This comprehensive Subaru Impreza WRX STI Service & Repair Manual covers all aspects of maintaining and repairing your 2003-2004 model, whether equipped with a 5- or 6-speed manual or automatic transmission. It is designed for both professional mechanics and DIY enthusiasts, offering detailed instructions and specifications for every repair and service procedure. From basic maintenance like oil changes and brake pad replacements to more complex engine rebuilds and electrical system troubleshooting, this manual provides the essential information you need to keep your WRX STI running smoothly. It includes detailed diagrams, illustrations, and step-by-step instructions to ensure clarity and accuracy. The manual also contains troubleshooting guides, wiring diagrams, and technical specifications, allowing you to diagnose and resolve any issues effectively.

The Subaru Impreza WRX STI, produced from 2003 to 2004, is a high-performance variant of the popular Impreza compact car. It is a true icon of the rally-bred performance car scene, boasting a legendary engine, aggressive styling, and a driver-focused experience. Under the hood lies a 2.5-liter turbocharged Boxer engine, capable of producing 300 horsepower and 300 lb-ft of torque, channeled through either a 5-speed manual or a 6-speed automatic transmission. This power delivery, combined with a sophisticated all-wheel-drive system and a rigid chassis, allows the WRX STI to deliver exhilarating performance on both the road and the track. Its aggressive styling, featuring a prominent front bumper with a large air intake, a rear wing for downforce, and iconic STI badging, leaves no doubt about its performance intentions. Inside the WRX STI, the focus is on the driver, with supportive sport seats, a sporty steering wheel, and a clear instrument panel. The manual transmission, renowned for its precise and engaging feel, adds to the driver-focused experience. The WRX STI was offered with various options, including a sunroof, premium sound system, and advanced safety features, ensuring a comfortable and enjoyable driving experience. The Subaru Impreza WRX STI from 2003-2004 is a true performance car, offering a compelling blend of power, handling, and style. Its legacy continues to inspire enthusiasts, making it a highly sought-after car for both collectors and performance driving enthusiasts.