First car with factory sat nav? That’d be the 1990 Mazda Eunos Cosmo. Prior to that there had been some half-baked systems like Honda’s Electro Gyro-cator, but GPS changed everything. Or rather Bill Clinton did when he signed a bill in 2000 ordering the military to stop degrading satellite signals, in the process improving accuracy by a factor of 10. Today it’s hard to imagine going back to paper maps, or just pretending to know where you’re going.