The 1990 Mazda Miata has 3 recalls, the most serious involving the optional hardtop hoist accessory kit, where a plastic buckle can break while the hardtop is suspended in a garage, dropping it and potentially injuring anyone nearby.
The remaining two recalls are compliance-related. On the lighting side, when the turn signal is activated, both daytime running lights shut off entirely rather than one dimming as required, which reduces the car's visibility to other drivers during a lane change or turn. On the emissions side, the catalytic converter can fail due to vibration, which affects exhaust emissions compliance and, over time, reduces the converter's ability to filter exhaust gases properly.