Recall 25V026 affects 21 2024-2025 Mack Pioneer Pr (4) and Pinnacle (Pi/Pn) trucks for undersized air tanks. Repair is free at any franchised Mack dealer.
Mack is recalling 21 2024-2025 Pioneer Pr (4) and Pinnacle (Pi/Pn) trucks because the air tanks do not hold enough air for the brake system. Insufficient air volume can reduce braking performance and increase the risk of a crash; Mack dealers will complete the recall repair free of charge.
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What's wrong?
The compressed-air tank on the 2024-2025 Mack Pioneer Pr (4) and Pinnacle (Pi/Pn) trucks stores the pressurized air used by the service brake system. In an air-brake truck, that stored air is the reserve the system draws from when the driver applies the brakes and when the system needs enough capacity for repeated brake applications. The affected tank is an 8.1L compressed-air tank.
On these trucks, the problem is not a cracked tank or an air leak. Mack found that an air-volume calculation table used the wrong baseline for a subset of vehicles, so certain builds were fitted with less air storage than required by Federal Motor Vehicle Safety Standard 121. The repair is to install new air tanks that increase the available air volume for the brake system.
There is no warning sign before failure. Mack reported no warnings associated with this issue, so the VIN check and dealer inspection decide whether a truck is included.
Who's affected?
Covers two Mack truck models from the 2024 and 2025 model years, both using the same compressed-air tank.
| 2025 Mack Pioneer Pr (4) | brake system |
|---|---|
| 2024 Mack Pinnacle (Pi/Pn) | brake system |
| Units affected | 21 |
| Field incidents | NHTSA has logged no field incidents to date. |
A matching year and Mack model does not confirm inclusion. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
Insufficient air volume reduces braking performance and increases the risk of a crash. There is no warning sign before this issue affects braking, so confirm whether your VIN is included and schedule the recall repair soon. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm whether your 2024-2025 Mack Pioneer Pr (4) or Pinnacle (Pi/Pn) is included in this recall.
- Contact a franchised Mack dealer to schedule the free correct-volume air tank installation that restores the brake system's required air supply.
- Bring the recall notice if Mack mailed one, or reference recall number 25V026 when you call.
- Drive cautiously until the repair is complete. Leave extra following distance and avoid hard braking.
- Call Mack customer service at 1-800-866-1177 with questions and mention Mack recall SC0473.
What happens at the repair
At the dealer, a Mack technician installs the correct volume air tanks for the brake system. The recall repair is available now, and parts and labor are free of charge. If you have already paid out of pocket for this air tank repair before the recall notice, Mack's standard reimbursement plan covers documented expenses. Bring the repair order, proof of payment, and any related paperwork to the service desk or contact Mack customer service about the claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| January 21, 2025 | NHTSA published the recall |
|---|---|
| January 28, 2025 | Dealer notification began |
| January 28, 2025 | Dealer notification ended |
| February 10, 2025 | Owner notification mailed |
| March 17, 2025 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 25V026?
Recall 25V026 covers 21 2024-2025 Mack Pioneer Pr (4) and Pinnacle (Pi/Pn) trucks with air tanks that do not hold enough air for the brake system. Mack dealers will install the correct volume air tanks free of charge.
What should I do if my 2024-2025 Mack Pioneer Pr (4) or Pinnacle (Pi/Pn) is on this recall?
Check your VIN to confirm your specific truck is included in recall 25V026. If it is, contact a franchised Mack dealer to schedule installation of the correct volume air tanks. Reference Mack recall number SC0473 when you call. The repair is free.
Is the recall repair free?
Yes. Mack's recall remedy says dealers will install the correct volume air tanks free of charge. Federal recall law requires the manufacturer to provide the recall repair at no cost at a franchised Mack dealer.
What is the safety risk?
The safety risk is reduced braking performance. The recalled trucks have insufficient air volume for the brake system, which can increase crash risk. If your VIN is included, schedule the free air tank repair with a Mack dealer.
When were owners notified about recall 25V026?
Mack mailed owner notification letters on February 10, 2025. If you bought the truck used or did not receive a letter, check your VIN and call Mack customer service at 1-800-866-1177 or a franchised Mack dealer with recall number SC0473.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/25V026000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 25V026 |
| NHTSA recall # (full) | 25V026000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notification Letter (PDF)
- Download Misc. Document (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Recall Report (PDF)
- Download Recall Acknowledgement (PDF)
- Download Owner Notice (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 →