BYD Auto is a manufacturer.
BYD Auto Co. , Ltd. is a Chinese automobile manufacturer based in Xi'an , Shaanxi Province , and a wholly owned subsidiary of BYD Company . Its principal activity is the design , development , manufacture and distribution of passenger cars and buses sold under the BYD brand . It also has a 50:50 joint venture with Daimler AG , Shenzhen BYD Daimler New Technology Co. , Ltd. , which develops and manufactures luxury electric cars sold under the Denza brand . In October 2016 , BYD Auto became the all-time second largest global plug-in car manufacturer after the Renault-Nissan Alliance .