This comprehensive Jeep Grand Cherokee WJ 2003 Repair Service Manual provides in-depth technical information for professional technicians. It offers a detailed guide to servicing and repairing your vehicle, covering everything from basic maintenance to complex engine and transmission work. The manual includes detailed instructions, diagrams, and specifications for all major components, including: * Engine and Drivetrain: Explore the intricacies of the engine, transmission, drivetrain, and related systems. This section includes troubleshooting guides, repair procedures, and component specifications. * Electrical Systems: Delve into the intricacies of your vehicle's electrical system, gaining insights into wiring diagrams, component identification, and repair procedures. Understand the workings of the electrical system, from basic circuits to advanced diagnostics. * Body and Chassis: Gain a thorough understanding of your Grand Cherokee's body and chassis, encompassing details on suspension, steering, brakes, and other key components. The manual provides detailed descriptions, diagrams, and repair methodologies for each system. * Interior and Comfort Features: Discover the inner workings of your Grand Cherokee's interior, gaining knowledge about its climate control, seating, lighting, and other comfort-enhancing features. The manual includes repair instructions, troubleshooting guides, and component specifications for these systems. This manual serves as a valuable resource for both seasoned mechanics and DIY enthusiasts seeking comprehensive insights into their Jeep Grand Cherokee WJ 2003. It is designed to empower you with the knowledge and guidance you need to confidently perform repairs and maintenance.

The Jeep Grand Cherokee WJ, produced from 1999 to 2004, represents the second generation of the popular SUV. This iteration built upon the success of its predecessor by offering a more refined and capable driving experience. The WJ, known for its distinctive boxy design and rugged off-road capabilities, came equipped with a range of powertrains, including the 4.0L inline-six engine, the 4.7L V8, and the 5.9L V8. Notable features included a fully independent suspension, an advanced four-wheel-drive system with a low range transfer case, and a spacious interior with seating for up to five passengers. The Jeep Grand Cherokee WJ, while reliable and capable, also had its share of common issues. These included issues with the transmission, particularly the 42RE and 45RFE units, which were known for potential slipping or failure. The engine, while robust, could experience problems with the valve lifters, head gaskets, and cooling system components. The electrical system also presented challenges, with known issues in the ignition system and various sensors. The Jeep Grand Cherokee WJ, despite its shortcomings, remains a popular choice for off-road enthusiasts and those seeking a capable and comfortable SUV. Its iconic design, robust construction, and versatile capabilities have earned it a lasting legacy in the automotive world. However, its age and potential maintenance needs require careful consideration before purchasing a WJ, particularly if seeking a vehicle with minimal repair costs.