Buyer Research

2021 Hyundai Elantra — Should You Buy One?

Typical asking price: $14,000–$19,000. This is one of the more reliable vehicles in its class — here's what to watch for anyway.

Deciding between model years? Compare the 16 Hyundai Elantra years we've written up →

Kestrel Take

First year of the seventh-generation Elantra — the sharp-creased body, the 2.0L engine with the IVT, and a hybrid alongside it. 129 complaints is a modest record for a first-year car, and its shape is not the old Elantra's: nothing about a knocking engine or a clunking steering column. Instead a quarter of it is the forward-collision system braking for ghosts or switching itself off, a quarter is the backup camera and the horn dying, and a fifth is owners waiting on parts for the seat-belt pretensioner recall, which Hyundai issued three times before it stuck. Six recalls in all, and two of them — the pretensioners and the rear camera — matter. This is a car we would buy at $14,000 to $19,000 with every recall closed and a highway drive in which the safety system never flinched; on a 2021 the powertrain is still inside Hyundai's 5-year/60,000-mile coverage for a second owner, which is worth confirming by VIN with a dealer.

What we checked

Reconciled against public records, 2026-09-25

NHTSA holds 129 owner complaints for the 2021 Hyundai Elantra, and 6 recall campaigns.

A big number here usually means a lot of these were sold, not that it is a bad vehicle — popular models collect more complaints for the same rate of trouble. So the total on its own says little. What is worth reading is the shape of it. The largest single group is the driver-assist and automatic braking systems at 25%. That is notable without being overwhelming — worth checking, not worth panicking about.

6 recall campaigns cover this model year. Recalls are repaired free, for any owner, with no time limit on most safety campaigns — but only if someone books it in. Ask the seller to show it was done, or have any dealer check the VIN; it takes them a couple of minutes and costs nothing.

Counts come from the NHTSA complaint and recall database — free, public, and worth checking yourself.

Known Issues for the 2021 Hyundai Elantra

Ranked by wallet impact. These are documented, recurring problems — not freak accidents. How we decide that.

Forward-collision system brakes for nothing, or shuts itself off with a warningMedium

Thirty-two complaints, the largest cluster on the car, one crash. Two failures share the label. The first is phantom braking: the automatic emergency braking clamps on hard on an open road, most often on the highway with nothing ahead, and owners describe nearly being rear-ended. The second is the 'Check Forward Safety System' message with the system disabled, sometimes with smart cruise going with it, with a stored sensor code and a dealer who finds nothing or quotes a radar unit out of warranty. On a 2021 the sensor should be inside the 5-year/60,000-mile new-vehicle warranty, so push the dealer before you pay. On the test drive, take it on a highway with overpasses and parked cars on the shoulder and see whether it flinches; a car that has already thrown the warning will show it in the dealer's stored codes.

Repair cost (estimate): $150–$400 for a radar recalibration; $800–$1,500 for a front radar sensor out of warranty

Source: NHTSA complaints filed under the driver-assist and automatic braking systems (32).

Seat-belt pretensioners can explode in a crash — recalled three times (21V796, 22V218, 22V354)Medium

In a crash the front seat-belt pretensioners can rupture instead of firing, throwing metal fragments into the cabin. Hyundai recalled 2021 Elantras for it in late 2021 (21V796, replacement pretensioners), again in early 2022 (22V218), and a third time in mid-2022 (22V354), when the remedy became a cap secured over the pretensioner. Most of the 27 seat-belt complaints here are owners filing that the part was not available for months in 2022; the rest are belts that will not retract. The fix takes about an hour and is free. Check the VIN and make sure the final campaign is the one that shows closed, not just the first; then pull each front belt out fully and let it go — it should retract smartly to the pillar.

Repair cost: $0 with the recall — verify it was performed

Source: NHTSA complaints filed under seat belts (27); 6 NHTSA recall campaigns on this model year.

Backup camera goes blank (recall 24V879); horn stops working; car will not read the keyMedium

Thirty electrical complaints. The biggest piece is the rearview camera: the screen shows nothing in Reverse, or a frozen image of whatever it last saw, which one owner discovered while backing toward a closed garage door. Recall 24V879, issued late 2024, replaces the camera for a cracked circuit board, and at least one owner reports the replacement failing again within eighteen months. The second piece is the horn, which quits outright on this generation — a horn itself, not a fuse — and a few owners describe the car refusing to see the key fob and locking them out. Press the horn before you leave, shift into Reverse with the car running and wait for a live image, and check the VIN for the camera recall.

Repair cost: $0 with the recall — verify it was performed; $80–$250 for a horn; $250–$500 for a camera out of warranty

Source: NHTSA complaints filed under electrics and electronics (30); 6 NHTSA recall campaigns on this model year.

Front seat-back recliner welds (21V302) and a windshield that may not be bonded — two build-quality recallsMedium

Recall 21V302 covers 2021 Elantras whose driver and front passenger seat-back recliners may have been welded badly; in a crash the seat back could separate from its frame. Dealers inspect and replace the seat-back frame if it fails. A separate 2021 recall covers a windshield that may not have been properly bonded to the body during manufacture and can come out in a crash; the fix is to pull and reinstall the glass. Neither shows a symptom you can feel, which is exactly why they go undone. Both are free, both are a VIN lookup away, and a car that has had the windshield reinstalled is worth a look along the top edge of the glass for a wavy urethane line or a rattle over bumps.

Repair cost: $0 with the recall — verify it was performed

Source: 6 NHTSA recall campaigns on this model year.

Sixteen engine complaints on the 2.0L — not the recalled engine, but the same familyMedium

The 2.0L Nu MPI in this car is the same engine family that was recalled on the 2019–2020 Elantra for piston oil rings that were not heat-treated, and the 2021 is not part of that recall. Sixteen engine complaints, no fires and no crashes, is too few and too undetailed for us to say what they describe on this year, and we will not pretend to. What that leaves the buyer is the check that would have caught the earlier engine: pull the dipstick, ask for oil-change receipts and compare them to the odometer, and listen at a cold start for a tick that keeps time with the revs. A 2021 should still be inside Hyundai's powertrain coverage for a second owner; confirm the VIN's status with a dealer rather than assume.

Repair cost (estimate): $100–$300 for an oil-consumption test; $4,500–$7,500 if it ever needs an engine out of warranty — about 45% of what this car is typically worth

Source: NHTSA complaints filed under the engine (16).

Walk-Away Red Flags

✗'Check Forward Safety System' on the dash, or a hard brake on an empty highway during the drive
✗Any of the six recalls open on the VIN lookup — especially the seat-belt pretensioner campaigns
✗Backup camera blank or frozen in Reverse
✗Horn that does not sound
✗Front seat belt that retracts slowly or stops short of the pillar
✗Oil below the add mark on the dipstick

Good Signs

✓All six recalls closed on the VIN lookup, with the final pretensioner campaign among them
✓Replacement rear camera fitted under 24V879 with the dealer repair order
✓Front radar recalibrated or replaced under warranty, with the work order
✓Dealer confirmation by VIN that the 5-year/60,000-mile powertrain coverage still applies
✓Oil-change receipts that line up with the odometer at 5,000 to 7,500-mile intervals