The Jaguar XK, model code X100, represents a pinnacle of luxury grand touring, offered in 2003 as both a Coupe and Convertible. This model, available as the XK8 or the more potent XKR, embodies Jaguar's legacy of sophisticated styling and refined performance. Powered by a 4.2-liter V8 engine, either naturally aspirated or supercharged, the XK delivers a compelling blend of power and elegance, designed to provide a distinguished driving experience. Its engineering quality and reliability are hallmarks of Jaguar's commitment to creating vehicles that are both exhilarating and comfortable for long journeys.

This manual serves as a comprehensive Quick Reference Diagnostic Guide and Technical Service Bulletin Supplement, focusing on the Powertrain Diagnostic Trouble Codes (DTCs) and European On-Board Diagnostics (EOBD) standards relevant to the 2003 Jaguar XK. It provides essential information for owners, independent repair shops, and technicians, covering engine management, emissions control, and drivetrain diagnostics. The guide details systematic troubleshooting procedures, DTC lookup, component identification, and general repair guidance, ensuring that the vehicle's complex systems are maintained and repaired effectively, preserving its performance and longevity.