Mazda CX-5 2018–2019 — technical service bulletin
Bulletin SA-012-19 · NHTSA communication 10159200 · issued Apr 1, 2019
Technical service bulletin
communication type
Engine
component
2018–2019
model years
4
vehicle entries
Official summary
On some vehicles, a tapping or knocking noise may be heard from the top end after the engine cools down (vehicle is parked overnight) or it has been idling for an extended time. The tapping noise will decreases as the vehicle is being driven or if the RPM is held above 2500-3000 RPM.
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.