🏷️ Basic Information Identification Make: Hyundai Model: Sonata Year: 1991 Product Type: Service & Repair Manual Software 👋 Introduction Market Position Target Audience: DIY Enthusiasts, Independent Repair Shops, Hyundai Owners Competitive Analysis Advantage: Online accessibility, licensed OE data, cost-effectiveness compared to printed manuals and dealership services Key Features Digital Convenience: Instant access from any internet-enabled device (PC, laptop, smartphone, tablet) Data Source: Licensed information derived from OE (Original Equipment) materials by RepairSurge 📋 Manual Details Coverage Areas Primary Coverage: 1991 Hyundai Sonata Page Count Estimated Pages: Extensive (Digital Format) Manual Type Type: Official Licensed Service and Repair Manual Language Language: English Format Format: Online Software (Web Browser Accessible) 📖 Manual Coverage Systems Covered Engine: Engine Mechanical, Engine Lubrication, Cooling System, Fuel System, Emission Control System, Ignition System, Starting System, Charging System Drivetrain: Clutch, Manual Transmission, Automatic Transmission, Driveshafts, Axles Brakes: Brake System, Hydraulic System, Parking Brake, ABS (if applicable) Suspension Steering: Front Suspension, Rear Suspension, Steering System Electrical: Wiring Diagrams, Lighting System, Instruments and Gauges, Power Accessories, Cruise Control, Body Electrical Systems HVAC: Heating, Ventilation, and Air Conditioning (HVAC) System Body: Body and Frame, Exterior Trim, Interior Trim, Doors, Windows, Seats Procedures Included Maintenance: Scheduled Maintenance, Oil Changes, Filter Replacements, Fluid Checks and Replacements, Tune-Ups Diagnostics: Troubleshooting Charts, Diagnostic Procedures for All Systems, Component Testing Repair: Component Removal and Installation, Major Overhauls, Component Rebuilding Technical Depth Depth: Comprehensive Factory-Derived Information for DIY and Professional Technicians 📊 Manual Specifications File Format Access Method: Web Browser, Requires Internet Connection Print Quality Digital Quality: High Resolution, Searchable Text, Printable Sections Binding Type Binding: N/A (Digital Access) Paper Type Paper: N/A (Digital Format) Access Duration Subscription Length: 1 Year Access (Renewable) ⚙️ Engine Specifications Primary Engine Engine Code Options: G4CP (2.0L SOHC I4), G4CP-A (2.0L DOHC I4), G4CP-B (2.4L SOHC I4) Performance Horsepower 2.0L: Approx. 108-120 hp (depending on configuration) Torque 2.0L: Approx. 120-135 lb-ft (depending on configuration) Horsepower 2.4L: Approx. 125 hp Torque 2.4L: Approx. 137 lb-ft Fuel System Induction: Electronic Fuel Injection (EFI) Maintenance Spark Plugs: Refer to manual for specific part numbers and gap settings (e.g., NGK BKR5ES-11, gap 0.044 inches) Engine Oil Type: API SG or SH, SAE 10W-30 (or 5W-30 in very cold climates) Engine Oil Capacity: Approx. 4.0 - 4.5 quarts (with filter) depending on engine 🔧 Transmission Standard Transmission Type Standard: 5-Speed Manual Transmission Optional Transmission Type Optional: 4-Speed Automatic Transmission Features Automatic Features: Electronically controlled, Overdrive Maintenance Manual Transmission Fluid: API GL-4, SAE 75W-90 Automatic Transmission Fluid: Dexron III (or equivalent) 📐 Dimensions Exterior Length: Approx. 182.1 inches Width: Approx. 68.5 inches Height: Approx. 54.1 inches Wheelbase: Approx. 104.3 inches Weights Curb Weight: Approx. 2,800 - 3,000 lbs (depending on trim and engine) Gross Vehicle Weight Rating: Refer to vehicle placard Cargo Trunk Volume: Approx. 15.0 cu ft 🛡️ Safety Features Ratings NHTSA Crash Test Results: Specific ratings for 1991 models are not readily available in standardized formats as used today. Refer to manual for vehicle-specific safety features. Active Features ABS: Available on some models/trims Passive Features Airbags: Driver-side airbag standard on most trims Seat Belts: Front and rear seat belts, front seat belt pretensioners 💡 Technology Features Infotainment Audio System: Factory AM/FM stereo with cassette player, optional CD player on higher trims Speakers: Typically 4 speakers Driver Assistance Cruise Control: Optional Connectivity Bluetooth Aux: Not available on original equipment 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,750 miles or 6 months, whichever comes first Air Filter Replacement: Every 15,000 miles or 12 months Spark Plug Replacement: Every 30,000 miles Timing Belt Replacement: Every 60,000 miles or 4 years (critical for interference engines) Fluid Specifications Coolant Type: Ethylene Glycol based antifreeze, 50/50 mix with distilled water Brake Fluid Type: DOT 3 Power Steering Fluid: ATF Dexron III (or equivalent) Known Issues Engine Mounts: Can wear out over time, leading to vibration and noise Suspension Components: Ball joints, tie rod ends, and bushings can wear, affecting steering and ride comfort Electrical Connectors: Corrosion or loose connections can cause intermittent issues, particularly in older vehicles Exhaust System: Rust and corrosion can lead to leaks or component failure 📚 Vehicle History Brand Heritage Hyundai History: Hyundai Motor Company, founded in 1967, is a South Korean multinational automotive manufacturer. Known for producing affordable and reliable vehicles. Model Evolution Sonata Generation: First Generation (Y1) 1988-1993. The 1991 model year represents a refinement of the initial design. Production Manufacturing Plant: Ulsan, South Korea Model Notes Design Influence: Early models were based on platform sharing with Mitsubishi models. 🏆 Awards & Recognition Recognitions Industry Awards: Specific awards for the 1991 Sonata are not prominently documented. Focus was on market penetration and value proposition.