Engine Mechanical:
        
        
            Complete overhaul, timing belt/chain, pistons, crankshaft, cylinder heads, valvetrain.
        
     
    
        
            Engine Management:
        
        
            ECU, sensors, fuel injection, ignition system, emissions control.
        
     
    
        
            Transmission Manual:
        
        
            Clutch, gearbox, internal components, shifting mechanism.
        
     
    
        
            Transmission Automatic:
        
        
            Torque converter, valve body, planetary gears, electronic controls.
        
     
    
        
            Drivetrain:
        
        
            Front-wheel drive, all-wheel drive (Quattro) systems, drive shafts, CV joints, differentials.
        
     
    
        
            Suspension:
        
        
            Front McPherson struts, rear torsion beam or multi-link (depending on specific model/drivetrain), shock absorbers, springs, control arms, bushings.
        
     
    
        
            Steering:
        
        
            Power steering system, steering rack, column, tie rod ends.
        
     
    
        
            Brakes:
        
        
            Hydraulic system, ABS, EBD, brake pads, rotors, calipers, master cylinder, brake lines.
        
     
    
        
            Electrical System:
        
        
            Battery, alternator, starter, wiring diagrams, fuses, relays, lighting, body control module (BCM).
        
     
    
        
            HVAC:
        
        
            Air conditioning, heating, climate control, blower motor, evaporator, condenser, refrigerant.
        
     
    
        
            Body And Chassis:
        
        
            Frame, body panels, doors, windows, interior trim, bumpers.
        
     
    
        
            Safety Systems:
        
        
            Airbags, seatbelt pre-tensioners, ABS module.
        
     
    
    
        
            Scheduled Maintenance:
        
        
            Oil changes, filter replacements, fluid checks and flushes, spark plugs, belts.
        
     
    
        
            Component Disassembly Assembly:
        
        
            Detailed instructions for removing and reinstalling all major and minor components.
        
     
    
        
            Troubleshooting Diagnostics:
        
        
            Fault code interpretation, symptom-based diagnostics.
        
     
    
        
            Electrical Troubleshooting:
        
        
            Using wiring diagrams, testing circuits, component testing.
        
     
    
        
            Engine Rebuilding:
        
        
            Complete engine overhauls, piston ring replacement, bearing replacement.
        
     
    
        
            Brake Service:
        
        
            Pad and rotor replacement, caliper service, brake fluid bleeding.
        
     
    
        
            Suspension And Steering Repair:
        
        
            Component replacement, alignment specifications.
        
     
    
        
            Bodywork And Collision Repair:
        
        
            Panel replacement, dent repair guidance.
        
     
    
        
            HVAC System Service:
        
        
            Refrigerant charging, component replacement.
        
     
    
    
        
            Depth:
        
        
            Comprehensive, suitable for professional technicians and advanced DIY enthusiasts. Includes detailed specifications, torque values, diagnostic procedures, and repair strategies.
        
     
 
    
    
    
        
            Engine 1 Displacement:
        
        
            1.6L (AWH, ALZ)
        
     
    
        
            Engine 2 Displacement:
        
        
            1.8L Turbocharged (AEB, APU, ARK, AUM, AUQ)
        
     
    
        
            Engine 3 Displacement:
        
        
            1.9L TDI Diesel (AGR, ALH, AHF, ASV)
        
     
    
        
            Engine 4 Displacement:
        
        
            2.0L (AZJ, AZM)
        
     
    
        
            Engine 5 Displacement:
        
        
            2.3L VR5 (AGZ, AQN)
        
     
    
    
        
            Horsepower Range:
        
        
            Approximately 100 hp (1.6L) to 170 hp (2.3L VR5).
        
     
    
        
            Torque Range:
        
        
            Varies significantly by engine. Turbocharged engines offer higher torque figures.
        
     
    
    
        
            Fuel Delivery:
        
        
            Multi-point Fuel Injection (MPI) or Electronic Fuel Injection (EFI), common rail direct injection for TDI.
        
     
    
    
        
            ECU Type:
        
        
            Bosch Motronic or Simos, depending on engine variant.
        
     
 
    
    
    
        
            Type:
        
        
            5-speed Manual (e.g., DUH, DPA, ERT, ERF)
        
     
    
    
        
            Type:
        
        
            4-speed Automatic (e.g., AG4, AG7) or 5-speed Tiptronic Automatic.
        
     
    
    
        
            Drivetrain:
        
        
            Front-Wheel Drive (FWD) standard, optional quattro All-Wheel Drive (AWD).
        
     
    
    
        
            Manual Spec:
        
        
            GL-4 or GL-5 Gear Oil (specific viscosity varies, e.g., 75W-90)
        
     
    
        
            Automatic Spec:
        
        
            G 052 162 A2 or equivalent ATF (e.g., Dexron III)
        
     
 
    
    
    
        
            Oil Change Interval:
        
        
            Typically 15,000 km (9,300 miles) or 12 months, often utilizing flexible 'LongLife' servicing.
        
     
    
        
            Timing Belt:
        
        
            Recommended replacement every 90,000 - 120,000 km (56,000 - 75,000 miles) or 5-7 years for relevant engines (e.g., 1.8T, 2.0).
        
     
    
    
        
            Engine Oil:
        
        
            Typically VW 502 00 or 503 00/503 01 specification synthetic oil, viscosity 0W-30, 5W-30, or 5W-40 depending on climate and engine.
        
     
    
        
            Coolant:
        
        
            G 12 Plus (pink) or G 12 (red) coolant concentrate mixed with distilled water (50/50 ratio).
        
     
    
    
    
        
            Ignition Coils:
        
        
            Coil-on-plug ignition coils can be a common failure point on the 1.8T engine, leading to misfires.
        
     
    
        
            Turbocharger Issues:
        
        
            Oil leaks, wastegate issues, and intercooler pipe cracks can affect the 1.8T.
        
     
    
        
            Suspension Components:
        
        
            Worn control arm bushings and front strut mounts are common due to mileage.
        
     
    
        
            Window Regulators:
        
        
            Plastic components in the window regulator mechanisms can become brittle and fail.
        
     
    
        
            Eletric Window Switches:
        
        
            Driver's side door module and window switches can fail.
        
     
    
        
            Climate Control Actuators:
        
        
            Blend door actuators for HVAC system can fail, leading to incorrect temperature or air direction.