2021 Hyundai Sonata Safety Report
2021 Hyundai Sonata: High crash test scores, but significant recalls and powertrain complaints raise reliability concerns.
AI Safety Analysis for the 2021 Hyundai Sonata
Reliability Score
The 2021 Hyundai Sonata receives a reliability score of 65 out of 100 based on analysis of NHTSA complaint data, recall history, crash reports, and safety ratings. This indicates average reliability — some notable concerns exist that prospective buyers should be aware of.
Known Issues for the 2021 Hyundai Sonata
The following issues have been identified from NHTSA complaint data and owner reports for the 2021 Hyundai Sonata:
| Issue | Severity | Frequency | Typical Mileage |
|---|---|---|---|
| Fuel System Leaks/Fire Risk Two recalls (25V796000, 21V796000) address fuel leaks from a damaged check valve or high-pressure fuel pipe connection, increasing fire risk. Complaints mention strong gas smells and unrepairable recall conditions. |
High | Occasional | all miles |
| Loss Of Drive Power / Transmission Issues A recall (21V796000) for 'fail-safe' limited-mobility drive mode leading to loss of power. Complaints describe the vehicle failing to accelerate, shaking, and transmission hesitation/jerking. |
High | Occasional | all miles |
| Engine Coolant Leaks / Overheating Complaints reference a technical service bulletin (23-EM-009H) for a faulty heat exchanger causing coolant leaks into the exhaust, leading to thick white smoke, overheating, and coolant disappearance. |
High | Occasional | 30000-60000 miles |
| Windshield Detachment Risk A recall (21V796000) indicates the windshield may not have been properly bonded during manufacturing, increasing injury risk if it detaches during a crash. |
High | Rare | all miles |
| Electrical System Malfunctions Complaints mention random 12V battery drain, dashboard warning lights (ABS, engine, tire pressure) flashing, and loss of acceleration, suggesting electrical system instability. |
Medium | Occasional | all miles |
Common Problems Reported by Owners
Based on NHTSA complaint data, the following components account for the majority of reported issues with the 2021 Hyundai Sonata:
A significant portion of complaints are categorized broadly, indicating a variety of issues not fitting specific component categories, often related to general vehicle malfunction or recall-related frustrations.
Issues include loss of acceleration, hesitation, jerking, and the vehicle shutting off unexpectedly, often linked to transmission or engine power delivery.
Complaints detail rattling/knocking noises, check engine lights (e.g., P0471 code), and severe shaking, sometimes related to coolant leaks or general engine malfunction.
Problems range from battery drain, especially the 12V auxiliary battery, to various dashboard warning lights illuminating and affecting vehicle operation.
Strong fuel odors, fuel tank expansion, and issues related to recall 25V796000 where a remedy is unavailable, causing concern about fire risk and drivability.
Frequently Asked Questions About the 2021 Hyundai Sonata
Is the 2021 Hyundai Sonata safe?
Based on NHTSA data, the 2021 Hyundai Sonata received excellent crash test ratings (5-star overall). However, it has 4 safety recalls, two of which address fire risks from fuel leaks and another for potential loss of drive power. There are also 109 complaints, including 7 crashes and 12 injuries, with recurring issues related to the powertrain and engine, suggesting potential reliability concerns despite strong crash performance.
What are common problems with the 2021 Hyundai Sonata?
The most reported issues for the 2021 Hyundai Sonata include 'UNKNOWN OR OTHER' (18% of complaints), 'POWER TRAIN' (11%), and 'ENGINE' (8%). Specific problems frequently mentioned are fuel system leaks with fire risk (addressed by recalls), loss of drive power, engine coolant leaks leading to overheating, and various electrical system malfunctions like battery drain and dashboard warning lights.
Are there any recalls for the 2021 Hyundai Sonata?
Yes, the 2021 Hyundai Sonata has 4 recalls. These include recalls for fuel system issues that could lead to fire (NHTSA Campaign Numbers 25V796000 and 21V796000), a recall for potential loss of drive power due to a transmission 'fail-safe' mode (21V796000), and a recall for improper windshield bonding that could cause it to detach in a crash (21V796000).
How does the 2021 Hyundai Sonata perform in crash tests?
The 2021 Hyundai Sonata performed very well in NHTSA crash tests, earning a 5-star overall safety rating. It received 5 stars for side crash and rollover resistance, and 4 stars for frontal crash tests.
What should I look out for when buying a used 2021 Hyundai Sonata?
When considering a used 2021 Hyundai Sonata, prioritize checking if all 4 recalls have been addressed, especially those related to the fuel system and transmission. Pay close attention to any signs of engine issues (unusual noises, check engine light, coolant levels) or transmission problems (hesitation, jerking, loss of power). A pre-purchase inspection by a trusted mechanic is highly recommended to identify potential coolant leaks or electrical system anomalies.
Buyer Advice
Our recommendation: While the 2021 Hyundai Sonata has strong crash test ratings, potential buyers should be aware of multiple safety recalls and recurring complaints regarding the powertrain, engine, and fuel system. Ensure all recalls are completed and consider a thorough pre-purchase inspection to mitigate risks associated with these known issues.
NHTSA Data Summary for 2021 Hyundai Sonata
This safety report is based on a comprehensive analysis of data from the National Highway Traffic Safety Administration (NHTSA) for the 2021 Hyundai Sonata. The data includes 109 consumer complaints filed by vehicle owners, 4 manufacturer-initiated safety recalls, 7 reported crashes, 12 reported injuries, and safety rating assessments associated with this vehicle.
The NHTSA has assigned the 2021 Hyundai Sonata an overall safety rating of 5 out of 5 stars, with a frontal crash rating of 4 stars, a side crash rating of 5 stars, and a rollover rating of 5 stars. These ratings are determined through controlled crash testing conducted by the NHTSA.
All data presented in this report is sourced from public NHTSA databases. Our AI analysis identifies patterns across complaint narratives, correlates them with recall history, and produces the safety assessment above. This analysis is updated as new complaints and recalls are filed with the NHTSA.
Consumers are encouraged to report vehicle safety problems to the NHTSA at nhtsa.gov. If your vehicle is subject to a recall, contact your dealer to schedule the free repair.