The Mitsubishi Diamante, also known as the Sigma in the Japanese market, represents a significant entry into the premium sedan segment during its production years of 1991 through 1995. Engineered with a focus on comfort, performance, and advanced features for its era, this front-wheel-drive vehicle was powered by robust V6 engines, typically the 3.0L 6G72. Its positioning against established luxury marques highlighted Mitsubishi's commitment to delivering a refined driving experience, spacious interior, and a notable array of technologies, including multi-link suspension and electronically controlled transmissions.

This comprehensive Factory Service Manual provides extensive guidance for the maintenance, diagnosis, and repair of the Mitsubishi Diamante and Sigma models. It covers all major vehicle systems, from engine mechanical and electrical components to the transmission, suspension, braking, and body systems. Detailed procedures for routine maintenance, complex overhauls, component replacement, and troubleshooting are included, along with essential technical specifications and wiring diagrams. This manual serves as an indispensable resource for owners, technicians, and mechanics seeking to preserve the integrity and performance of their vehicle.