A defect in the tire valve stem can lead to potential air loss, affecting tire pressure and potentially posing a safety risk if pressure drops significantly while driving. Estimated repair cost: $50 - $150.

2021 Mazda CX-30 Maintenance guide

Name: Maintenance dataset for 2021 Mazda CX-30
Creator: Carfocal

v1.0Updated Jun 12, 2026Daniel Wilson4 Sources Analyzed

MAINTENANCE SUMMARY

The 2021 Mazda CX-30, with a combined MPG of 25 and 4-wheel drive, presents an 'Average' reliability verdict. While recall and complaint counts are low (2 and 0 respectively), a high TSB volume (84) suggests potential for minor, non-safety-critical issues.

View Critical Issue: Power Liftgate Malfunction

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Reliability Score

Est. Annual Maintenance Cost

$400 - $700

TSBs & Recalls

84 TSBs | 2 Recalls

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Key Takeaways

The 2021 Mazda CX-30 offers good reliability with a low number of recalls and complaints.
A high volume of TSBs indicates potential for minor, non-safety-critical issues requiring dealer attention.

2 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance