🏷️ Basic Information Identification Make: Toyota Model: Sienna Model Years Covered: 2004, 2005, 2006, 2007, 2008 Generation Code: XV20 (1998-2003) transition to XV30 (2004-2006) and XV40 (2007-2010) for later years within this range, implying coverage of early XV40 models. Codes Chassis Codes: XV30 (2004-2006), XV40 (2007-2008) 👋 Introduction Market Position Target Audience: Do-it-yourself enthusiasts and experienced mechanics. Value Proposition: Inexpensive way to keep your vehicle working properly, enabling DIY repairs and significant cost savings. Key Features Detail Level: Detailed illustrations, diagrams, wiring schematics, and specifications; step-by-step instructions based on complete disassembly. Illustration Count: Hundreds of photos and illustrations. 📋 Manual Details Coverage Areas Comprehensive Coverage: All models and all engines within the specified production years. Page Count Total Pages: 3000+ Manual Type Manual Classification: Complete Service Repair Manual Language Language: English Format Digital Format: PDF Compatibility: Windows, Mac, Linux, iOS (iPhone, iPad), Android 📖 Manual Coverage Systems Covered Powertrain: Engine overhaul and rebuilding, timing belt replacement, engine performance, firing orders, serpentine belt routings, timing belt service procedures, transmission removal and installation, transmission in-car servicing. Brakes And Suspension: Brakes, front end and alignment procedures and specifications, suspension, U-joint and CV-joint service procedures, brake servicing procedures. Electrical And Diagnostics: Wiring diagrams, trouble codes, troubleshooting and diagnostics, computer diagnostic trouble tree charts, computer diagnostic codes. Comfort And Body: Sunroof, air conditioning service and capacities. Procedures Included Maintenance: Factory maintenance schedules and charts, driving concerns. Repair And Rebuild: Every detail on repair, maintain, rebuild, refurbish, or restore; step-by-step instructions based on complete disassembly, detailed illustrations, diagrams. Technical Depth Diagnostic Scope: Advanced diagnostics, including computer diagnostic trouble trees and specific trouble codes. Repair Scope: From basic maintenance to complete engine and transmission overhauls, including component-specific servicing. 📊 Manual Specifications File Format Digital Delivery: Instant Download File Features: Bookmarked and searchable text for quick navigation. Storage Options: Save to hard drive, burn to CD-ROM. Viewing Capabilities: Zoomable, printable pages. Print Quality Page Completeness: 100% complete and intact, no missing/corrupt pages/sections. Binding Type Digital Binding: N/A (Digital Format) Paper Type Digital Paper Type: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: V6, 3.3L (3300cc) or 3.5L (3500cc) DOHC VVT-i (Variable Valve Timing with intelligence), depending on specific model year and trim. Engine Code Examples: 3MZ-FE (3.3L), 2GR-FE (3.5L - introduced in later years within the range) Performance Horsepower Range: Approximately 182-215 hp (varies by engine and year) Torque Range: Approximately 215-230 lb-ft (varies by engine and year) Fuel System Fuel Delivery: Electronic Fuel Injection (EFI) with Sequential Port Injection. Maintenance Timing Belt Material: Timing Belt (typically rubber composite) Serpentine Belt Routing: Detailed diagrams provided in the manual. 🔧 Transmission Standard Transmission Type: Automatic Transmission Transmission Gears: Typically 4-speed or 5-speed automatic (e.g., U151F for 4-speed, U250E for 5-speed) Optional Drivetrain Options: Front-Wheel Drive (FWD) and All-Wheel Drive (AWD) available on select models. Features Transmission Service: In-car servicing procedures covered. 📐 Dimensions Exterior Body Styles: Minivan Wheelbase Range: Approximately 119.3 inches (XV30) to 120.5 inches (XV40). Weights Curb Weight Range: Approximately 4,000 - 4,400 lbs (varies by configuration). 🛡️ Safety Features Ratings NHTSA Ratings General: Generally received good ratings from NHTSA for this period, though specific year ratings should be verified. Active Features Braking Systems: Anti-lock Braking System (ABS) standard, Electronic Brake-force Distribution (EBD), Brake Assist (BA). Passive Features Airbags: Front airbags, side curtain airbags, available front-seat mounted side airbags. 💡 Technology Features Infotainment Entertainment Systems: Available premium audio systems, CD players, rear-seat entertainment systems (DVD players). Driver Assistance Cruise Control: Standard cruise control, some models may offer adaptive cruise control on later iterations within the range. Connectivity Navigation: Optional factory navigation system. 🔧 Maintenance Service Intervals Oil Change Interval: Typically 5,000 to 7,500 miles or 6 months, using synthetic or synthetic blend oil, as specified in the manual. Timing Belt Replacement Interval: Recommended replacement around 90,000 miles or 7 years for most engines, check specific engine for exact interval. Fluid Specifications Engine Oil Type: SAE 5W-30 Synthetic or Synthetic Blend recommended, specific API service classification required (e.g., API SN). Transmission Fluid Type: Toyota Genuine ATF WS (World Standard) or equivalent Dexron III/VI compatible fluid, verify specific transmission requirement. Coolant Type: Toyota Super Long Life Coolant (SLLC) - Pink color. Known Issues Common Problems: Potential for sliding door actuator issues, catalytic converter failure (especially on older models), minor electrical gremlins, potential for oil leaks from valve covers or oil pan, brake wear. Diagnostic Challenges: The manual's diagnostic flowcharts are crucial for pinpointing issues with the complex electronic systems. 📚 Vehicle History Brand Heritage Toyota Legacy: Toyota's reputation for reliability, quality, and value. Model Evolution Sienna Development: The 2004 model year marked a significant redesign, moving from the XV20 to the XV30 platform. The 2007 model year introduced a further refresh and transition to the XV40 platform, bringing updated styling, powertrains, and features. Production Manufacturing Location: Princeton,...