Segment:
Compact Executive Sedan/Wagon
Positioning:
Audi's entry into the premium compact executive segment, competing with BMW 3 Series and Mercedes-Benz C-Class.
Key Competitors:
BMW 3 Series (E36/E46), Mercedes-Benz C-Class (W202), Alfa Romeo 155, Saab 900 NG, Volvo S40/V40.
Design Philosophy:
Sharp, understated styling, high-quality interior materials, advanced Quattro AWD system.
Platform Sharing:
Shared platform with the Volkswagen Passat B5 (MLB platform).
Engine:
Detailed diagnostics, repair, overhaul for all B5 engine variants (e.g., 1.6L, 1.8L, 2.4L V6, 2.8L V6, 1.9L TDI)
Transmission:
Manual (012, GFS series) and Automatic (01N, 01M, V4A51) transmission repair, overhaul, and diagnostics
Drivetrain:
Front-wheel drive (FWD) and Quattro all-wheel drive (AWD) system servicing, including differential and driveshaft repair
Suspension:
Front and rear suspension systems (e.g., multi-link front, torsion beam rear for FWD, independent rear for AWD), steering, and wheel alignment specifications
Brakes:
Hydraulic braking systems (ABS, EBD), brake pad/rotor replacement, caliper overhaul, brake fluid flush procedures
Electrical System:
Complete electrical schematics, wiring diagrams, component testing, diagnostics for lighting, ignition, charging, starting, comfort systems
Bodywork:
Body panel removal/installation, door mechanisms, interior trim, glass replacement, rust repair techniques
HVAC:
Climate control system diagnostics, refrigerant handling, component replacement (compressor, condenser, evaporator, heater core)
Fuel System:
Fuel pump, injectors, fuel filter replacement, fuel pressure testing, emissions control system diagnostics
Cooling System:
Radiator, water pump, thermostat, coolant hoses replacement, coolant flush and fill procedures
Maintenance:
Scheduled maintenance tasks, fluid changes (oil, coolant, brake, transmission), filter replacements, spark plug replacement
Troubleshooting:
Systematic diagnostic procedures for common and uncommon faults, error code interpretation
Repair:
Step-by-step instructions for component removal, repair, and reinstallation across all major vehicle systems
Rebuilds:
Detailed procedures for engine, transmission, and differential rebuilds, including torque specifications and clearances
Diagnostics:
Engine control unit (ECU) diagnostics, sensor testing, actuator testing, using diagnostic tools (e.g., VAG-COM)
Depth:
Comprehensive: Covers basic maintenance to complete engine and transmission overhauls, including electrical diagnostics and bodywork repairs.
Engine Codes Examples:
ADR, AHL, APU, ARK, AWT (1.8L), ACK, ALG, AML, AMX, APR, APS, AQE, ARJ (2.4L V6), AAH, ABC, AEJ, AKE, ALF, AMX, APU, AQK, ARJ, AWE, AWN, BFC (2.8L V6), AHU, AFN, AVG (1.9L TDI)
Horsepower Range:
74 kW (101 PS; 100 hp) to 142 kW (193 PS; 191 hp)
Torque Range:
145 Nm (107 lb-ft) to 280 Nm (207 lb-ft)
Injection Type:
Multi-point fuel injection (MPI) for gasoline, Direct Injection (DI) for TDI models (later B5.5).
Common Displacements:
1.6L, 1.8L (including 20v and Turbo), 1.9L TDI, 2.4L V6, 2.8L V6
Valve Actuation:
DOHC (Double Overhead Camshaft) for most engines, SOHC for some early 1.8L and V6 variants.
Length:
Approx. 4517 mm (177.8 in)
Width:
Approx. 1772 mm (69.8 in)
Height:
Approx. 1415 mm (55.7 in)
Wheelbase Length:
Approx. 2611 mm (102.8 in)
Curb Weight:
Approx. 1390 kg (3064 lbs) to 1580 kg (3483 lbs) depending on engine and drivetrain.
Trunk Volume:
Approx. 440 L (15.5 cu ft) for Sedan, 390 L (13.8 cu ft) for Avant (Wagon) with rear seats up.
Head Unit:
Factory Audi Symphony or Concert radio/CD players, optional CD changer.
Display:
Small LCD display for radio information and trip computer functions.
Cruise Control:
Optional cruise control system.
Phone Integration:
Optional hands-free phone preparation (Bluetooth often added aftermarket).
Headlights:
Halogen projector headlights, Xenon headlights optional on higher trims.
Oil Change Interval:
Typically 15,000 km (9,300 mi) or 1 year, whichever comes first (depending on oil specification and driving conditions).
Timing Belt Replacement:
Crucial for 1.8T, 2.4 V6, 2.8 V6 engines. Typically 90,000-120,000 km (56,000-75,000 mi) or 5-7 years. TDI engines use timing chains.
Engine Oil Type:
API SJ/SL, ACEA A3/B3 or A3/B4. Specific viscosities depend on engine and climate (e.g., 5W-40, 0W-30).
Coolant Type:
G12 or G12+ (pink/red) ethylene glycol-based coolant.
Transmission Fluid Manual:
GL-4 or GL-5 (depending on specific gearbox, check manual). Capacity approx. 2.0-2.5L.
Transmission Fluid Automatic:
G 052 162 A1/A2 (or equivalent ATF). Capacity varies, approx. 3.5-4.5L for a drain and fill.
Common Problems:
Timing belt tensioners/guides (non-TDI), coolant flange leaks, ABS sensor failures, window regulator failures, ignition coil issues (1.8T), oil leaks (valve cover gaskets, oil pan), catalytic converter failures (1.8T).
Inspections:
Regular checks of CV boots, exhaust system, suspension bushings, and all fluid levels.
