History of the diesel car issue as a lot of diesel fuel contained water and also high levels of sulfur at the time. The engine was later revised into the DX block and most of the issues were fixed, a V6 version displacing 4.3 litres and a smaller 4.3 V8 were also offered around this time, mainly for the downsized front-wheel drive models of the mid-1980s and although they were much better in the reliability department, the damage had already been done and the North American diesel car market was severely crippled as a result, despite the best efforts by Mercedes-Benz, Audi, BMW, Peugeot, VW
DESA (company) engine assembly began in 1996, RK 215 engine production began in 2000. In 2009 the company unveiled Iran's first indigenous heavy diesel engine, the D87. A dual fuel (gas / diesel) version is also to be produced. The company produces diesel generators for permanent and emergency electricity supply. 104 units have been supplied to the Iran Telecommunications Company. The company is a supplier to both the Iranian Islamic Republic Railways and the Raja Passenger Train Company. DESA has manufactured the Ruston RK 215 diesel engine for the AD43C mainline diesel locomotive, of which 70 units were manufactured by Wagon Pars.