2001 Oldsmobile O4
The O4 (short for “Open Four”) was one of Oldsmobile’s last concept cars, designed to appeal to a younger crowd. It was a stylish, compact four-seater with a retractable roof panel and a minimalist interior. Instead of a traditional instrument cluster, it had a central digital display and tons of personalization options.
Think of it as GM’s answer to the VW Cabrio or Mini Cooper—but a little too late. The O4 showed that Oldsmobile had some fight left in it, but the brand was already on the chopping block. The O4 was the inspiration for later GM models such as the Pontiac Solstice roadster.