Mazda CX-5 2018–2019 — technical service bulletin
Bulletin 01-013-19-3605 · NHTSA communication 10163363 · issued Jul 16, 2019
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2019
model years
2
vehicle entries
Official summary
Some customers may experience both the check engine light and Selective Catalytic Reduction (SCR) warning light illuminating at the same time. This concern may be caused by lower and/or higher pressures that are detected, which are caused by micro air bubbles that remain inside the urea tank. The micro air bubbles are created at the production line when the liquid (urea) is poured quickly into the urea tank. To eliminate this concern, the pump filter will be modified to reduce any remaining micro air bubbles.
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.