Pretty sure that for 2021 the Mazda CX-30 has ditched cylinder deactivation. I see it mentioned nowhere on the USA website. Hopefully this mean the 2021 Mazda 3 has removed it as well. I provided screen shots and a link as well.
www.mazdausa.com

2026 Mazda CX-30 Trims & Specifications | Mazda USA
Check out the available trims and specs of the Mazda CX-30, from the 2.5 S trim to the 2.5 Turbo Premium Plus trim.
