Top Gear Series 2 Episode 9 Original Airdate: 13 July 2003

The Hy-wire (Hydrogen drive-by-wire) is a concept car from General Motors originally introduced in January 2002. The car runs on hydrogen fuel cells and uses a drive-by-wire system, meaning that the car is controlled electronically. GM asked school children to name the car, and one of them suggested "Hy-wire".

The Hy-wire is powered by a fuel cell capable of producing 94 kilowatts of power continuously and up to 129 kilowatts for short periods.[4] The fuel cell itself is supplied with hydrogen from 3 tanks of compressed hydrogen located in the chassis. With its three-phase electric motor the 1,814 kg (4,000 lb) vehicle has a top speed of 160 km/h (100 mph