The mid-size sedan, was produced in 2004 as part of its second generation. This model, identified by the chassis code GD, offered a reliable and value-oriented option within its segment, featuring various engine configurations, likely including a 2.4L inline-4 and a 2.7L V6. Known for its practical design and solid engineering, the 2004 provided a comfortable driving experience and a range of features, making it a popular choice for owners and a capable vehicle for daily use and longer journeys. This comprehensive factory service repair manual provides full coverage for all styles of the 2004. It details everything from general maintenance and periodic lubrication to in-depth engine service, transmission repair, and complex electrical system diagnostics. With step-by-step repair procedures, troubleshooting guides, and detailed wiring diagrams, this manual is an essential resource for owners, DIY enthusiasts, and professional mechanics, enabling informed decisions and efficient maintenance to keep the vehicle in optimal condition. 🏷️ Basic Information Identification Make: Kia Model: Optima Year: 2004 Codes Chassis Code: GD 👋 Introduction Market Position Target Audience: Kia Optima 2004 owners, DIY enthusiasts, professional mechanics Segment: Mid-size sedan segment. Competitive Analysis Authenticity: Actual Genuine Repair Service Factory Manuals (not 3rd party) Key Features Usability: Easy to use, no advanced computer skills required, print desired pages Value Proposition Cost Savings: Potential to save $50-$60 per hour on shop labor costs Information Depth Knowledge Source: Provides knowledge of factory-trained technicians Benefits Empowerment: Enables owners to make informed decisions about maintenance and repair 📋 Manual Details Coverage Areas Primary Coverage: Full factory service and repair Trim Level Coverage: All styles covered Page Count Estimated Pages: Hundreds (specific count not provided, but implied to be extensive) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Powertrain: Engine Service/Repair, Transmission Service/Repair, Fuel Injection/Fuel System, Cooling System, Emission System, Engine Control System, Differential/Drive, Axle Chassis And Suspension: Brake System, Suspension, Steering Electrical And Electronics: Wiring Diagram, Electrical System Comfort And Convenience: Heater/Air Conditioning, Interior Body And Safety: Chassis/Body, Restraint System Power Steering: Power steering system service and repair procedures. Fuel System: Fuel injection system diagnostics, fuel pump, injectors, and fuel lines. Procedures Included Maintenance: General Maintenance, Periodic Lubrication Diagnostics: Troubleshooting, Advanced Troubleshooting Guide Repair And Rebuild: Step-by-step repair procedures for all covered systems Body And Trim: Chassis/Body sections cover structural repairs, body panel replacement, and interior trim removal/installation. Wheel And Tire: Wheel alignment, tire specifications, and related suspension components covered. Technical Depth Depth: Comprehensive (covers fundamentals to complete rebuilds, same information as professional technicians) Diagnostic Codes: The manual likely includes OBD-II diagnostic trouble codes (DTCs) and troubleshooting procedures for engine and transmission control modules. 📊 Manual Specifications File Format Format: PDF Compatibility: All PC-based Windows operating systems and Mac Print Quality Printability: Printable without any restriction (entire manual or specific pages) Resolution: High Resolution Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Search And Navigation Search Functionality: Searchable PDF for easy information retrieval Illustrations And Diagrams Content: All necessary illustrations, diagrams, and photos Detail Level: Detailed illustrations, drawings, photos, and enlarged insets for part examination. ⚙️ Engine Specifications Primary Engine Engine Options: Likely 2.4L Inline-4 (G4JS) and 2.7L V6 (G6BA) based on typical Optima configurations for this generation. Specific engines covered depend on the detailed contents of the manual. Performance Horsepower Torque: Specific figures for each engine variant covered within the manual (e.g., 2.4L: ~140-150 hp, 2.7L V6: ~170-180 hp). Accurate data requires consulting the manual's engine sections. Fuel System Fuel Delivery: Multi-point fuel injection (MPI) for both engine variants. Emissions Control: Emission System coverage includes diagnosis and repair of components related to emissions control. Engine Management ECU Coverage: Engine Control System (ECU) diagnostics and repair procedures included. 🔧 Transmission Standard Transmission Type Standard: Likely a 5-speed manual transmission for base models. Optional Transmission Type Optional: Likely a 4-speed automatic transmission (F4A51) for most variants. Features Transmission Service: Detailed service and repair procedures for both manual and automatic transmissions. 📐 Dimensions Exterior Wheelbase: Approximately 106.3 inches (2700 mm) for the GD platform. Length: Approximately 187.4 inches (4760 mm) for the GD platform. Weights Curb Weight: Varies by engine and trim, typically ranging from ~3100 lbs to ~3400 lbs. 🛡️ Safety Features Ratings NHTSA Front Impact: The manual would contain specific safety ratings if available for the 2004 model year, which were generally good for its class at the time. Active Features ABS: Anti-lock Braking System (ABS) coverage included. Traction Control: If equipped, traction control system diagnostics would be covered. Passive Features Airbags: Restraint System coverage includes airbags (front, possibly side) and seatbelt systems. 💡 Technology Features Infotainment Audio System: Base models likely featured a basic AM/FM/CD player, with optional premium audio systems available on higher trims. Manual may cover basic diagnostics. Driver Assistance Cruise Control: Cruise control...