Mazda CX-5 2018–2021 — technical service bulletin
Bulletin SA-058-20 · NHTSA communication 10177956 · issued Jul 24, 2020
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2021
model years
9
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.
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.