The Mazda RX3, produced between 1970 and 1978, represents a significant chapter in automotive history, particularly for its pioneering use of rotary engine technology. Available in coupe, sedan, and station wagon body styles, this compact sports car offered a unique blend of sporty performance and affordable driving dynamics, often competing with established rivals from Datsun and Toyota. Its distinctive rotary (Wankel) engine, with a displacement of 1146 cc and producing approximately 90-110 horsepower, provided a uniquely smooth operation and a compelling alternative to conventional piston engines. The RX3’s engineering quality and reliability, especially when properly maintained, have cemented its status as an enthusiast vehicle and a key model in Mazda's performance heritage.

This workshop service repair manual provides comprehensive guidance for the maintenance, repair, and diagnosis of Mazda RX3 models from 1970 through 1978. It covers all essential systems, including the rotary engine's intricate components, transmissions (manual and automatic), suspension, steering, braking, and electrical systems. Detailed procedures for routine maintenance, component overhaul, troubleshooting, and diagnostic steps are included, along with critical technical specifications and wiring diagrams. This manual is an indispensable resource for DIY mechanics, professional technicians, and Mazda enthusiasts seeking to preserve and optimize their RX3's performance and longevity.