The most frequent complaint category, with 108 instances, suggests potential problems within the drivetrain. Symptoms can range from performance degradation to more severe failures. Estimated repair cost: $500 - $4000+.

Service Brake Problems

With 59 complaints, issues with the service brakes are a significant concern. These can impact stopping power and overall vehicle safety. Estimated repair cost: $200 - $800.

Airbag System Concerns

While fewer in number (41 complaints), airbag issues, particularly those related to recalls, are critical safety concerns. Faulty sensors can prevent proper deployment. Estimated repair cost: $300 - $1000+.

Engine complaints, totaling 29, can include issues like stalling, particularly at low mileage, indicating potential early-life defects. Estimated repair cost: $300 - $2000+.

Complaints in the fuel/propulsion system, often at low mileage, include difficulties with fueling the tank and inaccurate range estimates. Estimated repair cost: $200 - $800.

CARFOCALvehicle research

2021 Toyota Highlander Maintenance guide

Name: Maintenance dataset for 2021 Toyota Highlander
Creator: Carfocal

v1.0Updated May 30, 2026Ryan Davis4 Sources Analyzed2 Critical Recalls

MAINTENANCE SUMMARY

The 2021 Toyota Highlander presents a maintenance profile marked by a significant number of powertrain complaints (108) and service brake concerns (59). Owners should prioritize vigilance for symptoms related to these systems.

View Critical Issue: Powertrain Issues

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Reliability Score

Est. Annual Maintenance Cost

$650

TSBs & Recalls

13 TSBs | 7 Recalls

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Key Takeaways

Prioritize inspection and maintenance of the powertrain and service brakes due to high complaint volumes.
Address airbag system recalls promptly, as they are critical safety items.

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Critical service intervals

Common failure analysis

Symptoms and prevention guidance