This manual series provides comprehensive coverage for Jaguar XJ6 and XJ12 models, likely spanning the Series III and XJ40 generations, and potentially early X300 variants. These vehicles, produced primarily in the 1980s and early 1990s, represented Jaguar's commitment to luxury, performance, and distinctive styling, competing with other high-end sedans of their era. Known for their potent inline-six and V12 engines, refined ride quality, and elegant design, the XJ series embodies a significant part of Jaguar's automotive heritage. This resource is essential for preserving these classic luxury vehicles, offering detailed insights into their unique engineering and components.

This service and repair manual is designed to be an exhaustive guide for maintaining and repairing your Jaguar XJ6 or XJ12. It covers a vast array of systems and procedures, including detailed engine overhaul and rebuilding for both inline-six and V12 configurations, fuel system diagnostics, ignition system servicing, cooling and lubrication systems, extensive electrical system coverage with wiring diagrams, brake system maintenance, suspension and steering, drivetrain components, climate control, and body and chassis work. The manual also includes troubleshooting guides, computer diagnostic trouble tree charts, and specific procedures for tasks such as timing belt replacement and air conditioning servicing, ensuring owners and technicians have the necessary information for all aspects of vehicle care.