Verified government source

NHTSA complaint #11716729

This page summarizes an official U.S. National Highway Traffic Safety Administration owner complaint. Use the verification links below to confirm the record directly with NHTSA.

Vehicle

2021 HYUNDAI TUCSON

Manufacturer

Hyundai Motor America

Components

POWER TRAIN,ENGINE,FUEL/PROPULSION SYSTEM

Dates

Incident: 01/10/2025
Filed: 02/09/2026

Owner complaint summary

The vehicle experienced a catalytic converter efficiency failure that was confirmed by an authorized dealership in January 2025. The dealer indicated the catalytic converter required replacement; however, the replacement was not performed, and the vehicle was returned to service with an unresolved emissions defect. Less than one year later, the vehicle developed recurring emissions system failure, loss of power, drivability issues, and repeated warning indicators. The vehicle is currently out of service while additional components, including oxygen sensors and spark plugs, are reported to be affected. The manufacturer is declining to replace the catalytic converter and is attributing the condition to oil consumption despite the prior unresolved emissions failure. The issue has been confirmed by dealership diagnostics and has resulted in prolonged loss of use of the vehicle. This appears to be a continuing engine and exhaust/emissions system defect that was not properly remedied when first identified and may affect safe operation of the vehicle.

This is an owner complaint filed with NHTSA (ODI #11716729). It is not automatically an official recall, investigation outcome, or manufacturer admission unless the complaint text itself describes one.

Official record ID (ODI): 11716729. This page is the human-readable source link used across afterwarranty. The raw JSON link proxies NHTSA's public API for machine verification; prefer this page when reading the complaint.