The Subaru XT and XT6, produced in 1990, represent a unique chapter in Subaru's automotive history, offering a distinctive blend of sporty coupe styling and capable all-wheel-drive performance. These models, with chassis codes AS/AT for the XT and AY for the XT6, were engineered with a focus on aerodynamic design and an aircraft-inspired cockpit. The XT featured a 1.8L EA82 four-cylinder engine, while the more performance-oriented XT6 boasted a potent 2.7L ER27 six-cylinder Boxer engine, both paired with either a 5-speed manual or a 4-speed automatic transmission. The XT6 also introduced the innovative 'Sportshift' feature on its automatic transmission. These vehicles competed in a segment that valued unique design and driving dynamics, setting them apart with their wedge-shaped profiles and advanced (for the era) all-wheel-drive systems.

This manual serves as a comprehensive guide for the service and repair of the 1990 Subaru XT and XT6. It covers essential maintenance procedures, detailed diagnostic and troubleshooting information, and in-depth technical specifications for all major vehicle systems. Areas addressed include the engine (both 1.8L EA82 and 2.7L ER27 Boxer variants), transmission (manual and automatic), drivetrain, brakes, suspension, steering, and electrical systems. Furthermore, the manual provides guidance on bodywork and HVAC service, offering factory-accurate procedures to assist owners, mechanics, and technicians in maintaining the longevity and optimal performance of these distinctive vehicles.