2021 Hyundai Elantra Problems: 5 Known Issues
2021 model year · 456+ owner reports · Updated October 2026
According to Au7o's analysis of 456+ owner reports, the 2021 Hyundai Elantra has 5 documented known issues, with 4 rated critical. The most serious are Front Seat Belt Pretensioner May Explode and Project Metal Fragments (Recall 229), Non-Conforming Clear Coat Causing Inadequate Windshield Bonding and Detachment in a Crash (Recall 216 / 21V00M) ($0-$0 repair), Phantom / False Automatic Emergency Braking and Forward Collision Activation ($0-$350 repair) and Turn-key cars without an immobilizer are easy to steal — Hyundai campaign 993. The most commonly reported issue is IVT fault codes and transmission damage — bulletins 20-01-047H and 23-AT-010H with 456 owner reports. DIY maintenance guides at au7o.io.
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All 5 Known Issues
NHTSA Recalls13 recalls
ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:GAS RECIRCULATION VALVE (EGR VALVE)
Hyundai Motor America (Hyundai) is recalling certain 2024 Elantra, Venue, and Kona vehicles. An electrical short circuit may occur in the exhaust gas recirculation (EGR) valve assembly, which can result in a loss of drive power.
SEAT BELTS:FRONT
Hyundai Motor America (Hyundai) is recalling certain 2021 Elantra, Elantra HEV, Venue, Genesis GV80 and 2022 Genesis GV70 vehicles. In the event of a crash, the front driver-side and/or passenger-side seat belt pretensioner(s) may explode upon deployment.
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.
SEATS:FRONT ASSEMBLY:RECLINER
Hyundai Motor America (Hyundai) is recalling certain 2021 Elantra vehicles. The driver and front passenger seat back recliners may have been improperly welded.
SEAT BELTS:FRONT
Hyundai Motor America (Hyundai) is recalling certain 2021-2022 Elantra and 2020 Accent vehicles. In the event of a crash, the front driver and passenger-side seat belt pretensioners may explode upon deployment.
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Frequently Asked Questions
What are the most common Hyundai Elantra problems?
According to Au7o's analysis of 456+ owner reports, the 2021 Hyundai Elantra has 5 documented issues. The most frequently reported are: Front Seat Belt Pretensioner May Explode and Project Metal Fragments (Recall 229), Non-Conforming Clear Coat Causing Inadequate Windshield Bonding and Detachment in a Crash (Recall 216 / 21V00M), Phantom / False Automatic Emergency Braking and Forward Collision Activation. Of these, 4 are rated critical and should be addressed promptly.
Is the Hyundai Elantra reliable?
The 2021 Hyundai Elantra has 5 known issues documented across 456+ owner reports. 4 issues are rated critical: Front Seat Belt Pretensioner May Explode and Project Metal Fragments (Recall 229) and Non-Conforming Clear Coat Causing Inadequate Windshield Bonding and Detachment in a Crash (Recall 216 / 21V00M) and Phantom / False Automatic Emergency Braking and Forward Collision Activation and Turn-key cars without an immobilizer are easy to steal — Hyundai campaign 993. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
How much does it cost to fix common Hyundai Elantra problems?
Repair costs for known Hyundai Elantra issues range from $0 to $350, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
What is the 2021-2022 Hyundai Elantra Front Seat Belt Pretensioner May Explode and Project Metal Fragments (Recall 229)?
NHTSA recall 22V354 includes certain 2021-2022 Hyundai Elantra and Elantra HEV vehicles. A driver- or passenger-side pyrotechnic pretensioner may deploy abnormally in a crash because its pipe can over-pressurize, allowing metal fragments to enter the occupant compartment and inju… Severity: high.
What is the 2021 Hyundai Elantra Non-Conforming Clear Coat Causing Inadequate Windshield Bonding and Detachment in a Crash (Recall 216 / 21V00M)?
A batch of 2021 Elantras built between 29 October 2020 and 8 January 2021 was painted with clear coat containing a non-compliant additive supplied by Axalta. The contaminated clear coat sits in the windshield aperture and prevents the urethane adhesive from bonding properly to th… Repairs typically run $0-$0. Severity: high.
What is the 2021-2024 Hyundai Elantra Phantom / False Automatic Emergency Braking and Forward Collision Activation?
The Forward Collision-Avoidance Assist (FCA) and Blind-Spot Collision-Avoidance systems can trigger hard automatic emergency braking when no real obstacle is present. Owners report sudden, unprompted braking at 40-65 mph on open road, plus false activation when a vehicle passes c… Repairs typically run $0-$350. Severity: high.
What is the 2011-2022 Hyundai Elantra Turn-key cars without an immobilizer are easy to steal — Hyundai campaign 993?
Hyundai says certain 2011-2022 models with a turn-key ignition and no engine immobilizer were targeted in a rise in thefts spread on social media. Its campaign updates the body control software to strengthen the factory alarm and ignition-start logic and adds anti-theft window de… Severity: high.
What is the 2020-2023 Hyundai Elantra IVT fault codes and transmission damage — bulletins 20-01-047H and 23-AT-010H?
On certain 2020 Elantras the IVT (Hyundai's CVT) can store transmission codes and light the check engine lamp; Hyundai's campaign updates the transmission software and replaces the IVT when the listed codes show it may be damaged. On 2020-2023 IVT Elantras covered by bulletin 23-… Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.