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NHTSA-Verified · Common Problems

2021 Hyundai Sonata Hybrid
Common Problems

Ranked from 46 federal NHTSA complaints. Every problem links to the complaint IDs behind it.

2
High severity
1
Medium

3 Common Problems

Ordered by how often owners reported each one to NHTSA. The bar shows how common a problem is relative to the most-reported on this vehicle. Expand any problem to see the federal complaint IDs.

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  1. 1

    Random 12V Battery Failure

    34complaints
    High severityElectrical

    The 12V battery randomly dies, requiring manual reset to start the vehicle.

  2. 2

    Automatic Emergency Braking Malfunction

    20complaints
    Medium severityOther

    The automatic emergency braking system malfunctions, activating unnecessarily or failing to function properly.

  3. 3

    Engine Overheating

    19complaints
    High severityEngine

    The engine overheats, leading to coolant leakage and white smoke emission.

    $150–$1,200est. cooling-system diagnosis + repair · 1–6 hrs labor
    Get local quotes

Other years & sources

2016 Hyundai Sonata HybridAll NHTSA complaints for this vehicle →

Data source: U.S. National Highway Traffic Safety Administration (NHTSA) owner complaints and recalls. Problems are clustered and ranked from the complaint record; occurrence counts reflect corroborating complaints, not total incidence. Vehicle image is illustrative. Repair-cost figures are typical U.S. independent-shop ranges (parts + labor) for the class of repair shown — actual quotes vary by region, engine, and diagnosis; always confirm with a local shop.