Complex sentence: Diesel technology is widespread in light trucks especially in Japan and Europe, but the bad reputation of diesel fuel, and the previously bad quality of the fuel has led to the rarity of such vehicles in the U.S market.
Split into simpler sentences: Diesel technology is widespread in light trucks, especially in Japan and Europe. The bad reputation of diesel fuel and the previously bad quality of the fuel, however, have led to the rarity of such vehicles in the U.S market.