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Hyundai Sonata
2021 · gas, sedan
6 measured figures
6 of the 9 figures this market publishes for a car like this one are measured for this car. This market publishes no overall score, so there is no share of a composite weight to measure confidence against; figures_measured says how many of this market's figures the row carries, and contributing_publishers says who measured them

Measured figures

Fuel economy32 mpg (US gallons)Measured by EPA · configuration: Sonata
Tailpipe CO₂175 g/kmMeasured by EPA · CO₂ basis: tailpipe_rated · configuration: Sonata · also 282 g/mile
HorsepowerFree with an accountMeasured for this car, with its publisher and basis
WarrantyFree with an accountMeasured for this car, with its publisher and basis
Recall campaignsFree with an accountMeasured for this car, with its publisher and basis
NHTSA overall ratingFree with an accountMeasured for this car, with its publisher and basis

4 more measured figures for this car — Horsepower, Warranty, Recall campaigns, NHTSA overall rating — each with the publisher that measured it and the basis it is on. Free to read with an account.

Figures this car does not carry

Fuel economy (MPGe)Not published for this carFuel economy (MPGe) is published for electric and hydrogen cars, whose economy is published as MPGe: energy converted at 33.7 kWh per gallon, not fuel burned; this car is not one of them, so the figure is not the same quantity for it
Tailpipe CO₂ (charge-weighted)Not published for this carthis car's CO₂ is published as the tailpipe rating for the car driven as rated on the test cycle (175 g/km), not as a composite weighted across electric and fuel-burning miles, so it is not the quantity this list orders. It is published as Tailpipe CO₂
Engine horsepowerNot published for this carNot published for this car. The record's own reason is free to read with an account.
Kerb weightNot published for this carNot published for this car. The record's own reason is free to read with an account.
EPA test weightNot published for this carNot published for this car. The record's own reason is free to read with an account.
Complaints per 10,000 builtNot published for this carNot published for this car. The record's own reason is free to read with an account.
PriceNot published for this carNot published for this car. The record's own reason is free to read with an account.

5-Year Running Costs

Fuel$9,313
Insurance$9,585 (modelled)
Maintenance$5,200 (class estimate)
Repairs$8,000 (modelled)
Depreciationnot estimated — we hold no purchase price for this car, and it is not assumed.
Totalnot estimated — a component above is unknown or modelled

Running costs only — the purchase price is not included. The five-year running cost is an ESTIMATE, not a measurement of this car: only its fuel half is computed from the car's own measured consumption and a dated pump price (see fuel_price_source and fuel_price_as_of in the market's own figures); insurance, maintenance and repairs are class models. It orders no list and is not one of this market's published figures. Fuel is this car's own combined consumption over 13,800 miles a year at $4.319 a US gallon of petrol (U.S. Energy Information Administration, Gasoline and Diesel Fuel Update: U.S. regular gasoline retail price, all formulations, weekly, 2026-09-14). Insurance, maintenance and repairs are models, not figures for this car: insurance from its power, weight and crash rating, maintenance from its make's class, repairs from its complaint and recall counts. They are shown for scale and are not used to rank it. Confidence is low: several components are modelled from class averages.

Known Issues

UNKNOWN OR OTHER
32 complaint(s) · 4 report a crash, fire, injury or death
SEEMS TO BE AN ISSUE WITH THE WIRELESS APPLE CAR PLAY. REGARDLESS IF THE VEHICLE IS IN MOTION OR NOT IT LOSES CONNECTIVITY. WHILE DRIVING THIS CAUSE YOU TO TAKE YOUR EYES OFF THE ROAD AS MESSAGES AP…
ENGINE
28 complaint(s) · 1 reports a crash, fire, injury or death
The contact owns a 2021 Hyundai Sonata. The contact stated that while the vehicle was at an independent mechanic for an oil change, the mechanic diagnosed the vehicle with transmission fluid leaking f…
POWER TRAIN
22 complaint(s)
My transmission went bad on my new car. Didn’t have my car for 4 month August 12 2021
FUEL/PROPULSION SYSTEM
18 complaint(s) · 2 report a crash, fire, injury or death
The car would excelerate while in park. While I was pressing the brakes the car would jerk forward, it would not just quietly idle. While driving the car would randomly speed up or slow down. Sometime…
ELECTRICAL SYSTEM
14 complaint(s)
So for the past year and half my cars left turn signal has been working intermittently. It just stops working and then it starts again. I have taken it to the dealer many times they changed out sign…
FUEL SYSTEM, GASOLINE
10 complaint(s)
The contact owns a 2021 Hyundai Sonata. The contact stated while driving at various speeds, he smelled an abnormally strong fuel odor inside the vehicle. There were no warning lights illuminated. The…
VISIBILITY/WIPER
6 complaint(s)
PANORAMIC SUNROOF EXPLOSION. HAPPENED ON OPEN HIGHWAY ROAD WITH NO CAR IN NEAR VICINITY OR SIGN OF ANY KIND OF DEBRIS HITTING THE VEHICLE.
AIR BAGS
4 complaint(s) · 2 report a crash, fire, injury or death
I turned on a highway and had gotten my car up to 45 mph when a deer came out of nowhere and I slammed into it hard back on January 12th. The car only suffered cosmetic damage thankfully, but the air…
FORWARD COLLISION AVOIDANCE: WARNINGS
4 complaint(s) · 1 reports a crash, fire, injury or death
STRUCTURE:BODY
4 complaint(s)
I was driving down the highway with my mom, no cracks in any of my windows before any of this by the way. And my sunroof exploded. Huge huge explosion sound. I thought something fell but there was not…

The 10 components named in the most complaints are shown, of 30 named in all.

These complaints are filed under SONATA, a name NHTSA also uses for other versions of this car, so some may concern those versions.

Data sources