The 1978 Mazda RX-4 is a distinctive vehicle, available as a Coupe, Sedan, and Wagon, and powered by the innovative 12A Wankel rotary engine. This model represents Mazda's pioneering spirit in rotary technology, offering a unique driving experience and a compact, efficient engine design for its time. Known for its sporty handling and distinctive engine note, the RX-4 was a significant offering in Mazda's lineup, showcasing their commitment to alternative engine designs and appealing to enthusiasts seeking something beyond conventional piston-powered vehicles. Its engineering quality and reliability were hallmarks of Mazda's automotive production during this era.

This comprehensive factory service manual provides all necessary information for the maintenance, diagnosis, and repair of the 1978 Mazda RX-4. It covers every aspect of the vehicle, from the intricacies of the rotary engine, including its unique lubrication and apex seal requirements, to the transmission, chassis, and electrical systems. Detailed procedures, troubleshooting guides, and essential technical specifications are included to assist professional technicians and dedicated enthusiasts in keeping their RX-4 in optimal condition. The manual's extensive scope ensures that all maintenance and repair tasks, from routine service to major overhauls, can be performed accurately and efficiently.