Every safety complaint, recall and defect investigation the US government
holds on this vehicle.
Owners have filed 134 safety complaints
about the 2021 Hyundai Sonata with the US government. Of those, 7 describe a crash, 13 people were injured and no death is recorded. 3 recall campaigns are open against it, covering the gasoline fuel system and the power train.
The most complained-about system is the engine,
named in 34 complaints, 25% of the total.
The typical failure was reported at 41,000 miles,
the median across the 25
complaints that gave
an odometer reading.
Compiled from NHTSA's complaint, recall and investigation files
· Covers March 2021 to September 2026 · How this is counted
What is on file
134 complaints on file
134
Complaints
7
Describe a crash
0
Mention fire
13
People injured
0
Deaths
A complaint is an unverified account by the person who filed it, not a
finding of fault. One complaint is one ODI number, which is how NHTSA counts
them.
Complaints rose by half year on year: 40 in the twelve months to 2026-Q2, against 25 in the twelve before.
A recall is the manufacturer conceding a defect, and the repair is free.
Whether one covers your particular car is a question only its VIN can
answer, because a campaign covers a production range rather than a
model year.
Which system owners named
Complaints naming each system
ENGINE 34 · 25%
34 25%
UNKNOWN OR OTHER 32 · 24%
32 24%
POWER TRAIN 25 · 19%
25 19%
FUEL/PROPULSION SYSTEM 21 · 16%
21 16%
ELECTRICAL SYSTEM 17 · 13%
17 13%
FUEL SYSTEM, GASOLINE 13 · 10%
13 10%
FORWARD COLLISION AVOIDANCE 9 · 7%
9 7%
VISIBILITY/WIPER 8 · 6%
8 6%
AIR BAGS 4 · 3%
4 3%
STRUCTURE 4 · 3%
4 3%
VISIBILITY 4 · 3%
4 3%
LANE DEPARTURE 3 · 2%
3 2%
01531
Red marks a system with a recall campaign against it.
One complaint can name several systems, so these add up to more than 134.
When the complaints arrived
By the year NHTSA received them
By the year NHTSA received them, which is not the year the failures
happened. They peaked in 2026 at 41.
44 33 22 11
212021222022232023242024252025262026
This is the year the complaint was filed, not the year the failure
happened. The range runs from 2021 to 2026, the last of them a part year, which is why its column is drawn faint.
Crash test ratings
NHTSA New Car Assessment Program
NHTSA crashes a car into a barrier and a pole and measures what
happens to the dummies inside. This is what it awarded the 2021 Hyundai SONATA, and it is a separate
question from what owners report going wrong later.
Test
4 DR FWD
Overall
Frontal crash
Frontal, driver
Frontal, passenger
Side crash
Side barrier
Side pole
Rollover
Chance of rollover
9.7%
Stability control standard Forward collision warning standard Lane departure warning standard
A dash means NHTSA did not rate that test for this vehicle.
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.
The risk
A melted fuel tank can leak, increasing the risk of a fire.
The 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.
Hyundai Motor America · up to 85,043 vehicles across all model years covered
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.
The risk
Loss of drive power increases the risk of a crash.
The 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.
Hyundai Motor America · up to 56,148 vehicles across all model years covered
FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
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.
The risk
A fuel leak increases the risk of a fire.
The 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.
Hyundai Motor America · up to 15,752 vehicles across all model years covered
Defect investigations
1 on file
An investigation means NHTSA has decided a pattern is worth examining. A
preliminary evaluation is often closed with no action; an engineering
analysis is the stage that usually precedes a recall.
