Toyota executives started to worry back in 2015 when BYD launched its Tang plug-in hybrid, with significant improvements in styling, quality and performance. Most worrying was that fact it was still about 30% cheaper than comparable Toyota models. There was a critical turn of events in 2017 when Toyota's top engineering leaders, including then-executive vice president Shigeki Terashi, drove several BYD cars such as the Tang at its proving ground in Toyota City near its headquarters in Japan. Terashi subsequently visited BYD's headquarters in Shenzhen and drove a prototype of its Han electric car. "Their long-term quality is still a question mark, but the design and quality of these cars showed levels of maturity, yet they were much cheaper than comparable Toyota models," said one of the four sources, who participated in the test drives.
"We were all kinda floored by that."