Isuzu Motors Ltd. (いすゞ自動車株式会社) is a Japanese car, commercial vehicle and heavy truck manufacturing company, headquartered in Tokyo. In 2005, Isuzu became the world's largest manufacturer of medium to heavy duty trucks. It has assembly and manufacturing plants in the Japanese city of Fujisawa, as well as in the prefectures Tochigi and Hokkaidō. Isuzu is famous for producing commercial vehicles and diesel engines. By 2009, Isuzu had produced over 21 million diesel engines, which can be found in vehicles all over the world. Isuzu diesel engines are used by Renault, Opel and General Motors.
In most of Asia, Africa, and Europe, Isuzu is mostly known for trucks of all sizes, after Isuzu small automobile sales drastically plummeted and Isuzu had to drop all sales of sedans and compact cars in the late 1990s. In 2009, Isuzu abandoned the United States consumer market due to lack of sales. Isuzu as a corporation has always been primarily a manufacturer of small to medium compact automobiles and commercial trucks of sizes medium duty and larger, but markets around the world show different needs.
Isuzu Motors America discontinued the sale of passenger vehicles in the United States effective January 31, 2009. The company explained to its dealers that it had not been able to secure replacements for the Isuzu Ascender and Isuzu i-Series that would be commercially viable. Isuzu sold 7,098 cars in the year 2007. This action did not affect Isuzu's commercial vehicle or industrial diesel engine operations in the United States. Isuzu has a contract with Budget Truck Rental to manufacture their rental trucks, shared with Ford, GMC, and Navistar International.
On November 7, 2006, Toyota acquired 5.9% of Isuzu, making them the third largest shareholder behind ITOCHU and Mitsubishi Corporation.