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Manual Coverage
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Systems Covered
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Engine Overview:
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Detailed repair and diagnostic procedures for all gasoline and diesel engines offered in the B5 A4 generation.
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Engine Specifics:
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Covers 1.8L Turbo (AEB, APB, ATW, AWM), 2.8L V6 (AFC, AHA, ATQ) engines, including timing belt service, cylinder head overhauls, and component replacement.
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Transmission Systems:
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Comprehensive coverage for manual (01A, 02X) and automatic (01N, 01M, 01V) transmissions.
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Drivetrain And Axles:
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Detailed procedures for front-wheel drive (FWD) and quattro all-wheel drive (AWD) systems, including CV joints, driveshafts, differential service, and hub bearing replacement.
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Suspension And Steering:
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Front and rear suspension component repair (control arms, ball joints, bushings), steering rack and pump service, alignment specifications.
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Braking System:
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ABS system diagnostics and repair, brake caliper service, rotor replacement, fluid bleeding procedures, parking brake adjustments.
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Electrical System:
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Wiring diagrams, component testing, starter, alternator, battery service, fuse and relay locations, body control module (BCM) functions.
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HVAC System:
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Air conditioning system service, climate control unit diagnostics, heater core replacement, blower motor service.
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Fuel System:
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Fuel pump replacement, fuel injector cleaning and replacement, fuel pressure testing, EVAP system diagnostics.
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Cooling System:
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Radiator, water pump, thermostat replacement, coolant type specifications, leak testing.
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Exhaust System:
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Catalytic converter replacement, muffler and pipe service, oxygen sensor locations and testing.
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Body And Chassis:
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Door and lock mechanism repair, exterior trim replacement, interior panel removal, body panel alignment.
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Lighting System:
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Headlight, taillight, and interior lighting troubleshooting, bulb replacement, headlight aiming.
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Safety Systems:
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Airbag system diagnostics and replacement, seatbelt service, SRS component locations.
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Procedures Included
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Routine Maintenance:
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Oil changes, filter replacements (oil, air, fuel, cabin), spark plug replacement, brake fluid flush, coolant flush.
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Troubleshooting Diagnostics:
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Step-by-step diagnostic trees for common drivability, electrical, and mechanical issues.
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Major Component Overhaul:
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Engine rebuild procedures, transmission rebuilds, turbocharger replacement.
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Component Replacement:
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Detailed instructions for replacing virtually every component on the vehicle.
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Torque Specifications:
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Essential torque values for all critical fasteners throughout the vehicle.
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Special Tools:
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Identification and usage instructions for necessary Audi special tools.
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Technical Depth
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Depth Level:
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Complete factory-level service and repair information, suitable for professional technicians and advanced DIYers.
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Diagnostic Capability:
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Detailed explanation of diagnostic trouble codes (DTCs) and diagnostic strategies.
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Wiring Diagrams:
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Extensive and detailed electrical schematics for all vehicle systems.
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Engine Specifications
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Primary Engine
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Engine 1.8T Code:
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AEB (1997-1999), APB (2000), ATW (1999-2000), AWM (2000)
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Engine 1.8T Displacement:
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1.8 Liters (1781 cc)
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Engine 1.8T Configuration:
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Inline-4, turbocharged, DOHC, 20 valves
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Engine 1.8T Horsepower:
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150 hp @ 5700 rpm (all variants)
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Engine 1.8T Torque:
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155 lb-ft @ 1950 rpm (all variants)
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Performance
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Engine 2.8L V6 Code:
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AFC (1997-1998), AHA (1999-2001), ATQ (2001)
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Engine 2.8L V6 Displacement:
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2.8 Liters (2771 cc)
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Engine 2.8L V6 Configuration:
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V6, DOHC, 30 valves
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Engine 2.8L V6 Horsepower:
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170 hp @ 6000 rpm (AFC), 172 hp @ 6000 rpm (AHA/ATQ)
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Engine 2.8L V6 Torque:
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191 lb-ft @ 3200 rpm (AFC), 191 lb-ft @ 3200 rpm (AHA/ATQ)
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Fuel System
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Fuel Delivery:
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Electronic Fuel Injection (EFI)
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Recommended Fuel:
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Premium Unleaded Gasoline (91 AKI or higher for 1.8T, 87 AKI or higher for 2.8L V6)
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Maintenance
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Service Intervals
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Oil Change Interval:
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Typically every 7,500 miles or 12 months, whichever comes first, under normal driving conditions. Check manual for severe conditions.
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Timing Belt Replacement:
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Critical for 1.8T and 2.8L V6 engines. Intervals vary but generally around 70,000-100,000 miles. Failure to replace can cause catastrophic engine damage.
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Spark Plug Replacement:
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Recommended around 60,000-100,000 miles depending on plug type (e.g., platinum or iridium).
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Fluid Specifications
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Engine Oil Type:
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Refer to manual for specific viscosity (e.g., 0W-30, 5W-40). Often requires VW 500.00, 502.00, or 503.00 approved oil for turbocharged engines.
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Coolant Type:
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G12 or G12+ (Pink/Red) coolant. Typically a 50/50 mix with distilled water.
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Transmission Fluid Manual:
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API GL-4 or GL-5 gear oil, viscosity typically 75W-90. Specific Audi specifications apply.
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Transmission Fluid Automatic:
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G 052 162 A1 or equivalent (e.g., ATF Dexron III compatible fluid for some models). Check manual for specific type.
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Brake Fluid Type:
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DOT 4 brake fluid.
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Known Issues
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Ignition Coils:
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Premature failure of ignition coils, particularly on 1.8T engines, can cause misfires.
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Oil Leaks:
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Common oil leaks from valve cover gaskets, oil pan gaskets, and crank seals due to aging rubber seals.
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Suspension Components:
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Wear and tear on control arm bushings, ball joints, and tie rod ends, leading to steering looseness and uneven tire wear.
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Climate Control Flaps:
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Failure of the small plastic actuators controlling the HVAC blend doors, leading to loss of temperature control.
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Window Regulators:
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Failure of the electric window regulators, often due to plastic components breaking.
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Crankcase Ventilation System:
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Clogged crankcase ventilation (PCV) system can lead to increased oil consumption and seal failures.
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ABS Sensors:
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Failure of ABS wheel speed sensors can trigger ABS warning lights and disable ABS functionality.
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