Forward Collision Avoidance System Malfunctions

Complaints indicate issues with warnings and adaptive cruise control, suggesting potential sensor or software problems. These can lead to false activations or system failures. Estimated repair cost: $300 - $1,500.

Electrical System Glitches

Owners report broad electrical system problems, including warning lights, power loss, and unexpected shutdowns. These can stem from battery, alternator, or control module issues. Estimated repair cost: $200 - $1,000.

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2021 Hyundai Elantra Maintenance guide

Name: Maintenance dataset for 2021 Hyundai Elantra
Creator: Carfocal

v1.0Updated May 30, 2026Daniel Wilson4 Sources Analyzed

MAINTENANCE SUMMARY

The 2021 Hyundai Elantra, with 18 recalls and 193 complaints, presents a 'Below Average' reliability verdict. Key concerns include seat belt pretensioners, forward collision avoidance systems, and electrical stability, with some failures reported at low mileage.

View Critical Issue: Seat Belt System Issues

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Reliability Score

Est. Annual Maintenance Cost

$400 - $600

TSBs & Recalls

8 TSBs | 18 Recalls

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Key Takeaways

The 2021 Hyundai Elantra has a 'Below Average' reliability rating.
Frequent issues are reported with Forward Collision Avoidance systems and Seat Belts.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance