NHTSA Complaint #11708090 — 2017 KIA NIRO

ENGINE issue reported to NHTSA

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Complaint Details

ODI Number	11708090
Vehicle	2017 KIA NIRO
Component	ENGINE
Date of Incident	December 19, 2025
Date Filed	December 31, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	WA

Consumer Description

Failed/leaking coolant heat exchanger which is integrated into the rear catalytic converter assembly. This seems to be a well-known issue with 2017-2020 Kia Niros. Leaks cause overheating of the engine or no heat in the vehicle and potential blown head gaskets. This issue has been confirmed by an independent service center. Car itself gave no messages or warnings regarding the leak.

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