Various Minor Issues (indicated by TSBs)

With 53 Technical Service Bulletins (TSBs) issued, the CX-9 may experience a range of minor electronic, powertrain, or chassis-related issues. These often manifest as subtle drivability quirks or warning lights that dealers can address. Estimated repair cost: $100 - $500.

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2021 Mazda CX-9 Maintenance guide

Name: Maintenance dataset for 2021 Mazda CX-9
Creator: Carfocal

v1.0Updated Jun 12, 2026Ryan Davis4 Sources Analyzed

MAINTENANCE SUMMARY

The 2021 Mazda CX-9, with a combined MPG of 23 and 4-wheel drive, presents an average reliability verdict. Owners should prioritize inspections of the second-row seat assembly due to a recall concerning its stability in a crash.

View Critical Issue: Second-Row Seat Stability

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Reliability Score

Est. Annual Maintenance Cost

$400 - $700

TSBs & Recalls

53 TSBs | 2 Recalls

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Key Takeaways

Prioritize recall completion for second-row seat assembly.
Regular maintenance, including oil changes and filter replacements, is key.

2 more takeaways unlock below

Critical service intervals

Common failure analysis

Symptoms and prevention guidance