Loss of Motive Power
DP22003
Closed defect petition · opened September 12, 2022 · closed December 12, 2023
the engine
The National Highway Traffic Safety Administration (NHTSA) received a letter dated July 13, 2022, petitioning the Agency to initiate a safety defect investigation into loss of motive power allegations attributed to oil drain pan assembly failures on certain Hyundai Motor America, Inc. and Kia America, Inc. vehicles spanning Model Years (MY) 2005-2021. The Petitioners cited examples of complaints indicating that the subject vehicles were experiencing rapid loss of engine oil due to oil drain plug back outs, resulting in loss of motive power and/or catastrophic engine damage. Additional complaints were provided which alleged that the oil drain pans lack sufficient structural integrity and are susceptible to cracking. The petition itself can be reviewed at NHTSA.gov under ODI number 11481745. On September 12, 2022, the Office of Defects Investigation (ODI) opened Defect Petition (DP22-003) to evaluate the Petitioners’ request. The Petitioners have provided additional complaints within four supplemental letters dated January 31, 2023, March 21, 2023, May 23, 2023, and August 4, 2023. ODI’s evaluation included the review and analysis of the complaints and supporting information submitted by the Petitioners, as well as additional complaints submitted directly to NHTSA which referenced either the oil drain plug or a crack in the oil pan. After reviewing the available data, ODI has not identified evidence that would support opening a defect investigation into the oil drain pan assemblies of the subject vehicles. Based on a review of the available information, a loss of motive power resulting from an oil drain plug back out has not occurred between the initial sale of a vehicle and the completion of its first oil change. If during an oil change service, a technician fails to remove the existing drain plug gasket before installing a new gasket, it is likely that a proper seal between the drain plug and the oil pan will not be made. An improper seal between the drain plug and oil pan could lead to the backing out on the drain plug, resulting in the sudden loss of oil while driving. Additionally, the provided examples of oil pan cracks were localized to the immediate vicinity of the oil drain plug and/or appeared to be the result of direct-contact with a tool during servicing. There is no information to support that a vehicle-based defect exists relating to the oil pan assembly, and instead the documented incidents are related to the failure to follow the proper maintenance procedures during oil change service. In October 2023, Hyundai published a Technical Service Bulletin (TSB) that provided detailed instructions for oil change service on its gasoline powered vehicles, specifically highlighting the need to remove and replace the existing drain plug gasket prior to reinstalling the drain plug. After a thorough review of the material submitted by the petitioner, the information already in NHTSA's possession, and the potential risks to motor vehicle safety implicated by the petitioners' allegations, NHTSA does not believe that a formal investigation is warranted. Therefore, the petition is denied. A Federal Register Notice (FRN) further detailing NHTSA’s reasons for denial of the petition will be published. The reference numbers for the complaints to NHTSA cited by the petitioner can be found in the petition submission documents in the public file for DP22-003. To review those complaints and the additional complaints ODI added to its evaluation which are cited in the Closing Resume ODI Report Identification Number document, go to NHTSA.gov.
In owners’ own words
Quoted from the complaint file
Quoted from NHTSA's complaint file. These are unverified accounts by the
people who filed them, not findings of fault.
AIR BAGS
7 injured · crash · towed
During a front end collision the car did not auto brake and the air bags did not deploy. The car has been totaled and is currently at a dealership for insurance appraisal.
NHTSA complaint 11679381. Filed by an owner and not verified by NHTSA or by us.
FUEL/PROPULSION SYSTEM
5 injured
I bought this car in June 2013 for its safety and its Amazing warranty and all the features that it has Hyundai manufacture had an obligation as a consumer service and failed to send notification of any recalled to us in regards to a recall High pressure, fuel pump, and fuel rail Fuel system engine, gas tank This is a product of liability and negligence on time but they failed to take responsibility and comply with federal laws. I was driving with my family in the car when this car was a ticking Time bomb not even being aware of the Death trap on wheels. We ended having towed our home and then to then had to make a call next day and have it towed to Hyundai service center While we were …
NHTSA complaint 11668446, quoted in part. Filed by an owner and not verified by NHTSA or by us.
FUEL SYSTEM, GASOLINE
1 injured · 100,000 miles
The contact owns a 2021 Hyundai Sonata. The contact received notification of NHTSA Campaign: 25V796000 (Fuel System, Gasoline); however, parts were on back order. The contact stated that while driving at an undisclosed speed, the vehicle jerked with an abnormal gasoline odor inside the vehicle. An unknown warning light was temporarily illuminated. Upon further inspection, the contact became aware that the fuel level had dropped. The vehicle was taken to a local dealer where it was diagnosed with an expanded fuel tank. The contact stated that the O2 sensor, spark plugs, and ignition coils were replaced by a local independent mechanic; however, the failures persisted. The contact had …
NHTSA complaint 11765048, quoted in part. Filed by an owner and not verified by NHTSA or by us.
PARKING BRAKE
crash · 1,400 miles
The contact owns a 2021 Hyundai Sonata. The contact stated that after driving out of the garage and parking in the driveway with the engine idling and remote smart parking assist feature activated, 6 minutes later the vehicle suddenly began to slowly roll forward into the garage area making contact with a second vehicle that was parked in the garage before crashing into the back of the garage wall and stopping. During the incident, no injuries were reported, and no police report was filed. The vehicle was taken to the local dealer who was unable the duplicate the failure. The manufacturer was also notified of the failure. The approximate failure mileage was 1,400.
NHTSA complaint 11425935. Filed by an owner and not verified by NHTSA or by us.
POWER TRAIN
My 2021 Hyundai Sonata N Line suffered a catastrophic, sudden total loss of drive power while operating at speed on a public roadway, creating an immediate crash hazard. The vehicle lost forward propulsion and the gear selector flashed a blinking 'R' when reverse was attempted. The vehicle was towed to an authorized dealer, [XXX] Hyundai Southtowne, where their factory GDS tool pulled transmission code P283601 (Shift Fork 'B' Position Circuit). This matches the exact critical safety failure path targeted by Federal Safety Recall 236 (NHTSA Campaign 22V-746) for the 8-speed wet-DCT high-pressure electric oil pump circuit failure. The vehicle previously received the 2022 software patch, but …
NHTSA complaint 11767539, quoted in part. Filed by an owner and not verified by NHTSA or by us.
FUEL/PROPULSION SYSTEM
DESCRIPTION OF SAFETY DEFECT & IMMEDIATE HAZARD:My 2021 Hyundai Sonata SEL is currently exhibiting the most severe, catastrophic symptoms of the fuel tank expansion defect covered under NHTSA Campaign 25V796000. The fuel tank has expanded so drastically that it physically warped the structural interior of the cabin, violently popping the rear passenger seat completely out of its assembly while the vehicle was in motion. Furthermore, there is a constant, heavy, raw gasoline odor inside and around the vehicle. The vehicle is a documented, active fire, explosion, and vapor inhalation hazard. It is currently physically located at Sterling Hyundai in Lafayette, LA.DESCRIPTION OF MANUFACTURER …
NHTSA complaint 11766388, quoted in part. Filed by an owner and not verified by NHTSA or by us.
POWER TRAIN
Transmission replaced twice and all of them continue to fail. Several Hyundai service centers are unable to determine the cause and are only able to update/relearn and replace whenever they are able to replicate the issue. The issue is that at a cold start, the car makes a popping sound, jerks and shakes. The car hesitates to accelerate. You can hear the noise of acceleration but RPM does not go past 3 and MPH doesn't go past 30mph. I'm unable to upload docs because of the upload limit. If there's another way to send docs, please let me know
NHTSA complaint 11764277. Filed by an owner and not verified by NHTSA or by us.
FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL
Massive loss of coolant in closed loop cooling system Heat soak. Fail safe mode
NHTSA complaint 11759867. Filed by an owner and not verified by NHTSA or by us.
FUEL SYSTEM, GASOLINE
towed · 55,000 miles
The contact owns a 2021 Hyundai Sonata. The contact received notification of NHTSA Campaign Number: 25V796000 (Fuel System, Gasoline); however, the part to do the recall repair was not yet available. The contact stated that while driving at an undisclosed speed, the vehicle independently accelerated and decelerated while the accelerator pedal was depressed. The check engine warning light was illuminated. The vehicle was towed to a local dealer where it was diagnosed with an expanded frame due to an expanded fuel tank. The vehicle was deemed too expensive to repair per the local dealer and was towed for a buy-back. The manufacturer was made aware of the failure, but no assistance was …
NHTSA complaint 11758588, quoted in part. Filed by an owner and not verified by NHTSA or by us.
If this is your car and a dealer keeps failing to fix it, your state's
lemon law may require the manufacturer to replace it or buy it back. How
many repair attempts it takes, and how long you have to file, is set by
the state you bought in and by nothing on this page.
Complaints: NHTSA's ODI
complaint file, published October 2, 2026. One
complaint is one ODI number, which is how NHTSA counts them.
Recalls: NHTSA's recall
campaign API, newest campaign on this vehicle filed November 18, 2025.
Investigations: NHTSA's ODI
investigation file, published October 2, 2026.
A complaint is one owner's account and has not been verified by NHTSA or by
us. A vehicle with more complaints is not necessarily worse: models that
sold in larger numbers collect more of them. How this is counted.
G
Compiled and maintained by guarledes Independent developer and analyst