Mazda MAZDA2 2014–2017 — technical service bulletin
Bulletin 01-018-16 · NHTSA communication 10185822 · issued Oct 25, 2016
Technical service bulletin
communication type
Back Over Prevention
component
2014–2017
model years
9
vehicle entries
Official summary
Unusual engine noise after a cold engine start. Some customers may complain about an unusual noise coming from the engine compartment for about 20 seconds after a cold engine start. This noise is a normal engine operation for improved exhaust gas emissions. The noise does not indicate a malfunction.
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.