Engine:
Complete overhaul, rebuilding, performance tuning, timing belt, serpentine belt, ignition system, fuel system, cooling system, lubrication system, emissions control.
Transmission:
Removal, installation, in-car servicing, clutch operation (manual), torque converter (automatic), transmission control systems, fluid specifications, common issues.
Brakes:
Hydraulic system, ABS (Anti-lock Braking System), EBD (Electronic Brake-force Distribution), brake pad/rotor replacement, caliper service, bleeding procedures, parking brake, fluid specifications.
Suspension:
Front and rear suspension components, struts, shocks, control arms, bushings, steering knuckle, wheel bearing replacement, alignment procedures and specifications.
Electrical System:
Wiring diagrams, lighting system, starter, alternator, battery, fuse box layout, relays, power windows, central locking, interior/exterior lighting, diagnostic trouble codes (DTCs).
Body:
Exterior panel removal/installation, doors, hood, trunk, bumpers, sunroof operation and repair, interior trim, glass replacement, seals.
HVAC:
Air conditioning system servicing, refrigerant handling (R134a), compressor, condenser, evaporator, blower motor, cabin filter replacement, heater core, system capacities.
Engine Management:
ECU (Engine Control Unit) functions, sensor inputs (MAF, MAP, O2, crank, cam, coolant temp), actuator outputs (injectors, ignition coils, throttle body), emission control systems (EVAP, secondary air injection).
Exhaust System:
Component identification (catalytic converter, mufflers, resonators), diagnosis of leaks, replacement procedures.
Fuel System:
Fuel pump testing, fuel filter replacement, fuel injector cleaning and testing, fuel pressure regulation.
Vacuum Diagrams:
Comprehensive vacuum routing diagrams for emissions control and various engine functions.
Steering System:
Power steering pump, steering rack, tie rod ends, hydraulic fluid, bleeding procedures.
Cooling System:
Radiator, thermostat, water pump, hoses, fan operation, coolant capacity, and flush procedures.
Maintenance:
Oil and filter changes, spark plug replacement, air filter replacement, cabin filter replacement, coolant flush and fill, brake fluid flush, transmission fluid change, differential fluid change (if applicable).
Troubleshooting Diagnostics:
Diagnostic trouble code interpretation, symptom-based troubleshooting, electrical circuit testing, vacuum leak detection, engine performance diagnosis, emissions system diagnosis.
Repair:
Component replacement (e.g., water pump, alternator, starter, control arms, CV joints, brake calipers), engine rebuilding, transmission repair, cylinder head gasket replacement, fuel pump replacement.
Installation:
Engine installation, transmission installation, suspension component installation, body panel installation, interior component installation.
Diagnostics Computer:
Procedures for using OBD-II scanners, interpreting diagnostic trouble codes (DTCs), live data stream analysis, actuator testing.
Wheel Alignment:
Detailed specifications for camber, caster, toe, and thrust angle for front and rear axles. Procedures for adjustment.
Torque Specifications:
Extensive list of torque values for critical fasteners throughout the vehicle, including engine components, suspension, brakes, and chassis.
U Joint Cv Joint:
Service and replacement procedures for Constant Velocity (CV) joints and Universal joints (if applicable to specific drivetrain configurations).
Engine Rebuilding:
Detailed instructions for cylinder head disassembly and assembly, piston and connecting rod installation, crankshaft installation, bearing clearances, and engine block machining specifications.
Serpentine Belt:
Routing diagrams and replacement procedures for serpentine accessory drive belts.
Clutch Service:
Clutch disc, pressure plate, and release bearing replacement procedures for manual transmission vehicles.
Depth:
Comprehensive, covering everything from basic fluid changes to complete engine and transmission overhauls, including detailed diagnostic procedures and wiring schematics.
Wiring Diagrams Detail:
Comprehensive, color-coded wiring schematics for all major electrical systems, including engine, transmission, body, chassis, and infotainment.
Illustrations Count:
Hundreds of detailed illustrations, diagrams, and exploded views to aid in understanding repair procedures.
Diagnostic Charts:
Computer diagnostic trouble tree charts designed to systematically diagnose electrical and mechanical faults.
Engine Options:
1.6L I4 (ADP, AHL), 1.8L I4 (ADR, AEB, APU, APT, ARG, AVV), 1.8L Turbo I4 (AEB, APU, APT, ARG, AVC, AWL, AWM), 2.4L V6 (APR, AQD, BDV), 2.8L V6 (AFC, ACK, ALG, AMX, APR, AQD, ATX, BBG, BCY, BFG, BHF).
Horsepower Range:
100 hp (1.6L) to 200 hp (2.8L V6).
Torque Range:
140 Nm (1.6L) to 280 Nm (2.8L V6).
Injection Type:
Multi-point Fuel Injection (MPI) and Direct Injection (FSI on some later models, though primarily MPI for B5).
Oil Change Interval:
Typically every 10,000 miles or 12 months, whichever comes first, using synthetic oil. Refer to owner's manual for exact intervals based on driving conditions and specific engine.
Timing Belt Interval:
Typically every 70,000 - 90,000 miles or 5-7 years for the 1.8T and V6 engines. Crucial to replace this on schedule to prevent catastrophic engine damage.
Engine Oil Type:
API SJ or higher, ACEA A3/B3 or A3/B4, viscosity typically 0W-30, 5W-30, or 5W-40 depending on ambient temperature and engine. Refer to manual for precise specifications.
Coolant Type:
G12 or G12+ (pink/red), ethylene glycol-based. Mixture of 50/50 coolant and distilled water.
Transmission Fluid Manual:
G 052 171 A1 (or equivalent MTF).
Transmission Fluid Automatic:
G 055 025 (LT71141) for 5-speed Tiptronic. Refer to manual for specific transmission fluid for other automatic gearboxes.
Common Problems:
Oil leaks (valve cover gaskets, oil pan gaskets), coolant leaks (thermostat housing, water pump seals, hoses), timing belt tensioner failure (on 1.8T), ignition coil failure (1.8T), ABS sensor failures, headlight condensation, sagging headliner, window regulator failures, front suspension component wear (control arm bushings, tie rod ends).
