BYD Auto Co., Ltd. is the automotive subsidiary of the Chinese multinational BYD Co Ltd (BYD stands for "Build Your Dreams"), which is based in Xi'an, Shaanxi Province. It was founded in January 2003, following BYD Company's acquisition of Tsinchuan Automobile Company in 2002. The company produces automobiles, buses, electric bicycles, forklifts, rechargeable batteries and trucks. The current model range of automobiles includes electric vehicles, plug-in hybrids and petrol-engined vehicles.
The Denza brand, a joint venture with Daimler AG, produces luxury electric cars.
The BYD stand at the 2009 Central China High-Tech Fair in Shenzhen
BYD Co Ltd created the wholly owned subsidiary BYD Auto a year after its 2002 acquisition of the Norinco-owned Qinchuan Machinery Works, which may have been made solely to acquire the passenger car production license held by the purchased company. Qinchuan had been manufacturing cars since 1987, when the company began production of the 0.5 L (30.5 cu in) QJC7050 model. At the time of the acquisition, the QCJ7181 Flyer was in production, which from 2005 was rebadged to the "BYD Flyer."
In 2008, a plugin hybrid version of the BYD F3 compact sedan was introduced. Total sales in 2009 were 448,400 vehicles. In the same year, BYD began the export of its cars to Africa, South America and the Middle East, where the cars competed on price, not quality.
In 2012, the municipal government of Shenzen purchased 500 BYD E6 cars for use as taxis. A total of 506,189 passenger cars were sold in China in 2013, making it the tenth-largest selling brand.
In 2013, BYD was awarded The Top Crash Facility Award of the year 2013.
In 2014, the BYD Qin plug-in hybrid had total sales of 14,747 (plus a relatively small number of sales in Latin America), In 2015, sales of the Qin increased to 31,898 and the Qin was the 88th highest selling sedan in China. In 2016, the BYD Tang plug-in hybrid SUV had 31,405 sales, the plug-in hybrid version of the Qin compact sedan had 21,868 sales and the BYD e6 electric compact MPV had 20,605 sales. By 2016, total sales of the Qin were 68,655 cars.
In 2015, the company was planning to open factories in Brazil to produce electric cars and buses. In July 2015, exports to Russia were suspended, due to the war in Ukraine and the falling value of the Russian currency. BYD was the highest selling brand of highway legal light-duty plug-in electric vehicles (combined sales for plug-in hybrids and battery electric cars), with 61,772 passenger vehicles sold, mostly plug-in hybrids. BYD continued as the world's top selling plug-in car manufacturer in 2016 with over 100,000 units sold, up 64% from 2015. BYD sold more than 100,000 new energy passenger cars in China in 2016. The BYD Tang was the top selling plug-in car in China in 2016 with 31,405 units delivered.
BYD achieves top rankings of 2015 J.D Power's Quality Study.
In September 2016, the company became the third largest manufacturer of plug-in cars, with a total of 161,000 plug-in cars produced since 2008. Also in September 2016, the company introduced a range of electric sanitation truck models, to be used in Beijing.
In 2019, BYD launched its global design center, which is led by an all-star team of industry veterans from Audi, Ferrari, and Mercedes-Benz. Leading the team is Wolfgang Egger. The carmaker unveiled its E-SEED GT, the first joint effort from the new design team, at the Auto Shanghai industry show in April 2019. The futuristic design concept reflects the sleek lines of the Chinese dragon, and the company plans to feature more Chinese cultural symbols in future models.
A company logo formerly used by BYD Auto from 2005-2009 strongly resembled the BMW logo.
Settled Albuquerque bus claim
In December 2018, the Albuquerque council filed a lawsuit against BYD for "issues including bolts falling off doors, doors opening on their own and battery range issues".
BYD disputed the city's allegations and disputed Mayor Tim Keller's "false and misleading statements." 
The lawsuit was settled with no money changing hands. A joint statement was issued in May 2019.
Facilities consist of two manufacturing plants in Xi'an, an R&D center and manufacturing plant in Shenzhen (the headquarters of BYD Co Ltd), a manufacturing plant in Changsha, a manufacturing plant in Shaoguan, and an R&D center and parts plant in Shanghai. Construction of a third manufacturing plant in Xi'an resumed in 2011, following the company being fined for illegal land use.
In 2010, BYD Auto sold a total of 519,800 vehicles, representing 2.9% of the market in China and the sixth largest manufacturer. In 2011, the BYD sales rank was outside the top ten. In 2012, the company became the 9th largest car manufacturer in China, producing over 600,000 vehicles.
The majority of vehicles are sold within China, however export markets include Bahrain, the Dominican Republic, Ukraine and Moldova.
^Staff (14 January 2016). "Best-selling Sedan in 2015". China Auto Web. Retrieved 17 January 2016. A total of 31,898 Qins were sold in China in 2015.
^ abStaff (19 January 2017). "Best-selling China-made EVs in 2016". China Auto Web. Retrieved 25 January 2017. Three BYD Auto models topped the Chinese ranking of best-selling new energy passenger cars in 2016. The BYD Tang SUV was the top selling plug-in electric car in China in 2016 with 31,405 units sold, followed by the BYD Qin with 21,868 units sold, and ranking third overall in 2016 was the BYD e6 with 20,605 units.