The 2004 Honda Odyssey represents the culmination of the second generation of Honda's highly regarded full-size minivan, known for its exceptional reliability, practicality, and family-friendly design. This model, chassis code RL1, features a robust 3.5L V6 SOHC VTEC engine producing approximately 240 horsepower, paired with a 5-speed automatic transmission. Its spacious interior offers flexible seating and ample cargo volume, making it an ideal choice for families and individuals requiring versatile transportation. The Odyssey has historically been praised for its comfortable ride, strong resale value, and engineering quality, often competing favorably against rivals like the Toyota Sienna and Nissan Quest. This comprehensive online service and repair manual provides detailed, factory-level information essential for maintaining and repairing the 2004 Honda Odyssey. It covers all major vehicle systems, including the engine, transmission, drivetrain, suspension, steering, brakes, electrical systems, and HVAC. Within its extensive digital pages, you will find step-by-step procedures for routine maintenance, diagnostics, component repair, and overhauls, along with crucial wiring diagrams and technical specifications. This manual is an indispensable resource for owners, mechanics, and technicians seeking to ensure the optimal performance, safety, and longevity of their vehicle. 🏷️ Basic Information Identification Make: Honda Model: Odyssey Year: 2004 Codes Chassis Code: RL1 Generation Generation Designation: Second Generation (2000-2004) 👋 Introduction Market Position Vehicle Segment: Full-size Minivan Target Audience: Families, individuals requiring spacious and versatile transportation. Competitive Analysis Key Competitors: Toyota Sienna, Nissan Quest, Ford Freestar/Windstar, Dodge Grand Caravan/Voyager. Key Features Manual Advantage: Officially licensed, OE (Original Equipment) derived information, digital convenience, comprehensive coverage. Vehicle Strengths: Reliability, practicality, flexible interior, comfortable ride, strong resale value. 📋 Manual Details Coverage Areas Primary Coverage: 2004 Honda Odyssey Related Years Covered: Likely covers minor variations for 2000-2003 models due to generational similarities, but primarily focused on 2004. Page Count Estimated Pages: Extensive (digital format, not limited by traditional page count, but equivalent to several thousand printed pages of information). Manual Type Type: Online Service and Repair Manual Software Language Language: English Format Format: Web-based access (compatible with PC, laptop, smartphone, tablet via web browser) Access Duration: 1 Year 📖 Manual Coverage Systems Covered Engine: Complete engine diagnostics, repair, overhaul, and maintenance for the 3.5L V6 engine. Transmission: Service and repair procedures for the automatic transmission (likely 5-speed automatic transmission). Drivetrain: Front-wheel drive (FWD) system, including axles, CV joints, and related components. Suspension: Detailed information on front and rear suspension systems, including struts, control arms, bushings, and alignment procedures. Steering: Power steering system, steering rack, tie rods, and related components. Brakes: Front and rear brake systems, including discs, pads, calipers, hydraulic lines, ABS, and VSA (Vehicle Stability Assist) components. Electrical: Comprehensive coverage of the vehicle's electrical system, including wiring diagrams, fuses, relays, charging system, starting system, lighting, and power accessories. HVAC: Heating, ventilation, and air conditioning (HVAC) system diagnosis and repair, including refrigerant handling and component replacement. Body: Body panel repair, door mechanisms, glass replacement, and interior trim removal/installation. Body Electronics: Power windows, power door locks, remote keyless entry, and interior/exterior lighting controls. Procedures Included Maintenance: Regular scheduled maintenance, fluid changes, filter replacements, inspections, and lubrication. Diagnostics: Troubleshooting common symptoms, diagnostic trouble codes (DTCs), and systematic diagnostic procedures. Repair: Detailed step-by-step repair instructions for all major vehicle systems and components. Overhaul: Complete engine and transmission overhaul procedures. Replacement: Component replacement guidance for wear items and failed parts. Adjustment: Alignment, brake adjustment, and other system adjustments. Wiring Diagrams: Comprehensive electrical wiring diagrams for all circuits. Technical Depth Depth: Factory-level detail, suitable for professional technicians and advanced DIY enthusiasts. 📊 Manual Specifications File Format Digital Format: Web-based access, searchable content. Print Quality Print Option: Digital content is viewable on screen; printing specific sections may be possible depending on the platform's features. Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Code: J35A1 (likely, for the 2004 model year) Engine Type: 3.5L V6 SOHC VTEC Performance Horsepower: Approximately 240 hp @ 5,500 rpm (varies slightly by trim and specific engine variant) Torque: Approximately 245 lb-ft @ 4,500 rpm (varies slightly by trim and specific engine variant) Fuel System Fuel Delivery: Multi-point Fuel Injection (PGM-FI) Fuel Type: Unleaded Gasoline (87 Octane Recommended) Cooling System Coolant Capacity: Approximately 6.8 US quarts (6.4 liters) Oil System Oil Capacity With Filter: Approximately 4.5 US quarts (4.3 liters) Recommended Oil Viscosity: SAE 5W-20 (API Certified) 🔧 Transmission Standard Transmission Type: 5-speed Automatic Transmission Optional Optional Transmission: N/A (Only Automatic Available) Features Transmission Features: Grade Logic Control, Sequential SportShift (on some trims). Fluid Specifications Transmission Fluid Type: Honda Genuine ATF DW-1 (or equivalent approved fluid, check manual for exact specification and potential older specs). Fluid Capacity Transmission Fluid Capacity: Approximately 3.0-3.4 US quarts (2.8-3.2 liters) for dry fill, lower for fluid change. 📐 Dimensions Exterior Length: Approximately 201.0 inches (5105 mm) Width: Approximately 77.0 inches (1956 mm)...