This manual covers the Subaru Impreza WRX and WRX STI models produced between 2008 and 2010. These performance-oriented vehicles are renowned for their turbocharged Boxer engines, Symmetrical All-Wheel Drive systems, and strong ties to rally racing heritage, earning them frequent recognition on lists like '10Best.' The WRX features a 2.5L EJ255 engine and a 5-speed manual transmission, while the WRX STI boasts a more powerful 2.5L EJ257 engine and a 6-speed manual transmission, complete with the Driver's Control Center Differential (DCCD). Engineered for enthusiasts, these models offer a unique blend of everyday usability and track-ready performance, built upon Subaru's reputation for reliability and engineering prowess.

This comprehensive Service Repair Manual is designed to assist owners, mechanics, and technicians in maintaining and repairing the 2008-2010 Subaru Impreza WRX and WRX STI. It provides in-depth coverage of all major systems, including the powertrain (engine, turbocharger, transmissions), drivetrain (differentials, DCCD), chassis (suspension, brakes, steering), and electrical systems (wiring diagrams, ECU, sensors). Detailed procedures for routine maintenance, component overhauls, and troubleshooting are included, along with technical specifications and diagnostic guidance for common issues. The manual is presented in English and is available in a searchable and printable format for convenient access and workshop use.