Hampered by its heavy and unreliable BRM engine, it won only one race, the 1966 United States Grand Prix.

[5] The first sign of trouble was when the H16 engine arrived at the Team Lotus factory in Hethel, Norfolk and it required four men to lift it from the truck.

In 1967 the 43 made its final appearance at the South African Grand Prix at the Kyalami circuit, where Clark and new team mate Graham Hill both retired their cars.

Only two cars were built and were later sold to Robert Lamplough and Jock Russell, who fitted them with 4.7 litre Ford V8 engines and competed in Formula 5000 events.

(key) A driveable, detailed reconstruction of the Lotus 43 (with matching car physics) appeared in 2007 in the freely-available '66 Mod' for the PC-based racing simulation Grand Prix Legends.