UD Nissan Diesel

Nissan Diesel Motor Co., Ltd. (日産ディーゼル工業株式会社) or UD (The company's trademark) is a Japanese company whose principal business is the manufacture and sales of diesel engines (straight: 3, 4, 5 and 6; V: 8, 10 and 12), light, medium and heavy duty diesel trucks, buses, bus chassis and special-purpose vehicles.

The UD and Nissan Diesel is an international trademark for Nissan Diesel trucks (Nissan Diesel does not mean the Diesel trucks from Nissan, actually "Nissan Diesel" refers to another company other than "Nissan"). The "UD" trademark, which originally stood for "Uniflow Diesel", taking its name from Nissan Diesel's successful Uniflow Scavenging Diesel engine, has been marketed to mean "Ultimate Dependability".

Nissan Diesel is now owned by the Volvo Group. In March 2006, Volvo acquired 40 million shares in Nissan Diesel, corresponding to 13% of the votes and capital. In September of the same year, Volvo increased its ownership to 58.2 million shares corresponding to 19% of votes and capital. At the same time, Volvo purchased all 57.5 million preference shares in the company that through 2014 would be converted in stages and which in 2014 would provide Volvo with 46.5% of the votes and capital in the company, after full dilution.