By 1990, this generation of Ford's popular rear-drive ponycar was more than a decade old, having been introduced for 1979. Mustangs came in coupe and convertible form, accompanied by a 2-door hatchback coupe. All three body styles were available in LX trim with a standard 2.3-liter 4-cylinder engine or optional V8 (dubbed LX 5.0L). The high-performance GT was limited to hatchback and convertible bodies and included the V8 engine. A driver-side airbag arrived for 1990, along with rear shoulder belts.