1975: Introduced with a 2.8-liter inline-six engine and Bosch L-Jetronic fuel injection, offering improved power and emissions compliance; federally mandated safety bumpers were added.
1976: Minor interior updates included revised trim materials and optional factory air conditioning; improvements to emissions control systems were made.
1977: A new 5-speed manual transmission became available as an option alongside the 4-speed manual and 3-speed automatic; additional sound insulation was added for comfort.
1978: Final year of production featured limited-edition "Zap Z" models with unique graphics and color schemes; minor refinements were made before transitioning to the 280ZX.