Mazda CX-5 2018–2020 — technical service bulletin
Bulletin SA-058-20c · NHTSA communication 10185186 · issued Dec 3, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2020
model years
8
vehicle entries
Official 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.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.