🏷️ Basic Information Identification Make: Hyundai Model: Sonata Year: 2004 Trim Levels Covered: All trims (e.g., GLS, LX) Codes Chassis Code: EF 👋 Introduction Market Position Vehicle Segment: Mid-size Sedan Target Audience: DIYers, independent repair shops, car enthusiasts Competitive Analysis Competitors: Toyota Camry, Honda Accord, Ford Fusion, Nissan Altima Key Features Manual Advantage: Licensed OE information, digital accessibility, comprehensive coverage Software Benefits: Instant access, cost-effective compared to print, user-friendly interface 📋 Manual Details Identification Manual Product Name: 2004 Hyundai Sonata Service & Repair Manual Software Software Vendor: RepairSurge Licensing: Officially Licensed, OE Material Derived Coverage Areas General Coverage: Comprehensive service and repair information for the 2004 Hyundai Sonata Major Systems: Engine, Drivetrain, Brakes, Suspension, Steering, HVAC, Electrical, Body, Interior Page Count Estimated Page Count: Thousands (digital format, content-rich) Manual Type Type: Service and Repair Manual Software Language Language: English Format Format: Online Software/Web-Based Access Access Duration Access Period: 1 Year (with discounts for additional years) 📖 Manual Coverage Systems Covered Engine Mechanical: Detailed procedures for engine overhaul, component replacement (pistons, rings, bearings, valves, camshafts, crankshafts), timing belt/chain service, lubrication system, cooling system Engine Performance: Fuel injection system diagnosis and repair, ignition system troubleshooting, emission control systems (EGR, EVAP), turbocharger system (if applicable), engine diagnostics Drivetrain: Front-wheel drive axle and CV joint service, differential maintenance, driveshaft repair Transmission Automatic: ATF fluid change and filter replacement, internal component diagnosis, torque converter service, shift solenoid replacement, transmission control module (TCM) diagnostics Transmission Manual: Clutch system service, transmission fluid change, internal gear and bearing replacement Brakes: Front and rear brake pad and rotor replacement, caliper service, brake fluid flush and bleed, ABS system diagnosis and repair, parking brake adjustment Suspension: Front and rear strut/shock absorber replacement, control arm service, ball joint replacement, sway bar links, wheel bearing replacement Steering: Power steering system diagnosis and repair, rack and pinion service, steering column components, tie rod end replacement Electrical System: Battery and charging system service, starter motor and alternator replacement, lighting system diagnosis and repair, power windows, power locks, sunroof operation, horn, wiper system Wiring Diagrams: Detailed electrical wiring diagrams for all major systems HVAC: Air conditioning system recharge and leak detection, heater core replacement, blower motor service, climate control system diagnosis Body And Interior: Door panel removal, seat adjustment and replacement, dashboard components, exterior panel alignment, bumper replacement, glass replacement Procedures Included Maintenance: Regular scheduled maintenance, oil and filter changes, fluid level checks and top-offs, air filter replacement, spark plug replacement Troubleshooting: Diagnostic trouble codes (DTCs), symptom-based troubleshooting guides Repair: Step-by-step repair procedures for all covered systems Installation: Component installation and replacement guides Specifications: Torque specifications for all fasteners, fluid capacities, electrical specifications Technical Depth Depth: Detailed diagnostics, component-level repair, complete vehicle overhauls 📊 Manual Specifications File Format File Type: Web-based software accessed via internet browser Compatibility: PC, Laptop, Smartphone, Tablet with internet connection and web browser Print Quality Printability: Content can be printed for offline reference Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Options: 2.4L Inline-4 (G4JP), 2.7L V6 (G6BA) Performance 2.4L Horsepower: Approximately 138 hp @ 5500 rpm 2.4L Torque: Approximately 147 lb-ft @ 4000 rpm 2.7L V6 Horsepower: Approximately 170 hp @ 5500 rpm 2.7L V6 Torque: Approximately 180 lb-ft @ 4000 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) Engine Management ECU: Engine Control Unit (ECU) with diagnostic capabilities Maintenance Spark Plugs: NGK or equivalent (specific part number varies by engine) 🔧 Transmission Standard Standard Transmission: 5-speed Manual Transmission (MT) Optional Optional Transmission: 4-speed Automatic Transmission (AT) Features Automatic Transmission Type: F4A42 (for 2.4L), F5A51 (for 2.7L V6) Fluid Specifications Automatic Transmission Fluid: Hyundai SPIII or equivalent ATF Manual Transmission Fluid: GL-4 75W-90 gear oil 📐 Dimensions Exterior Length: Approximately 188.0 inches Width: Approximately 70.1 inches Height: Approximately 57.1 inches Wheelbase: Approximately 106.7 inches Weights Curb Weight 2.4L: Approx. 3,100 - 3,200 lbs Curb Weight 2.7L V6: Approx. 3,250 - 3,350 lbs 🛡️ Safety Features Ratings NHTSA Front Impact Driver: Good NHTSA Front Impact Passenger: Good NHTSA Side Impact Front Seat: Good NHTSA Side Impact Rear Seat: Good IIHS Frontal Offset: Acceptable Active Features ABS: Standard Traction Control: Optional on some trims Passive Features Airbags Front: Standard dual front airbags Airbags Side: Optional front side airbags Seatbelts: Pretensioners and load limiters on front seats 💡 Technology Features Infotainment Audio System: Factory AM/FM/CD player, optional premium audio system Connectivity: Limited by modern standards; no Bluetooth or USB typically standard. Auxiliary input may be present on some audio systems. Driver Assistance Cruise Control: Standard on most trims Comfort Features Climate Control: Manual or automatic climate control depending on trim 🔧 Maintenance Service Intervals Oil Change Interval: Every 7,500 miles or 6 months (synthetic oil recommended), or as per severe service schedule Engine Air Filter: Inspect every 7,500 miles, replace as needed...