Recall 21V840 affects 995 2021 Hyundai Palisade SUVs for contaminated brake fluid that reduces braking performance. Repair is free at any franchised Hyundai dealer.
Hyundai is recalling 995 2021 Palisade SUVs under recall 21V840 because contaminated brake fluid can swell seals inside the brake master cylinder and reduce braking performance. Longer stopping distance increases crash risk, and Hyundai dealers will complete the recall repair free of charge.
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What's wrong?
The brake master cylinder assembly in the 2021 Hyundai Palisade turns brake pedal movement into hydraulic pressure for the brake system. That pressure pushes brake fluid through the lines so the brakes clamp and slow the vehicle. The seals inside the master cylinder have to hold pressure every time the pedal is pressed.
On affected Palisades, the brake fluid was contaminated with mineral oil. That contamination causes the master cylinder inner-cup seals to swell, which keeps the master cylinder from building normal internal pressure. When that pressure drops, the brake pedal can feel low or spongy and braking performance is reduced.
The brake system malfunction indicator light can turn on before the problem is found. Owners also reported a low or spongy brake pedal, which is a warning sign that the system is not holding normal brake pressure.
Who's affected?
Both brake-system listings point to the same brake master cylinder assembly and part number 58510-C5070.
| 2021 Hyundai Palisade | hydraulic brake system |
|---|---|
| 2021 Hyundai Palisade | hydraulic brake system |
| Units affected | 995 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and model does not guarantee inclusion. Check your VIN to confirm whether this recall applies to your specific SUV.
What's the safety risk?
Reduced braking performance lengthens stopping distance and increases crash risk. If the brake system warning light comes on, slow down, leave extra stopping room, and arrange dealer service. Repair is free at any franchised Hyundai dealer.
What should I do?
- Check your VIN to confirm your 2021 Hyundai Palisade is included in this recall.
- Contact your nearest franchised Hyundai dealer to schedule the free brake-fluid flush and brake master cylinder replacement that addresses the contaminated fluid and swollen seals.
- Bring the recall notice if Hyundai mailed one. If not, reference recall number 21V840 when you call.
- Leave extra following distance and avoid hard braking until the repair is complete.
What happens at the repair
At the dealer, a Hyundai technician replaces the brake master cylinder and flushes the brake fluid to remove the contaminated fluid from the braking system. The recall repair is available now, and parts and labor are free. Hyundai has a reimbursement plan for owners who already paid for this repair before the recall notice. Bring receipts and any repair paperwork to the service desk so Hyundai can review the documented expense under that plan.
| Reimbursement | Reimbursement available |
|---|
Timeline
| October 27, 2021 | NHTSA published the recall |
|---|---|
| December 22, 2021 | Dealer notification began |
| December 22, 2021 | Dealer notification ended |
| December 22, 2021 | Interim owner notification (was planned for this date) |
| December 24, 2021 | Owner notification mailed |
Frequently asked questions
What is recall 21V840?
Recall 21V840 covers 995 2021 Hyundai Palisade vehicles with a brake-fluid contamination defect. The contaminated fluid can swell the brake master cylinder inner-cup seals and reduce braking performance, which increases crash risk. Hyundai dealers will replace the brake master cylinder and flush the brake fluid for free.
What should I do if my 2021 Hyundai Palisade is on this recall?
Check your VIN to confirm your specific Palisade is included in recall 21V840. If it is, contact a franchised Hyundai dealer to schedule the brake master cylinder replacement and brake fluid flush. Reference Hyundai recall number 212 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, and Hyundai's remedy says dealers will replace the brake master cylinder and flush the brake fluid free of charge at any franchised Hyundai dealer.
What is the safety risk?
The safety risk is reduced braking performance. If the brake master cylinder seals swell, the vehicle needs more distance to stop, increasing crash risk. Confirm your VIN, then arrange the free repair with a Hyundai dealer before relying on the vehicle for regular driving.
When were owners notified about recall 21V840?
Hyundai mailed owner notification letters on December 24, 2021. If you bought the Palisade used or never received a letter, the VIN still decides whether the recall applies. Check your VIN, then call Hyundai customer service at 1-855-371-9460 or a franchised Hyundai dealer.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/21V840000 |
|---|---|
| Hyundai customer service | 1-855-371-9460 |
| NHTSA recall # | 21V840 |
| NHTSA recall # (full) | 21V840000 |
Source documents
-
Download Recall Document (PDF) (PDF) - Download Quarterly Report (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 →