Mazda CX-9 2016–2018 — technical service bulletin
Bulletin SA-019-18 · NHTSA communication 10136766 · issued Apr 16, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2016–2018
model years
3
vehicle entries
Official summary
While inspecting turbocharger housings, you may see cracks (fractures) as shown below. The cracks do not affect engine performance or cause any noise, so replacement is NOT necessary.
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.