Kia Niro 2017–2022 — technical service bulletin
Bulletin PS709 · NHTSA communication 10201616 · issued Sep 27, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2017–2022
model years
13
vehicle entries
Official summary
PITSTOP: ENGINE OVERHEATING IN NIRO HEV/PHEV - This Pitstop provides information to help troubleshoot an overheating symptom on some 2017-2022MY Niro HEV (DE HEV) and 2018-2022MY Niro PHEV (DE PHEV) which may exhibit coolant boiling in the reservoir. Overheating may occur due to a bypass valve in the Exhaust Heat Recovery System (EHRS) stuck in the closed position.
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.