This manual covers the Subaru Impreza WRX and WRX STI models from the 2008 and 2009 model years. These vehicles are celebrated as high-performance compact sports sedans and hatchbacks, distinguished by their Symmetrical All-Wheel Drive system, potent turbocharged Boxer engines, and a heritage deeply rooted in rally racing. The WRX models feature a 2.5L turbocharged EJ255 engine producing 265 horsepower and 244 lb-ft of torque, paired with a 5-speed manual transmission. The more performance-oriented WRX STI models are equipped with a stronger 2.5L turbocharged EJ257 engine delivering 305 horsepower and 290 lb-ft of torque, a 6-speed manual transmission, and the advanced Driver Controlled Center Differential (DCCD) for enhanced torque distribution control.

This comprehensive Service Repair Manual provides detailed guidance for the maintenance, diagnosis, and repair of your Subaru Impreza WRX/STI. It encompasses all essential systems, including the engine, drivetrain, transmission, suspension, steering, brakes, HVAC, and electrical systems. The manual offers step-by-step procedures for routine maintenance, scheduled services, component removal and installation, troubleshooting common issues, and performing in-depth diagnostics. With its detailed specifications, wiring diagrams, and technical insights, this resource is an invaluable tool for owners, technicians, and mechanics seeking to preserve the performance and reliability of their 2008-2009 Subaru Impreza WRX or WRX STI.

This manual covers the Subaru Impreza WRX and WRX STI models from the 2008 and 2009 model years. These vehicles are celebrated as high-performance compact sports sedans and hatchbacks, distinguished by their Symmetrical All-Wheel Drive system, potent turbocharged Boxer engines, and a heritage deeply rooted in rally racing. The WRX models feature a 2.5L turbocharged EJ255 engine producing 265 horsepower and 244 lb-ft of torque, paired with a 5-speed manual transmission. The more performance-oriented WRX STI models are equipped with a stronger 2.5L turbocharged EJ257 engine delivering 305 horsepower and 290 lb-ft of torque, a 6-speed manual transmission, and the advanced Driver Controlled Center Differential (DCCD) for enhanced torque distribution control.

This comprehensive Service Repair Manual provides detailed guidance for the maintenance, diagnosis, and repair of your Subaru Impreza WRX/STI. It encompasses all essential systems, including the engine, drivetrain, transmission, suspension, steering, brakes, HVAC, and electrical systems. The manual offers step-by-step procedures for routine maintenance, scheduled services, component removal and installation, troubleshooting common issues, and performing in-depth diagnostics. With its detailed specifications, wiring diagrams, and technical insights, this resource is an invaluable tool for owners, technicians, and mechanics seeking to preserve the performance and reliability of their 2008-2009 Subaru Impreza WRX or WRX STI.