This comprehensive Toyota Sienna Service Repair Manual covers model years 2004 through 2008, providing in-depth information for all models and engines. It is your ultimate resource for maintaining, repairing, rebuilding, refurbishing, or restoring your Sienna. The manual includes detailed instructions and illustrations for every aspect of your vehicle, from basic maintenance to complex repairs. It features detailed wiring diagrams, troubleshooting guides, and diagnostic charts to help you identify and resolve any issues. Inside, you'll find sections dedicated to: * **Engine Overhaul and Rebuilding:** This section provides detailed instructions for complete engine disassembly, rebuilding, and reassembly. * **Brakes:** Learn how to service, repair, and replace all brake components, including calipers, rotors, pads, and lines. * **Sunroof:** Find instructions for troubleshooting and repairing sunroof malfunctions. * **Timing Belt Replacement:** Step-by-step instructions for safely replacing the timing belt, a critical component for engine performance. * **Trouble Codes:** A comprehensive list of diagnostic trouble codes and their meanings, aiding in identifying potential problems. * **Wiring Diagrams:** Detailed diagrams illustrating the electrical system of your Sienna, making it easier to trace electrical faults. * **Troubleshooting and Diagnostics:** Comprehensive guides for diagnosing and resolving a wide range of vehicle problems. * **Computer Diagnostic Trouble Tree Charts:** A visual guide to help you pinpoint the root cause of electrical and computer-related issues. * **Engine Performance:** Learn how to diagnose and troubleshoot performance problems related to fuel, ignition, and emissions systems. * **Front End and Alignment Procedures and Specifications:** Detailed instructions and specifications for aligning your Sienna's front suspension for optimal handling and tire wear. * **Suspension:** Coverage of suspension components, including struts, shocks, springs, and control arms, with repair and replacement procedures. * **Transmission Removal and Installation:** Step-by-step instructions for removing and reinstalling the transmission, including torque specifications and safety precautions. * **Air Conditioning Service and Capacities:** Learn about refrigerant charging, component replacement, and other air conditioning maintenance procedures. * **Transmission in Car Servicing:** Procedures for servicing the transmission without removal, saving time and effort. * **Computer Diagnostic Codes:** An extensive list of diagnostic codes and their meanings for the Sienna's computer systems. * **Firing Orders:** Information on the proper firing order for your Sienna's engine. * **Detailed Specifications:** Comprehensive specifications for all models covered, including engine, transmission, and suspension details. * **Factory Maintenance Schedules and Charts:** OEM-recommended maintenance schedules for your Sienna, helping you stay on track with routine maintenance. * **Serpentine Belt Routings with Diagrams:** Instructions and diagrams for inspecting, replacing, and routing the serpentine belt. * **Timing Belt Service Procedures:** Detailed instructions for servicing and replacing the timing belt, a vital component for engine timing. * **Brake Servicing Procedures:** A complete guide to brake maintenance, including bleeding the system and adjusting brake components. * **Driving Concerns:** Troubleshooting tips for resolving common driving issues, such as strange noises, vibrations, or handling problems. * **Complete Torque Specifications:** Accurate torque specifications for all bolts and nuts on your Sienna, ensuring proper tightening and preventing damage. * **U-Joint and CV-Joint Service Procedures:** Instructions for inspecting, replacing, and greasing U-joints and CV joints. * **Repair Procedures:** Step-by-step instructions for repairing a wide range of vehicle components, from engine parts to body panels. * **Complete Wiring Diagrams:** Detailed diagrams for all electrical systems, making it easy to trace circuits and troubleshoot electrical faults. * **Hundreds of Illustrations:** Clear and concise illustrations guide you through every repair procedure. * **Vacuum Diagrams:** Visual representations of the vacuum system, helping you understand and diagnose vacuum-related issues. This comprehensive manual provides everything you need to keep your Toyota Sienna running smoothly and efficiently, saving you time and money on professional repairs.

The Toyota Sienna Service Repair Manual 2004-2008 is a comprehensive guide designed to aid mechanics and automotive enthusiasts in servicing and repairing the Toyota Sienna minivan, specifically models produced from 2004 through 2008. This manual provides a wealth of information on various aspects of the Sienna, including its engine, transmission, suspension, electrical systems, and bodywork. It features detailed diagrams, illustrations, and step-by-step instructions, making it an invaluable resource for diagnosing and resolving any mechanical issues. The manual covers a wide range of topics, from routine maintenance procedures like oil changes and tire rotations to advanced repairs involving engine rebuilds or transmission overhauls. The Toyota Sienna Service Repair Manual 2004-2008 is essential for anyone who wants to perform their own maintenance or repairs on their Sienna. It provides the necessary information to understand the vehicle's systems, locate specific components, and carry out repairs safely and efficiently. The manual also includes troubleshooting guides, electrical wiring diagrams, and specifications, making it a complete resource for diagnosing and resolving any problems. Whether you are a professional mechanic or a DIY enthusiast, this manual is an indispensable tool for keeping your Toyota Sienna running smoothly and reliably.