Is the 2021 Hyundai Sonata reliable?

Overall reliability is competitive for a midsize sedan, with many owners reporting solid day-to-day dependability. The most frequent complaints center on electronics and minor fit-and-finish issues rather than major engine failures.

What are the most common 2021 Hyundai Sonata problems?

Common issues include infotainment glitches (freezing or connection drops), intermittent driver-assistance sensor warnings, wind noise or interior rattles, and uneven tire wear if alignment or rotations are neglected.

Are maintenance costs high for a 2021 Sonata?

Maintenance costs are typically reasonable for the segment, especially when following routine services like oil changes, filters, tire rotations, and brake fluid intervals. Unexpected costs are more likely to come from tires (on larger-wheel trims) or out-of-warranty electronic repairs.

What are the best years of Hyundai Sonata to buy?

Many shoppers target later-model years within a generation after early updates; the 2020+ redesign brought major changes, and the 2021 benefits from being a follow-up year. For the best fit, compare trims and powertrains (2.5L, 1.6T, Hybrid, N Line) based on your priorities.

What should I check before buying a used 2021 Hyundai Sonata?

Verify recall completion and look for available software updates, test all infotainment functions (Bluetooth, camera, CarPlay/Android Auto), and check for warning lights related to safety sensors. Inspect tire wear for alignment issues, review service records for regular oil changes, and take a highway test drive to evaluate wind noise and steering feel. For deeper details, get a complete owner’s guide with full specs, trim differences, and the factory maintenance schedule to keep your 2021 Hyundai Sonata running its best.

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Reliability AnalysisBased on known issue patterns, repair cost data, and ownership trends · How we score

2021 Hyundai Sonata Reliability ReportB- grade · moderate risk · system-by-system breakdown

82/ 100

KeepScore

MODERATE RISK

Grade: B-

A technologically advanced and stylish sedan that offers great value, provided you’re diligent with maintenance and aware of its minor tech and powertrain idiosyncrasies.

Full system breakdown + what I would do

Quick Facts · 2021 Hyundai Sonata

The system most likely to surface first: infotainment & electrical (moderate severity).
Has 4 NHTSA recalls on record — the most notable involves the fuel system, gasoline:delivery:hoses, lines/piping, and fittings.
Scores 6 points below the strongest nearby year — the 2022 Hyundai Sonata earns a 88.

Is the 2021 Hyundai Sonata Worth Buying?

The 2021 Hyundai Sonata is a stylish and feature-rich mid-size sedan that generally offers a good ownership experience. While its modern powertrains are mostly solid, potential buyers must be aware of specific electrical and transmission quirks to ensure a smooth journey. Overall, it's a value-packed option, but requires a thorough pre-purchase inspection and diligent maintenance.

Biggest Strengths

Modern interior and tech features
Fuel-efficient engine options (excluding N-Line)
Strong aesthetic design

What Tends to Fail First on the 2021 Hyundai Sonata

The systems that break first on the 2021 Hyundai Sonata. Mileage windows, repair costs, and fix-before-you-buy notes are in the full report.

Infotainment & Electricalmoderate

Transmission (8-speed DCT - N-Line)moderate

Engine (GDI related)moderate

Typical mileage, cost ranges, and the exact what-to-check list are in the full report.

2021 Hyundai Sonata Recall History

4 recalls on record from NHTSA. Check your VIN atnhtsa.gov to see if the repair was performed.

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.

VISIBILITY:WINDSHIELD

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.

What breaks on the 2021 Hyundai Sonata?

Full reliability breakdown — engine, transmission, rust, electrical. With repair costs and mileage danger zones.

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Other Hyundai Sonata Years to Consider

Compare KeepScores across nearby years of the Hyundai Sonata. Click any year for its full report.

All Hyundai Sonata years ranked →Hyundai Sonata years to avoid →Hyundai Sonata common problems →

2021 Hyundai Sonata Alternatives

Similar class, similar year range — ranked by KeepScore.

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