Tata Motors produced their four millionth vehicle in 2006, and in that year began a joint venture with Brazil's Marcopolo to manufacture buses for India ar foreign markets, expanded Tata Daewoo's product line include LNG-powered tractor-trailer trucks, and established three joint ventures with Fiat. The company formed a joint venture with Thonburi Automotive Assembly Plant Co. in Thailand to manufacture assemble, and market pickup trucks. In 2007, Tata sold all its interest in Tata-Holset to Cummins, Inc.