This comprehensive service and repair manual provides detailed instructions for maintaining and repairing your 2004-2005 Subaru Impreza WRX and WRX STI. It covers a wide range of topics, including engine, brakes, intercooler, turbo, exhaust, 5-6 speed transmission, center differential, rear differential, DCCD, suspension, steering, and wiring. Whether you're a seasoned mechanic or a DIY enthusiast, this manual will empower you to tackle a vast array of maintenance and repair tasks with confidence.

The Subaru Impreza WRX and WRX STI models produced between 2004 and 2005 represent a significant evolution in the renowned rally-bred performance lineage. Building upon the success of their predecessors, these iterations refined the driving experience with a combination of enhanced power, improved handling, and refined aesthetics. The WRX, powered by a 2.5-liter turbocharged boxer engine, delivered a potent 227 horsepower and 221 lb-ft of torque, channeling its power through a 5-speed manual transmission and symmetrical all-wheel drive system. The STI variant, the pinnacle of performance, boasted a 2.5-liter turbocharged engine pushing out an impressive 300 horsepower and 300 lb-ft of torque, paired with a 6-speed manual transmission and a comprehensive suite of performance upgrades.

Beyond the mechanical enhancements, these Impreza models received a subtle yet impactful facelift. The front fascia was redesigned with a more aggressive grille and bumper, while revised headlights and taillights added a touch of contemporary flair. Inside, the cabin received improved materials and a more driver-focused layout, emphasizing comfort and control. The WRX and WRX STI models of this era solidified their reputation as formidable performance cars, offering drivers a thrilling experience with exceptional handling, balanced performance, and a distinct Subaru character. Their enduring legacy continues to inspire enthusiasts and drivers alike, marking a pivotal point in the evolution of the Impreza lineage.