Significant and recurring engine failures, including complete seizure and potential fire risk, have been reported. This is linked to improper heat treatment of piston oil rings as per recall 21V301000. Estimated repair cost: $3,000 - $7,000.

Complaints include issues with transmission engagement and shifting, potentially leading to unpredictable performance. Estimated repair cost: $1,500 - $3,500.

Electrical System Faults

Less frequent but notable complaints include random activation of safety systems like the blind spot monitor and intermittent power loss. Estimated repair cost: $200 - $800.

CARFOCALvehicle research

2021 Hyundai Kona Maintenance guide

Name: Maintenance dataset for 2021 Hyundai Kona
Creator: Carfocal

v1.0Updated May 30, 2026Ethan Miller4 Sources Analyzed1 Critical Recalls

MAINTENANCE SUMMARY

The 2021 Hyundai Kona, with a combined MPG of 27, faces significant engine concerns, accounting for 50% of its 114 complaints. Owners should prioritize engine inspections and be vigilant for oil consumption and unusual noises, especially given the recall for piston oil rings.

Powertrain: Battery Electric (BEV)

View Critical Issue: Engine Failure

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Reliability Score

Est. Annual Maintenance Cost

$600 - $900

TSBs & Recalls

2 TSBs | 1 Recalls

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Key Takeaways

Prioritize engine health due to significant failure reports and a recall.
Regular oil changes with synthetic oil are critical.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance