Toyota Prius C 2012–2013 — technical service bulletin
Bulletin ZG8_Toyota POL17 · NHTSA communication 10142893 · issued Jun 20, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2012–2013
model years
2
vehicle entries
Official summary
Warranty Policy Bulletin: Toyota has received reports of customer concerns in which the vehicle may exhibit a combination of abnormal engine noise and rough idle caused by internal carbon deposit in the combustion chambers.
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.