2018 HYUNDAI TUCSON — Complaint #2175698
Open-data reference.
NHTSA Complaint about ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR filed February 11, 2026
NHTSA complaint #2175698 (ODI reference 11717223) concerns a 2018 HYUNDAI TUCSON and was filed on February 11, 2026. The owner reports the failure occurred on March 11, 2025. The vehicle had 99,400 miles on the odometer at the time of the incident. The report was geocoded to Texas based on the filer's self-reported location. The affected component is categorized as engine and engine cooling:exhaust system:emission control:catalytic convertor, one of NHTSA's standardized taxonomy codes used to group defect patterns across make, model, and year.
The filer flagged the following severity indicators: crash: no, fire: no, injuries: 0, fatalities: 0. No crash, fire, or fatality was associated with this report, which places it in the early-warning stream rather than the priority-review stream. Because a VIN was supplied, this complaint is tied to a specific vehicle and not just a model-year cohort.
Individual complaints are consumer-submitted and unverified by NHTSA engineers — the agency's role at this stage is to collect, index, and make them searchable. What matters for federal action is the pattern: when many owners of the same HYUNDAI TUCSON cohort independently describe similar engine and engine cooling:exhaust system:emission control:catalytic convertor failures, defect investigators have grounds to open a PE and request manufacturer data. Related filings for the same vehicle and component appear below, and the detail page for the full 2018 HYUNDAI TUCSON shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
The contact owns a 2018 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the vehicle lost automotive power. The vehicle was pulled over to the shoulder lane, engine oil was added, and the contact waited for several minutes for the vehicle to return to normal operation. There was no warning light illuminated. The vehicle was taken to be diagnosed; however, the dealer was unable to determine the cause of the failure. The dealer suggested that the contact occasionally add oil to the vehicle. The vehicle was not repaired. The contact stated that while the accelerator pedal was depressed, there was an abnormal sound coming from the engine compartment. The vehicle was taken back to the dealer, where it was diagnosed, and it was determined that the catalytic converter needed to be replaced. The vehicle was not repaired. The vehicle was taken to an independent mechanic, where it was diagnosed, and it was determined that the catalytic converter needed to be replace
Complaint Details
| NHTSA Complaint ID | 2175698 |
| ODI Number | 11717223 |
| Date Filed | February 11, 2026 |
| Failure Date | March 11, 2025 |
| VIN | KM8J23A46JU |
Similar ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR Complaints for 2018 HYUNDAI TUCSON
The contact's sister owns a 2018 Hyundai Tucson. The contact stated that while his sister was driving at an undisclosed speed, the vehicle briefly jerked and jolted, prompting her to pull over to the
The contact owns a 2018 Hyundai Tucson. The contact stated that while driving at 65 MPH, the vehicle lost motive power, prompting him to pull to the side of the roadway, where the vehicle failed to re
Source: NHTSA Vehicle Complaints Database. Component taxonomy and severity codes are standardized by NHTSA Office of Defects Investigation.
Read our methodology — how this data is sourced, computed, and verified.