1990 Mazda Miata Service and Repair Manual

This factory service and repair manual for the 1990 Mazda Miata covers a 2-door convertible in its Base trim, powered by a 1.6L inline-four with double overhead camshafts that runs on gasoline and is naturally aspirated. One engine, one body and one trim make up the year. Procedures, specifications and torque values for the four-cylinder, its fuel, ignition and cooling systems and the chassis come with wiring diagrams and diagnostics for the electrical system.

Engines covered

• 1.6L inline-four — DOHC, naturally aspirated, gasoline

Body styles covered

• 2-door convertible

Trims covered

• Base

Known issues on the 1990 Miata. NHTSA lists one recall for the 1990 Miata, covering certain cars fitted with a hardtop for which a hoist accessory kit had been sold. The kit's plastic strap-tension buckles could break once the hardtop hung from the hoist, which could drop the hardtop onto anyone beneath or near it, and Mazda replaced the hoists free of charge. Owners have lodged 28 complaints, with 6 each for the air bags, the power train and the seat belts; 4 reported a crash, 4 an injury and one a fire. Body procedures and electrical wiring diagrams in the manual relate to those areas.