Recall 21V937 affects 76 2021 Hyundai Accent vehicles for brake master cylinder seal damage. Repair is free at any franchised Hyundai dealer.
Hyundai is recalling 76 2021 Accent vehicles because sharp edges in the brake master cylinder can damage the inner oil seal and reduce braking performance. The defect can lengthen brake pedal travel or stopping distance, increasing crash risk, and Hyundai dealers will complete the recall repair free of charge.
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What's wrong?
The brake master cylinder on the 2021 Hyundai Accent turns brake pedal movement into hydraulic pressure. When you press the pedal, the master cylinder pushes brake fluid through the brake lines so the brakes clamp at the wheels. The inner seal inside the cylinder helps hold that pressure where it belongs.
On affected Accent vehicles, the master cylinder body was not machined correctly. Sharp edges inside the part can cut or wear the inner oil seal. Once that seal is damaged, hydraulic pressure drops and braking performance is reduced. The replacement part uses a properly machined master cylinder body, so the seal is not exposed to the same sharp edge.
The warning sign Hyundai lists is the brake system MIL, or brake warning light, turning on. A lower brake pedal or weaker brake response is also consistent with the defect Hyundai investigated.
Who's affected?
| 2021 Hyundai Accent | hydraulic brake system |
|---|---|
| Units affected | 76 |
| Field incidents | NHTSA has logged 1 field incident to date. |
Not every 2021 Hyundai Accent sedan is on the list. Check your VIN to confirm whether your specific sedan is included.
What's the safety risk?
Reduced braking performance can mean longer brake pedal travel and more distance needed to stop, increasing the risk of a crash. If the brake system MIL illuminates, treat it as a warning sign and schedule the recall repair soon. Repair is free at any franchised Hyundai dealer.
What should I do?
- Check your VIN to confirm your 2021 Hyundai Accent is included in this recall.
- Contact a franchised Hyundai dealer to schedule the free brake master cylinder replacement that addresses reduced braking performance.
- Bring the recall notice if Hyundai mailed one. If not, reference recall number 21V937 when you call.
- Drive cautiously until the repair is complete. Leave extra stopping distance and avoid hard braking when traffic allows.
What happens at the repair
At the dealer, a Hyundai technician replaces the brake master cylinder. The recall repair is free, including parts and labor. This addresses the master cylinder condition that can damage the inner oil seal and reduce braking performance. Hyundai will provide reimbursement under the reimbursement plan it submitted. If you already paid for a related brake master cylinder repair, contact Hyundai customer service and bring repair paperwork or payment documentation so the claim can be reviewed.
| Reimbursement | Reimbursement available |
|---|
Timeline
| December 2, 2021 | NHTSA published the recall |
|---|---|
| January 26, 2022 | Owner notification mailed |
| January 28, 2022 | Dealer notification began |
| January 28, 2022 | Dealer notification ended |
| January 28, 2022 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 21V937?
Recall 21V937 covers 76 2021 Hyundai Accent vehicles with a brake master cylinder that was manufactured with sharp edges. Those edges can damage the inner oil seal, reducing braking performance, lengthening brake pedal travel, and increasing crash risk. Hyundai dealers will replace the brake master cylinder for free.
What should I do if my 2021 Hyundai Accent is on this recall?
Check your VIN to confirm your specific Accent is included in recall 21V937. If it is, contact a franchised Hyundai dealer to schedule the brake master cylinder replacement. Reference recall number 21V937000 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Hyundai's remedy says dealers will replace the brake master cylinder free of charge at any franchised Hyundai dealer.
Is it safe to drive my 2021 Hyundai Accent before the recall repair?
The recall does not include a do not drive order. The safety risk is reduced braking performance, longer brake pedal travel, or more distance needed to stop. If the brake pedal feels longer or braking feels weaker, stop driving and call a Hyundai dealer for guidance.
When were owners notified about recall 21V937?
Hyundai mailed owner notification letters on February 10, 2022. Used vehicle owners and anyone who missed the letter should still check the VIN, because the VIN decides whether this specific 2021 Accent is included.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V937000 |
|---|---|
| Hyundai customer service | 1-855-371-9460 |
| NHTSA recall # | 21V937 |
| NHTSA recall # (full) | 21V937000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (PDF)
- Download Recall Document (PDF) (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 20, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →