The 2008 Toyota Sienna is a full-size minivan renowned for its exceptional reliability, spacious interior, and comfortable ride, making it an ideal choice for families and individuals requiring versatile passenger and cargo transport. Built upon a strong reputation for quality and durability, this second-generation Sienna features a robust 3.5L 2GR-FE V6 engine paired with a 6-speed automatic transmission. Available in both Front-Wheel Drive (FWD) and All-Wheel Drive (AWD) configurations, the Sienna offers a well-engineered package with a strong emphasis on safety, boasting 5-star NHTSA ratings in front and side impacts. Its practical design includes flexible seating arrangements and significant cargo volume, further solidifying its position as a leading competitor in the minivan segment. This comprehensive service and repair manual software provides in-depth technical information for the 2008 Toyota Sienna. It covers all essential systems, including the 3.5L V6 engine, 6-speed automatic transmission, drivetrain, suspension, steering, brakes, electrical systems, and HVAC. Detailed maintenance procedures, from routine oil changes to spark plug and coolant replacement, are clearly outlined, along with extensive repair procedures for major component overhauls and diagnostics. The manual also includes troubleshooting guides, diagnostic trouble code interpretation, and critical technical specifications such as torque values and fluid capacities. This resource is designed to assist owners, mechanics, and technicians in effectively maintaining, diagnosing, and repairing the vehicle to factory standards. 🏷️ Basic Information Identification Make: Toyota Model: Sienna Year: 2008 Codes Chassis Code: XL30 👋 Introduction Market Position Vehicle Segment: Full-size Minivan Target Audience: Families, individuals seeking versatile cargo and passenger transport Competitive Analysis Key Competitors: Honda Odyssey, Chrysler Pacifica/Town & Country, Dodge Grand Caravan, Kia Sedona, Ford Freestar (discontinued) Key Features Vehicle Strengths: Toyota's reputation for reliability, comfortable ride, spacious interior, versatile seating configurations, optional AWD, strong V6 engine. Manual Advantage: Licensed, factory-derived information, comprehensive coverage, digital format for easy access and searchability, cost-effective compared to traditional printed manuals. 📋 Manual Details Coverage Areas Engine Coverage: 3.5L 2GR-FE V6 Transmission Coverage: 6-speed Automatic Transmission (U660E) Drivetrain Coverage: Front-Wheel Drive (FWD) and All-Wheel Drive (AWD) Page Count Estimated Page Count: Extensive (typically 2000+ pages for complete factory service manuals) Manual Type Type: Service and Repair Manual Software Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Engine Systems: Engine mechanical, lubrication, cooling, fuel, ignition, exhaust, emissions control, engine management (ECM/PCM) Transmission Systems: Automatic transmission operation, diagnosis, repair, torque converter, internal components, transmission control Drivetrain Systems: Front axle, rear axle (AWD), driveshafts, CV joints, differentials Suspension Systems: Front suspension (struts, control arms, ball joints), rear suspension (multi-link), springs, shock absorbers, stabilizers Steering Systems: Power steering system, steering rack, tie rods, steering column, alignment specifications Brake Systems: Front and rear brakes (disc), ABS, EBD, brake fluid, hydraulic system, parking brake Electrical Systems: Battery, charging system, starting system, lighting, instruments, gauges, horn, wipers, power accessories, fuse box layouts HVAC Systems: Heating, ventilation, air conditioning (A/C) system components, refrigerant, diagnosis, repair Body And Interior: Body panels, doors, glass, seats, trim, interior components, body repair, corrosion protection Wiring Diagrams: Comprehensive electrical wiring diagrams for all systems Procedures Included Maintenance Procedures: Oil and filter change, air filter replacement, spark plug replacement, coolant flush, brake fluid flush, transmission fluid change Repair Procedures: Engine component replacement (e.g., water pump, alternator), transmission overhaul, brake caliper replacement, suspension component replacement, electrical component diagnosis and replacement Diagnostic Procedures: Troubleshooting guides, symptom-based diagnostics, DTC (Diagnostic Trouble Code) lookup and interpretation, scan tool usage Installation Procedures: Component installation (e.g., brake pads, suspension parts), accessory installation (limited) Specifications And Data: Torque specifications for all fasteners, fluid capacities and types, electrical specifications, alignment settings Technical Depth Depth: Comprehensive: Covers routine maintenance to major component overhauls and diagnostics. Factory-level detail. 📊 Manual Specifications File Format Format Details: PDF. Searchable text with high-resolution diagrams and illustrations. Print Quality Quality: High-resolution, suitable for printing individual pages or sections. Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Code: 2GR-FE Engine Type: V6, DOHC, 24-valve, VVT-i (Variable Valve Timing with intelligence) Displacement: 3.5 Liters (3456 cc) Bore X Stroke: 94.0 mm x 83.0 mm Compression Ratio: 10.0:1 Performance Horsepower: 265 hp @ 6200 rpm Torque: 245 lb-ft @ 4700 rpm Fuel System Fuel Delivery: Electronic Fuel Injection (EFI), Sequential Multiport Fuel Injection (SFI) Recommended Fuel: 87 Octane Unleaded Gasoline Fluid Specs Engine Oil Type: SAE 0W-20 Synthetic Motor Oil Engine Oil Capacity: 6.4 US Quarts (6.1 Liters) with filter change Coolant Type: Toyota Super Long Life Coolant (SLLC) or equivalent (Pink) Coolant Capacity: Approx. 9.5 US Quarts (9.0 Liters) 🔧 Transmission Standard Type: 6-Speed Automatic Transmission Code: U660E Features Drive Modes: Driver-selectable modes (e.g., Snow mode) may be available depending on trim. Fluid Specs Transmission Fluid Type: Toyota Genuine ATF WS (World Standard) Transmission Fluid Capacity: Approx. 4.5 US Quarts (4.3 Liters) for drain and fill; 8.0...