🏷️ Basic Information Identification Make: Volkswagen Model: Jetta Year: 2004 Codes Chassis Code: A4 (Mk4) 👋 Introduction Market Position Positioning: The Volkswagen Jetta (A4/Mk4) was positioned as a compact sedan offering European driving dynamics, build quality, and a more premium feel than many competitors in its segment. Competitive Analysis Competitors: Key competitors included the Honda Civic, Toyota Corolla, Ford Focus, Mazda3, and Chevrolet Cavalier/Cobalt. Key Features Features: Known for its solid chassis, refined ride, accessible powertrain options, and German engineering heritage. Manual Purpose Target Audience: Mechanics and DIY enthusiasts seeking accurate, factory-level repair and maintenance information. 📋 Manual Details Coverage Areas Manual Type: Factory Service Repair Manual Language: English Format: Digital (likely PDF, though not explicitly stated, common for this era) 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed disassembly, assembly, inspection, and repair of all engine components, including cylinder head, pistons, crankshaft, camshafts, timing systems, and lubrication. Engine Management: Diagnosis and repair of fuel injection systems (MPI), ignition systems, emissions control systems, and engine control module (ECM) functions. Transmission Manual: Repair and overhaul procedures for manual transmissions, including clutch, gearbox internals, and shifting mechanisms. Transmission Automatic: Diagnostic and repair procedures for automatic transmissions (likely 4-speed or 5-speed depending on engine), including valve body, torque converter, and electronic controls. Suspension Steering: Repair and adjustment of front and rear suspension components (MacPherson struts, torsion beams/multi-link), power steering system, and steering rack. Brakes: Detailed service and repair for hydraulic brake systems, including ABS, brake calipers, rotors, pads, master cylinder, and brake fluid specifications. Electrical System: Comprehensive wiring diagrams, troubleshooting guides for all electrical components, including lighting, starting/charging system, power windows, locks, and interior electronics. HVAC: Diagnosis and repair of heating, ventilation, and air conditioning systems, including refrigerant handling and component replacement. Body And Trim: Procedures for exterior and interior trim removal/installation, body panel repair, door mechanisms, and glass replacement. Procedures Included Maintenance: Routine scheduled maintenance, fluid changes, filter replacements, spark plug service, and belt inspections. Troubleshooting: Systematic diagnostic procedures and fault finding for common and uncommon issues, often with flowcharts. Repair: Step-by-step instructions for the removal, disassembly, reassembly, and installation of all vehicle components. Adjustment: Procedures for calibrating and adjusting various systems, such as throttle position sensor, idle speed, and suspension alignment. Technical Depth Depth: Comprehensive, covering everything from basic fluid checks to complete engine and transmission rebuilds, including torque specifications and specialized tool requirements. 📊 Manual Specifications File Format File Type: Likely PDF (Portable Document Format) Searchability: Typically searchable text within PDF for quick information retrieval. Print Quality Printability: Designed for printing, with clear diagrams and text layouts. Binding Type Binding: If printed, would typically be a spiral-bound or comb-bound format for lay-flat use in a workshop. Paper Type Paper Quality: If printed, likely on durable, coated paper to withstand workshop conditions. ⚙️ Engine Specifications Primary Engine Engine Options 2004: 2.0L (8-valve SOHC) ABA, 2.0L (20-valve DOHC) AEG/APK/AQY, 1.8L (20-valve DOHC) Turbocharged AGU/AWP/AUQ (GLI models). Performance 2.0L Sohc (Aba): Approx. 115 hp @ 5200 rpm, 122 lb-ft @ 2600 rpm 2.0L DOHc (Aeg/Apk/Aqy): Approx. 115 hp @ 5000 rpm, 122 lb-ft @ 3200 rpm 1.8L Turbo (Awp/Auq): Approx. 180 hp @ 5500 rpm, 173 lb-ft @ 1950-4700 rpm (with overboost) Fuel System Injection Type: Electronic Multi-Port Fuel Injection (MPI) Fuel Requirement: 87 octane regular unleaded (non-turbo), 91 octane premium unleaded (turbocharged 1.8T) Engine Codes Manual References Common Engine Codes: ABA, AEG, APK, AQY, AGU, AWP, AUQ 🔧 Transmission Standard Standard Transmission Options: 5-speed Manual Transmission Optional Optional Transmission Options: 4-speed Automatic Transmission (01M) for 2.0L engines, 5-speed Automatic Transmission (01N) for 1.8T engines. Features Clutch Type: Dry single-plate clutch (manual transmission) Automatic Features: Selectable modes (e.g., Sport/Comfort) may be present on some automatic transmissions. 📐 Dimensions Exterior Length: Approx. 171.4 inches (4353 mm) Width: Approx. 68.3 inches (1735 mm) Height: Approx. 56.1 inches (1425 mm) Wheelbase: Approx. 101.5 inches (2578 mm) Cargo Trunk Volume: Approx. 15.1 cubic feet (428 liters) Weights Curb Weight: Ranges from approx. 2950 - 3250 lbs (1340 - 1475 kg) depending on engine and trim. 🛡️ Safety Features Ratings NHTSA Front Impact: 5-Star (Driver and Passenger) NHTSA Side Impact: 4-Star (Front), 5-Star (Rear) Active Features ABS: Standard Anti-lock Braking System (ABS) Traction Control: Optional Traction Control System (TCS) on some models. Passive Features Airbags: Standard dual front airbags, optional side-impact airbags. Seatbelts: Three-point front and rear seatbelts, pretensioners, and load limiters for front occupants. 💡 Technology Features Infotainment Head Unit Options: Factory installed radio/cassette player, optional CD player, and premium sound systems (e.g., Monsoon). Display Technology: Basic LCD displays for radio information, clock, and climate control. No integrated navigation or color screens. Driver Assistance Cruise Control: Standard on most trims. Parking Sensors: Not typically available from the factory for this model year. Connectivity Auxiliary Input: Not standard. May be available as an aftermarket option or dealer accessory....