Toyota Prius 2013–2015 — technical service bulletin
Bulletin ZH1_Toyota POL17 · NHTSA communication 10141598 · issued May 21, 2018
Technical service bulletin
communication type
Power Train
component
2013–2015
model years
3
vehicle entries
Official summary
Warranty Policy Bulletin: Toyota has received reports of customer concerns in which the vehicle may exhibit a brief intermittent shudder during torque converter flex lock up. This shudder may be observed while driving under light throttle conditions between approximately 25-50 mph.
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.