Platform)) Section 68 (Glass, Window Regulators (Sedan) (A5 Platform)) Section 69 (Front Suspension (Sedan) (A5 Platform)) Section 70 (Wiring - General Information (Sedan) (A5 Platform)) Section 71 (Exterior Lights, Switches (Sedan) (A5 Platform)) Section 72 (Exterior Body Panels (Hood, Lids) (Sedan) (A5 Platform)) Section 73 (Bumpers (Sedan) (A5 Platform)) Section 74 (1.9L - Crankshaft, Cylinder Block - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) Section 75 (1.9L - Engine, Removing And Installing - BKC, BLS, BRM & BXE (A5 Platform)) Section 76 (1.9L - Cooling System - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) Section 77 (1.9L - Engine Lubrication - Engine Code(S): BKC, BLS, BRM & BXE (A5 Platform)) Section 78 (1.9L - Fuel Supply System - BKC, BLS, BRM & BXE (A5 Platform)) Section 79 (Gears, Shafts - Manual Transmission 0A4 (Sedan) (A5 Platform)) Section 80 (Final Drive, Differential - Manual Transmission 0A4 (Sedan) (A5 Platform)) Section 81 (2.5L - Engine Assembly - Engine Code(S): BGP, BGQ, CBTA & CBUA (Sedan) (A5 Platform)) Section 82 (Interior Trim (Sedan) (A5 Platform)) Section 83 (Communication (Sedan) (A5 Platform)) Section 84 (Instruments (Sedan) (A5 Platform)) Section 85 (Passenger Protection, Airbags, Seat Belts (Sedan) (A5 Platform)) Section 86 (Steering (Sedan) (A5 Platform)) Section 87 (Interior Lights, Switches (Sedan) (A5 Platform)) Section 88 (Seat Upholstery, Covers (Sedan) (A5 Platform)) Section 89 (Front Doors, Central Locking System (Sedan) (A5 Platform)) Section 90 (Rear Doors (Sedan) (A5 Platform)) Section 91 (Antilock Brake System (Sedan) (A5 Platform)) Section 92 (Rear Suspension (Sedan) (A5 Platform)) Section 93 (2.5L - Lubrication - Engine Code(S): BGP, BGQ, CBTA & CBUA (Sedan) (A5 Platform)) Different car Section 1 (5 SPD. Manual Transmission 020 (A3 Platform)) Section 2 (5 SPD. Manual Transmission 02A (A3 Platform)) Section 3 (4 SPD. Automatic Transmission 01M (A3 Platform)) Section 4 (4 SPD. Automatic Transmission 01M On Board Diagnostic (A3 Platform)) Section 5 (4 SPD. Automatic Transmission 096 (A3 Platform)) Section 6 (Wheels, Tires, Wheel Alignment (A3 P
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
