🏷️ Basic Information Identification Make: Hyundai Model: Sonata Year: 2003 Model Code: EF-B (Third Generation) Generation Generation Name: Third Generation (EF) Generation Years: 1998-2004 👋 Introduction Market Position Segment: Mid-size sedan Competitive Analysis Competitors 2003: Toyota Camry, Honda Accord, Ford Taurus, Chevrolet Impala, Nissan Altima Key Features Manual Advantage: Convenient online access, comprehensive OE data, up-to-date information compared to print manuals, cost-effective DIY solution 📋 Manual Details Coverage Areas Primary Coverage: 2003 Hyundai Sonata Service & Repair Manual Software Page Count Estimated Pages: Thousands (digital format, comprehensive) Manual Type Type: Online Service and Repair Manual Software Language Language: English Format Format: Web-based Software (accessible via browser) 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, fuel system, ignition system, cooling system, lubrication system, exhaust system, emissions control Drivetrain Systems: Automatic transmission, manual transmission, clutch, drive axles, differential Chassis Systems: Suspension (front and rear), steering system, brake system (hydraulic, ABS), wheels and tires Electrical Systems: Wiring diagrams, lighting system, starting and charging system, instrument cluster, body electrical components, power accessories HVAC Systems: Heating, ventilation, and air conditioning (HVAC) system components and operation Body And Interior: Body panels, doors, windows, interior trim, safety restraint systems (airbags, seatbelts) Procedures Included Maintenance: Scheduled maintenance, fluid changes, filter replacements, inspections Repair: Component removal, installation, and repair for all major systems Diagnostics: Troubleshooting guides, diagnostic trouble codes (DTCs) interpretation, diagnostic procedures Technical Depth Depth: Factory-level technical information, comprehensive diagnostic procedures, detailed repair instructions, component specifications 📊 Manual Specifications File Format Software Platform: Web-based access via standard internet browser Print Quality Print Capability: Printable sections and diagrams Binding Type Access Method: Online subscription Paper Type Content Source: Licensed OE (Original Equipment) materials ⚙️ Engine Specifications Primary Engine Engine Option 1: 2.4L Inline-4 (G4JP) Engine Option 2: 2.7L V6 (G6BA) Performance 2.4L Hp: 149 hp @ 6000 rpm 2.4L Torque: 195 Nm (144 lb-ft) @ 4000 rpm 2.7L V6 Hp: 170 hp @ 5500 rpm 2.7L V6 Torque: 245 Nm (181 lb-ft) @ 4000 rpm Fuel System Fuel Delivery: Multi-port Fuel Injection (MPI) Recommended Fuel: 87 Octane Unleaded Gasoline 🔧 Transmission Standard Transmission Standard: 5-speed Manual Transmission (for some trims/engines) Optional Transmission Optional: 4-speed Automatic Transmission (with overdrive) Features Automatic Transmission Type: H-Matic (Sequential Shift Control on some models) 📐 Dimensions Exterior Length: 4805 mm (189.2 in) Width: 1795 mm (70.7 in) Height: 1420 mm (55.9 in) Wheelbase: 2700 mm (106.3 in) Weights Curb Weight Min: 1470 kg (3241 lbs) Curb Weight Max: 1545 kg (3406 lbs) 🛡️ Safety Features Ratings NHTSA Front Driver Impact: Good NHTSA Front Passenger Impact: Good IIHS Front Offset Crash Rating: Acceptable Active Features ABS: Standard on most models Traction Control: Optional on some models Passive Features Airbags Front: Driver and front passenger airbags Airbags Side: Optional front side-impact airbags Seatbelts: Front pretensioners and load limiters 💡 Technology Features Infotainment Audio System: AM/FM stereo with CD player, optional premium audio system Driver Assistance Cruise Control: Standard on most trims Connectivity Auxiliary Input: Not typically available for this model year 🔧 Maintenance Service Intervals Oil Change Interval: 7,500 miles or 6 months (synthetic blend), 10,000 miles or 12 months (full synthetic) Air Filter Replacement: Every 30,000 miles or as needed Spark Plug Replacement 4Cyl: 100,000 miles (Iridium type) Spark Plug Replacement V6: 100,000 miles (Iridium type) Fluid Specifications Engine Oil Viscosity: 5W-20 or 5W-30 (check owner's manual for specific engine) Engine Oil Capacity: Approx. 4.5 qts (4.3 L) for 2.4L, Approx. 5.0 qts (4.7 L) for 2.7L V6 Coolant Type: Hyundai Super Long Life Coolant (or equivalent OAT/HOAT coolant) Transmission Fluid Type Auto: Hyundai ATF SP-III (or equivalent) Brake Fluid Type: DOT 3 Known Issues Common Problem 1: Premature wear of front suspension components (ball joints, control arm bushings) Common Problem 2: Oil leaks from valve cover gasket or oil pan gasket Common Problem 3: Catalytic converter failure (especially on higher mileage vehicles) Common Problem 4: Power window motor failure or regulator issues Common Problem 5: HVAC blower motor resistor failure 📚 Vehicle History Brand Heritage Brand Focus: Value, reliability, and increasingly sophisticated design Model Evolution Sonata Introduction Year: 1988 Third Gen Facelift Year: 2001 Production Production Locations: Ulsan, South Korea; Brampton, Ontario, Canada 🏆 Awards & Recognition Recognitions Safety Award 2003: IIHS Top Safety Pick (2003 model year)