This manual covers the Lancer Evolution IX, also known as the Evo 9, produced from 2005 to 2007. This performance sedan, a direct descendant of World Rally Championship (WRC) machines, is renowned for its iconic 4G63 MIVEC turbocharged engine and advanced All-Wheel Drive (AWD) system featuring Active Center Differential (ACD) and Super Active Yaw Control (S-AYC). Engineered for exceptional handling, grip, and power delivery, the Evo 9 is a rally homologation special that offers a direct connection to motorsport heritage. Its robust engineering quality and performance focus have made it a sought-after vehicle for enthusiasts and those who appreciate its rally-bred capabilities.

This comprehensive workshop service and repair manual is designed to provide expert-level guidance for the maintenance, diagnosis, and repair of the Lancer Evolution IX (CT9A chassis code). It covers all major vehicle systems in detail, including engine mechanical and management, transmission, drivetrain, suspension, brakes, steering, electrical systems, body, chassis, HVAC, and safety systems. The manual includes detailed procedures for scheduled maintenance, component replacement, repair, and rebuilds, along with comprehensive wiring diagrams and troubleshooting guides. This resource is invaluable for professional technicians and advanced DIY enthusiasts aiming to maintain or restore the performance and reliability of their Evo 9.