Based on the American market Toyota Highlander, the FCHV-3 and FCHV-4 had fuel cell stacks that put out 90kW — more than four times that of the FCEV-1 — to give a 150 km/h top speed and a cruising range of 250 km.
The FCHV-4 — mechanically very similar to the FCHV-3 — was the first Toyota fuel cell hybrid vehicle to be licensed for testing on Japan’s public roads. The tests began in June 2001, continuing for three years, and were designed to measure the car’s performance on highways, steep hills, and in other demanding environments.
Later in 2001, the FCHV-5 was revealed. The FHCV-5 was still based on the Highlander, but the model’s Clean Hydrocarbon Fuel (CHF) reformer — which generates electricity from hydrogen derived from CHF — featured a newly developed catalyst, heat exchanger, and other components to boost acceleration and economy.