Only 15 buses were produced in Iran in the seventh calendar month (September 23 - October 22) of current Iranian year.
The figure shows 81.5 per cent decrease compared to the same period of previous year, the ISNA News Agency reported.
The production at Raniran, Iran Khodro Diesel, Yavaran Khodro and Akia companies was completely halted in the mentioned period.
Iran produced 364,807 cars in the first seven months of the current Iranian calendar year, which started on March 21, the IRNA News Agency reported.
Some 311,155 sedan cars, 49,365 pickup trucks, 4,038 trucks, 199 buses, and 50 minbuses were produced in the country in the mentioned period.
Iran produced 291,638 cars in the first six months of the current Iranian calendar year, which started on March 21.
The figure shows 36.5 per cent decrease compared to the same period of previous year, the ISNA News Agency reported.
Iran produced 989,110 cars in 2012, which made the country Asia's eighth largest car manufacturer.
Iran also ranked 18th in the world.
China, Japan, South Korea, India, Thailand, Turkey, and Indonesia were Asia's seven largest car manufacturers.
Iran's automobile output faced 40 per cent decrease in 2012. The country was Asia's 5th largest car manufacturer in 2011, with a total output of 1,648,505.
International sanctions pulling out foreign automakers from Iran, increasing prices of raw materials and foreign currencies are the main problems that the car manufacturers face.
The world's total car production stood at 84,141,209 cars in 2012, which is 5.3 per cent more than in previous year.