New spy shots from the Besturn B90. The B90 will be the biggest Besturn to be launched sometime next year. The B90 is based on the new Mazda 6 from the FAW-Mazda joint venture. The Mazda 6 shares platform, interior and engine with the B90. Besturn is one of FAW’s own brands, next to Hongqi (Red Flag) and a breed of cars simply branded ‘FAW’.