The Subaru Impreza WRX STI, produced in 2008, represents a pinnacle of performance compact automotive engineering, built upon Subaru's rich rally heritage. This model, available in hatchback and sedan body styles on the GR/GV chassis, features the potent EJ257 engine, a 2.5-liter turbocharged Boxer unit, paired with a robust 6-speed manual transmission. Its design emphasizes driver engagement through Symmetrical All-Wheel Drive with a Driver Controlled Center Differential (DCCD) and the Subaru Intelligent Drive (SI-DRIVE) system. Known for its exceptional handling, responsive powertrain, and driver-centric cockpit, the WRX STI is engineered for enthusiasts seeking exhilarating performance on both road and track.

This comprehensive Factory Service Manual provides detailed guidance for the maintenance, repair, and diagnostics of the 2008 Subaru Impreza WRX STI. Covering all major systems including the engine, transmission, chassis, body, and electrical systems, this manual is an essential resource for owners and professional technicians. It includes step-by-step repair procedures, troubleshooting guides, diagnostic flowcharts, technical specifications, and wiring diagrams. The manual's extensive scope ensures that all aspects of the vehicle, from routine maintenance like oil changes and filter replacements to complex engine rebuilds and electrical system diagnostics, are thoroughly addressed, facilitating optimal vehicle performance and longevity.

The Subaru Impreza WRX STI, produced in 2008, represents a pinnacle of performance compact automotive engineering, built upon Subaru's rich rally heritage. This model, available in hatchback and sedan body styles on the GR/GV chassis, features the potent EJ257 engine, a 2.5-liter turbocharged Boxer unit, paired with a robust 6-speed manual transmission. Its design emphasizes driver engagement through Symmetrical All-Wheel Drive with a Driver Controlled Center Differential (DCCD) and the Subaru Intelligent Drive (SI-DRIVE) system. Known for its exceptional handling, responsive powertrain, and driver-centric cockpit, the WRX STI is engineered for enthusiasts seeking exhilarating performance on both road and track.

This comprehensive Factory Service Manual provides detailed guidance for the maintenance, repair, and diagnostics of the 2008 Subaru Impreza WRX STI. Covering all major systems including the engine, transmission, chassis, body, and electrical systems, this manual is an essential resource for owners and professional technicians. It includes step-by-step repair procedures, troubleshooting guides, diagnostic flowcharts, technical specifications, and wiring diagrams. The manual's extensive scope ensures that all aspects of the vehicle, from routine maintenance like oil changes and filter replacements to complex engine rebuilds and electrical system diagnostics, are thoroughly addressed, facilitating optimal vehicle performance and longevity.