Recall 21V101 affects 599 2021 Mazda CX-30 and MAZDA3 vehicles with tire air valves prone to sudden leaks. Repair is free at franchised Mazda dealers.
Mazda is recalling 599 2021 CX-30 and MAZDA3 vehicles because air can suddenly leak from the tire air valve. A sudden leak can cause loss of vehicle control while driving and increase crash risk, and Mazda dealers will complete the recall repair free of charge.
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What's wrong?
The tire air valve on the 2021 Mazda CX-30 and MAZDA3 is the small valve mounted in the wheel that holds air pressure inside the tire. On these vehicles, the valve is part of the wheel sensor assembly, which helps the tire-pressure system track air pressure and alert the driver when pressure drops.
Mazda traced the defect to the supplier assembly process. Some tire air valve parts that had already been installed into wheel and tire assemblies were mixed back in with new parts, then installed again. Reinstalling the valve can damage the sealing surfaces, so the valve no longer seals the tire as designed. That damage can lead to a slow leak or a sudden loss of air from an inflated tire.
The warning sign is a tire-pressure warning lamp and warning messages in the Multi-Information Display when pressure drops. If those alerts appear, the tire is losing air and the vehicle needs Mazda dealer service.
Who's affected?
Covers CX-30 and MAZDA3 vehicles using the same tire air valve sensor part.
| 2021 Mazda CX-30 | tire |
|---|---|
| 2021 Mazda MAZDA3 | tire |
| Units affected | 599 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not confirm inclusion. Check your VIN to confirm whether your specific vehicle is included.
What's the safety risk?
If a tire air valve leaks suddenly, tire pressure drops while the vehicle is moving. That can lead to loss of vehicle control and increases the risk of a crash. Watch for a warning lamp or tire pressure message in the Multi-Information Display. Slow down, avoid hard maneuvers, and arrange service. Repair is free at any franchised Mazda dealer.
What should I do?
- Check your VIN to confirm your 2021 Mazda CX-30 or MAZDA3 is included in this recall.
- Contact your nearest franchised Mazda dealer to schedule the free tire-air-valve replacement that fixes the sudden air-leak risk.
- Bring the recall notice if Mazda sent one. If not, reference recall number 21V101 when you call.
- Drive cautiously until the repair is complete. Stop in a safe place if a tire loses air while driving.
What happens at the repair
At the dealer, a Mazda technician replaces all four tire air valves with new parts. The recall repair is free, and parts and labor are covered. Repairs already paid out of pocket are handled through the new vehicle warranty, not through a separate reimbursement program. Ask the service desk how warranty coverage applies if you have prior repair paperwork for this tire air valve issue.
| Reimbursement | Warranty coverage applies |
|---|
Timeline
| February 22, 2021 | NHTSA published the recall |
|---|---|
| February 25, 2021 | Dealer notification began |
| February 25, 2021 | Dealer notification ended |
| April 6, 2021 | Owner notification mailed |
| April 23, 2021 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V101?
Recall 21V101 covers 599 2021 Mazda CX-30 and MAZDA3 vehicles with tire air valves that can suddenly leak air. A sudden leak can cause loss of vehicle control while driving and increase crash risk. Mazda dealers will replace all four tire air valves for free.
What should I do if my 2021 Mazda CX-30 or MAZDA3 is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 21V101. If it is, contact a franchised Mazda dealer to schedule replacement of all four tire air valves. Reference recall 21V101000 or Mazda recall number 4721B when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. Mazda dealers will replace all four tire air valves with new parts free of charge, regardless of where the vehicle was originally purchased.
What is the safety risk?
The safety risk is sudden air loss from a tire air valve while driving. That can cause loss of vehicle control and increase crash risk. If your VIN is included, schedule the free valve replacement with a franchised Mazda dealer.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V101000 |
|---|---|
| Mazda customer service | 1-800-222-5500 |
| NHTSA recall # | 21V101 |
| NHTSA recall # (full) | 21V101000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Misc. Document (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 24, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →