Mazda TSB #SA-058-20a
2020 Mazda MAZDA3
Affected Component: ENGINE AND ENGINE COOLING
- Summary
- A new cylinder head assembly for service parts has been newly established for SKYACTIV-G 2.5 with cylinder deactivation when replacement is needed. Valves, valve springs, valve spring seats, and cotters (IN/EX) are included in the new assembly. NOTE: Cylinder head replacement requires MASH authorization.