2018 HYUNDAI SONATA — Complaint #1894831
Open-data reference.
NHTSA Complaint about ENGINE AND ENGINE COOLING:ENGINE filed May 15, 2023
NHTSA complaint #1894831 (ODI reference 11521976) concerns a 2018 HYUNDAI SONATA and was filed on May 15, 2023. The owner reports the failure occurred on April 1, 2023. The vehicle had 33,000 miles on the odometer at the time of the incident. The report was geocoded to Tennessee based on the filer's self-reported location. The affected component is categorized as engine and engine cooling:engine, 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 SONATA cohort independently describe similar engine and engine cooling:engine 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 SONATA shows the complete component-level complaint distribution alongside any active investigations or recalls.
Complaint Description
The contact owns a 2018 Hyundai Sonata. The contact stated that while driving approximately 30 MPH, the vehicle lost motive power and stalled in traffic. The vehicle was misfiring, and the RPM was abnormally elevated. While driving 40 MPH, the vehicle stalled again. There were no warning lights illuminated. Additionally, the vehicle was consuming an excessive amount of engine oil. The contact was adding approximately two quarts of engine oil every two weeks. The vehicle was taken to the local dealer but was not diagnosed. The vehicle was taken to another local dealer, Twin City Hyundai (3024 Alcoa Hwy, Alcoa, TN 37701, (866) 229-3953) but was not diagnosed or repaired. The manufacturer was not yet contacted. The failure mileage was approximately 33,000.
Complaint Details
| NHTSA Complaint ID | 1894831 |
| ODI Number | 11521976 |
| Date Filed | May 15, 2023 |
| Failure Date | April 1, 2023 |
| VIN | 5NPE24AF8JH |
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.