FREE VEHICLE RESEARCH
2021 Hyundai Sonata
The 2021 Hyundai Sonata has 4 NHTSA safety recalls on file, 119 owner complaints, and gets about 27 mpg combined. Here's the full free record from NHTSA and the EPA.
SPECS
2021 Hyundai Sonata at a glance
- Engine
- 4-cyl 2.5L
- Cylinders
- 4
- Displacement
- 2.5 L
- Drivetrain
- Front-Wheel Drive
- Transmission
- Automatic (AM-S8)
- Body
- Large Cars
- Fuel
- Regular
Source: EPA / NHTSA vPIC, as of July 9, 2026.
SAFETY RECALLS · NHTSA
4 openFuel System, Gasoline
09/07/2021
Hyundai Motor America (Hyundai) is recalling certain 2021-2022 Santa Fe and Sonata vehicles equipped with 2.5L turbocharged engines. Fuel may leak at the pipe connection between the high-pressure fuel pump and fuel rail.
Remedy: Dealers will inspect and tighten, or replace the fuel pipe as necessary, free of charge. Owner notification letters were mailed on September 3, 2021. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 207.
Visibility
28/12/2021
Hyundai Motor America (Hyundai) is recalling certain 2020-2021 Santa Fe, 2021 Sonata, and Elantra vehicles. During manufacturing, the windshield may not have been properly bonded to the vehicle, allowing it to detach in a crash.
Remedy: Dealers will remove and reinstall the front windshield panel, free of charge. Owner notification letters were mailed June 20, 2022. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 216.
Power Train
06/10/2022
Hyundai Motor Company (Hyundai) is recalling certain 2021-2022 Santa Fe, Sonata, Veloster N, 2022 Santa Cruz, Elantra N, and Kona N vehicles. The vehicle's "fail-safe" limited-mobility drive mode may be impaired, when prompted by a transmission oil pump malfunction, which can result in a complete loss of drive power.
Remedy: Dealers will inspect and replace the transmission, as necessary. Dealers will also update the transmission control unit software. All repairs will be performed free of charge. Owner notification letters were mailed January 10, 2023. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 236.
Fuel System, Gasoline
18/11/2025
Hyundai Motor America (Hyundai) is recalling certain 2020-2023 Sonata vehicles. A damaged check valve can allow air to enter the fuel tank, causing it to expand and contact hot exhaust components, melting the tank.
Remedy: Dealers will inspect and replace the check valve. The fuel tank assembly will be inspected for damage and replaced if necessary. Additionally, dealers will inspect and update the engine control unit software. All repairs will be performed as necessary, free of charge. Owner notification letters were mailed beginning March 13, 2026. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 286. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov on November 19, 2025.
NHTSA has opened one or more investigations covering this model. Recalls can follow an investigation, so check NHTSA for the latest before you buy.
Open safety recalls are free to fix at any franchised dealer. What recalls mean → Source: NHTSA recalls, as of July 9, 2026. Recalls can be issued any time, confirm by VIN at nhtsa.gov before you buy.
OWNER COMPLAINTS · NHTSA
119 filed- 25
UNKNOWN OR OTHER
I was notified of a recall on my from vehicle by Hyundai via email some time in March of 2026. The message said mentioned my vehicle may have a defective/worn purge control check valve that would cause the fuel tank to deform. Potentially
- 21
POWER TRAIN
The vehicle has experienced repeated transmission and Electronic Oil Pump (EOP) failures resulting in loss of propulsion, loss of acceleration, and transmission-related malfunctions. The vehicle currently has approximately 69,000 miles. On
- 18
ENGINE
At approximately 130,000 miles, vehicle developed and internal coolant leak caused by a failed Exhaust Heat Recovery System (EHRS) in the center muffler assembly, matching TSB 23-EM-009H - a known manufacturing defect documented by Hyundai.
- 14
ELECTRICAL SYSTEM
The car will idle high around 1200 rpms. The car will most of the times fix the issue when you turn the car off and back on but it will start again after driving. This is a known issue with the car. I have had the egr valve replaced since i
- 9
FUEL SYSTEM
The contact owns a 2021 Hyundai Sonata. The contact stated while driving at an undisclosed speed, the engine shuddered and the engine stalled. In addition, the engine seized. No warning lights were illuminated. The contact stated that the v
- 5
FUEL/PROPULSION SYSTEM
I took my car to dealer to repair recall. Dealer told me if it failed they would keep car and report stolen if I tried to take it. They failed it. I didn't trust them based on their report it stolen statement. I had the police get my car ba
Problems owners reported to the government, useful for spotting patterns, not proof any one car has them. What complaints mean → Source: NHTSA complaints, as of July 9, 2026. Owner-submitted reports, not verified diagnoses.
CRASH-TEST RATINGS · NHTSA NCAP
- Overall
- ★★★★★
- Frontal
- ★★★★☆
- Side
- ★★★★★
- Rollover
- ★★★★★
Government crash tests of this model; not every trim or year is tested. Source: NHTSA NCAP, as of July 9, 2026.
FUEL & RUNNING COST · U.S. EPA
- Combined
- 27 mpg
- City / Hwy
- 23 / 33
- Est. fuel / yr
- $2,300
- CO₂ / mi
- 335 g
EPA lab estimates; real mpg varies by how you drive. Source: EPA fueleconomy.gov, as of July 9, 2026. Annual cost assumes 15,000 mi/yr at EPA's reference price.
All figures above come from free U.S. government sources: NHTSA (recalls, complaints, investigations, crash tests) and the EPA (fuel economy and specs). We don't show market price, insurance cost, or proprietary reliability scores, because there's no free, reliable public source for them. For a verdict on a specific listing, with a fair-offer number and what to ask the seller, that's the VINly app.
BEFORE YOU BUY
What to check on this car
Confirm the recalls were fixed
This model has 4 open NHTSA recalls (including the fuel system, gasoline). Recall repairs are free at the dealer, so ask the seller for proof the remedy was performed, or verify by VIN at nhtsa.gov before you buy.
Watch for a pending investigation
NHTSA has an open investigation covering this model. A recall can follow an investigation, so check nhtsa.gov for the latest before you commit.
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Test-drive the basics
Cold start, full-lock steering both ways, firm brakes with no pulsing, smooth shifts, and every electronic feature. Warning lights should come on at key-on, then go out.
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Check the title and the VIN
Confirm the title status in hand matches the listing, and that the VIN matches across the dash, door jamb, and title. VINly does not show ownership or accident history, for that, run a paid report like Carfax.
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Ask the seller the right questions
Why they are selling, any service records, accident or panel-repaint history, how many owners, and whether any open recalls were completed.
See the full used-car inspection checklist. None of this replaces a hands-on inspection by a mechanic.
Quick answers
What is recalled on the 2021 Hyundai Sonata? +
NHTSA lists 4 safety recalls for the 2021 Hyundai Sonata, including the fuel system, gasoline. See the full list above, and confirm by VIN at nhtsa.gov.
What gas mileage does the 2021 Hyundai Sonata get? +
The EPA rates the 2021 Hyundai Sonata at 27 mpg combined (23 city / 33 highway), about $2,300 a year in fuel.
How safe is the 2021 Hyundai Sonata? +
NHTSA's NCAP program gives the 2021 Hyundai Sonata 5 out of 5 stars overall, with 5 stars for rollover resistance.
What do owners complain about on the 2021 Hyundai Sonata? +
Owners have filed 119 complaints with NHTSA for the 2021 Hyundai Sonata, including 7 involving a crash. The most-reported area is unknown or other.
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