6. Mazda Eunos Cosmo
The Mazda Eunos Cosmo, produced from 1990 to 1995, was a technological marvel of its era. (en.wikipedia.org) It was the first production car to feature a built-in GPS navigation system, accessible via a color touchscreen display. (autoexpresscar.com) Additionally, it was powered by Mazda’s unique three-rotor 20B-REW rotary engine, delivering impressive performance. (autoevolution.com) However, these advanced technologies and the complexity of the rotary engine made maintenance challenging, especially outside Japan. (motortrend.com)