The Mazda RX-3, produced from 1971 to 1978, represents a significant chapter in Mazda's automotive history, solidifying its reputation for innovative rotary engine technology. This compact sports coupe, sedan, and less common wagon variant offered a compelling blend of sporty styling, lightweight construction, and driver-focused handling, powered by the unique Mazda Rotary (Wankel) engine, available in 1.16 L (12A) and 1.30 L (13B) displacements. Its key selling points included its distinctive rotary powerplant, agile chassis, and the historical significance of establishing Mazda as a performance-oriented manufacturer. The RX-3's appeal continues to resonate with enthusiasts and restoration specialists who appreciate its unique engineering and spirited performance.

This comprehensive Workshop Service Manual (WSM) provides in-depth guidance for the maintenance, repair, and technical understanding of the Mazda RX-3. Covering essential systems such as the rotary powertrain (12A and 13B engines), manual transmissions, chassis, suspension, and electrical systems, this manual details scheduled maintenance, component replacement, and diagnostic procedures. It includes extensive information on engine and transmission rebuild specifications, troubleshooting guides for common issues like apex seal wear and carburetor problems, and electrical system diagnostics. The manual is designed to assist owners, mechanics, and technicians in effectively maintaining and restoring their RX-3, ensuring its longevity and optimal performance.