The Mitsubishi Lancer Evolution IX, also known as the Evo 9, is a high-performance sports sedan produced from 2005 to 2008. Built upon the CT9A chassis, this model represents a significant evolution of its rally-bred lineage, directly influenced by World Rally Championship success. It is renowned for its advanced all-wheel-drive system, featuring the Active Center Differential (ACD) and Super Active Yaw Control (S-AYC) or Active Yaw Control (AYC), combined with a potent 2.0-liter turbocharged 4G63T MIVEC engine. This combination delivers exceptional driving dynamics, handling, and acceleration, making it a sought-after vehicle for enthusiasts seeking ultimate performance. The Evo IX was offered in all variants, including all engine and transmission types, with a 6-speed manual transmission being the standard and only option. This comprehensive workshop repair service manual provides detailed information for all Mitsubishi Lancer Evolution IX models from 2005 to 2008. Covering all engines, trim levels, and transmission types, the manual is written in English and designed for professional technicians and owners alike. It encompasses a wide array of essential topics, including engine and transmission service and repair, brake system maintenance, electrical systems with detailed wiring diagrams, suspension, steering, cooling, fuel, emission, HVAC, and chassis/body repairs. Furthermore, it includes general maintenance procedures, periodic lubrication schedules, troubleshooting guides, and in-depth diagnostic and repair procedures with detailed substeps. The manual also features hundreds of diagrams and illustrations, including enlarged insets for clarity, ensuring a thorough understanding of all maintenance and repair aspects.