The HB platform was introduced in 1981 as the Mazda Cosmo coupe and Mazda Luce/929 sedan. The Luce was updated in 1986, with the 929 following the next year for some markets, but the Cosmo continued on the HB platform until 1989.
Applications:
- 1981–1985 Mazda Luce
- 1981–1986 Mazda 929
- 1981–1989 Mazda Cosmo
Read more about this topic: Mazda H Platform