One turbo just wasn’t enough as carmakers pushed for sequential twin turbochargers to reduce lag and tame the violence of a single large turbo

Streamlined On-Board Diagnostics (OBD) simplified the repair process for all manufacturers

Everything was POWER operated – power seats, windows, doors, and mirrors

Audio systems are now “premium” – surround sound, 6 disc CD player, amps and subs

Overhead cam V8’s and compact V6 engines began to phase out the inline six

Bumpers transition from rubber to body-colored plastic, and car makers struggled to color match them to the metal body

More curvature in the body lines thanks to new manufacturing and CAD design breakthroughs. Supercars and hypercars were experimenting with never-before-seen aerodynamic and exotic shapes

Airbags finally become the law by the end of the decade

Air conditioning systems were actually effective and worked, despite the downgrade from R12 freon to R134a refrigerant (mandated by the EPA)