NHTSA Complaint #11680402 — 2016 HYUNDAI SONATA

ENGINE issue reported to NHTSA

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Complaint Details

ODI Number	11680402
Vehicle	2016 HYUNDAI SONATA
Component	ENGINE
Date of Incident	July 13, 2025
Date Filed	August 13, 2025
Mileage	N/A miles
Crash	No
Fire	No
Injuries	0
Deaths	0
Vehicle Towed	No
State	KS

Consumer Description

The engine began knocking on us, towed to dealership. Safety concern was dying on the highway with other cars around. The dealer said it needs a new engine. Not sure there were any indications of failure or not. Some records indicate in order for Hyundai to warranty, this car needed to have had campaign 953 KSDS installed prior. Some records such as the TG3 TXXI warranty state that in April 2022, the KSDS campaign update was no longer required for the Hyundai Theta II engine warranty. owner did not perform KSDS 953, based on not receiving the information. Hyundai is currently denying warranty, but if TG3 TXXI is correct, the dealer has yet to fully inspect, and the fact remains that in April 2022 the Campaign 953 is no longer a prerequisite. I dont feel like I should be denied assistance. Please help.

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