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.

3 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance

2021 Toyota Highlander Maintenance guide

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

MAINTENANCE SUMMARY

View Critical Issue: Powertrain Issues

Subscribe to Recall Alerts Subscribe to Recall Alerts

Reliability Score

Est. Annual Maintenance Cost

$650

TSBs & Recalls

13 TSBs | 7 Recalls

CarFocal account required

Unlock the Full 2021 Toyota Highlander Maintenance Guide

Create a free account to reveal the full service schedule, repair costs, and deeper diagnostic data.

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.

3 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance