This comprehensive service and repair manual is tailored specifically for the Subaru Impreza WRX (STI) models produced in 2003 and 2004. It encompasses all styles of these vehicles, providing you with a complete resource for understanding and maintaining your Subaru. The manual covers a wide range of topics, including detailed instructions for engine repair, transmission and drivetrain maintenance, electrical system troubleshooting, bodywork repair, and much more. Whether you're a seasoned mechanic or a DIY enthusiast, this manual equips you with the knowledge and step-by-step guidance necessary to perform a variety of repairs and service tasks on your Subaru Impreza WRX (STI). From routine maintenance to complex repairs, this manual serves as your trusted guide, ensuring your vehicle runs smoothly for years to come.

The Subaru Impreza WRX STI, a high-performance variant of the popular Impreza compact car, was a force to be reckoned with in the early 2000s. Introduced in 2003, the second-generation WRX STI continued to build upon the legacy of its predecessor, offering a potent blend of rally-inspired performance and everyday practicality. Under the hood resided a 2.5-liter turbocharged boxer four-cylinder engine capable of delivering a thrilling 300 horsepower and 300 lb-ft of torque, sending power to all four wheels through a six-speed manual transmission. The STI's handling was further enhanced by its sophisticated symmetrical all-wheel-drive system, featuring a viscous limited-slip center differential and a driver-selectable center differential lock, allowing for precise control and exceptional traction in a variety of conditions.

Beyond its impressive performance credentials, the 2003-2004 WRX STI was also known for its distinctive styling. Its aggressive front fascia with a large air intake, prominent hood scoop, and flared wheel arches hinted at the car's potent capabilities. Inside, the sporty theme continued, with Recaro bucket seats providing excellent support, a thick-rimmed steering wheel, and a simple but functional dashboard layout. This blend of performance, practicality, and distinctive styling made the Subaru Impreza WRX STI a highly sought-after vehicle among car enthusiasts, solidifying its reputation as a true icon of the performance car scene.