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CN7 · Sedan

2021 Hyundai Elantra

Common problems & what to know before you buy

Before you message the seller, know the documented failure patterns, repair cost exposure, and risk level for the 2021 Hyundai Elantra.

Common problems

What to watch for on the 2021 Hyundai Elantra

critical·2.0L Smartstream

Piston Oil Ring Failure (Recall)

Some early engines were recalled because improperly heat-treated piston oil rings can lead to oil consumption and engine damage.

Typical repair cost
$4,000 – $8,000

Which of these apply to your 2021 Elantra?

Your guide shows which apply to the exact car, and what to ask the seller.

Safety record

Recalls on the 2021 Hyundai Elantra

Recall·21V796000

Seat belts: front

In the event of a crash, the front driver-side and/or passenger-side seat belt pretensioner(s) may explode upon deployment.

Recall·21V00M000

Visibility: windshield

During manufacturing, the windshield may not have been properly bonded to the vehicle, allowing it to detach in a crash.

Recall·21V302000

Seats: recliner

The driver and front passenger seat back recliners may have been improperly welded.

3 more in the guide, with whether each one was done on the car you're looking at.

Source: NHTSA

Owner complaints

What 132 owners reported

Electrical system27
Seat belts21
Forward collision avoidance18
Vehicle speed control8

Source: NHTSA

Specifications

2021 Hyundai Elantra at a glance

Trims
Blue HybridLimitedLimited HybridN LineSESEL
Engine
1.6L 4-Cylinder Hybrid, 2.0L 4-Cylinder, 1.6L 4-Cylinder Turbo
Transmission
DCT 6-spd, CVT, DCT 7-spd, Manual 6-spd
Drivetrain
FWD
Fuel
Hybrid, Gasoline
Body style
Sedan
Generation

About the CN7

The 2021-present Hyundai Elantra is the CN7 generation and returned the model to bold, heavily creased styling on a longer, lower, and wider body. Powertrains include a 2.0-liter four-cylinder with an intelligent variable transmission, a hybrid pairing a 1.6-liter engine with a six-speed dual-clutch, a 1.6-liter turbocharged N Line with a seven-speed dual-clutch, and the Elantra N with a 2.0-liter turbocharged engine producing 276 horsepower. All drive the front wheels.

The Elantra N is the significant addition, giving the model genuine performance credentials with an electronically controlled limited-slip differential, adaptive dampers, and an available eight-speed wet dual-clutch. The hybrid is the efficiency standout in the range. Interior technology took a large step forward with available twin ten-inch displays.

As a used buy, the CN7 Elantra is recent enough that most examples retain factory coverage. The relevant ownership consideration for the earlier years of this generation is the theft vulnerability affecting certain Hyundai and Kia models built without an engine immobilizer, which prompted a software update program and affected insurance availability in some markets. Confirming whether a specific car received that update matters. The hybrid and the Elantra N are the two versions that stand out most clearly against class rivals.

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FAQ

Frequently asked questions

What are the common problems with the 2021 Hyundai Elantra?

Owners have filed 132 complaints about the 2021 Hyundai Elantra with NHTSA, most often about the forward collision avoidance. There are 6 recall campaigns covering this model year. Known problems on its engines include piston oil ring failure. Squeezed's free research-backed buyer guide cross-references these against documented failure patterns and mileage-stage risks, sorted by severity, in about a minute.

Is the 2021 Hyundai Elantra reliable?

Reliability depends heavily on the specific configuration and how the car was maintained. Start with the 6 open recall campaigns on this model year and confirm the work was completed. Generate a Squeezed buyer guide for this exact vehicle to see a reliability snapshot, repair-cost exposure, and the questions to ask the seller before you buy.

Should I still get a pre-purchase inspection on a 2021 Hyundai Elantra?

Always. A Squeezed buyer guide is the triage step before the inspection: it shows you the documented failure patterns and what to check so you can decide which 2021 Hyundai Elantra listings are even worth a mechanic's time, then walk into the PPI knowing exactly what to look for.

Squeezed is a buyer guide based on public data and industry patterns, not a mechanical inspection. Always get a professional pre-purchase inspection before you buy.