Recall 24V167 affects 117 2024 Mack Md vehicles for an incorrect park brake pressure switch. Repair is free at any franchised Mack dealer.
Mack is recalling 117 2024 Md trucks under recall 24V167 because an incorrect park brake pressure switch can make the park brake light show the wrong brake status. The light can show the park brake is applied when it is not, which raises the risk of a vehicle rollaway and crash; Mack dealers will replace the switch free of charge.
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What's wrong?
The park brake pressure switch on a 2024 Mack Md truck tells the truck whether the parking brake is applied or released. That signal feeds the park brake indicator light on the dash, so the driver can compare the control valve position with the brake status before moving the truck.
On affected trucks, the wrong pressure switch was installed after the supplier shipped the wrong part to Mack manufacturing. The switch sends the opposite status to the dash light. When the park brake is applied, the light says it is not applied. When the park brake is released, the light says it is applied.
Owners can see the warning sign at the dash before the truck is driven. The park brake dash control valve and the actual brake status do not match the applied or released light. Cruise control will not set, and the daytime running lights shut off when the park brake is released.
Who's affected?
| 2024 Mack Md | Indicator light |
|---|---|
| Units affected | 117 |
| 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 your specific truck is included.
What's the safety risk?
A park brake light that shows the brake is applied when it is not can let the vehicle roll away and increase crash risk. If the park brake light conflicts with actual brake status, cruise control will not set, or daytime running lights shut off after release, use extra care and schedule service soon. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2024 Mack Md is included in this recall.
- Contact a franchised Mack dealer to schedule the free brake pressure switch inspection and replacement that corrects the park brake light status.
- Bring the recall notice if Mack mailed one. If not, reference recall number 24V167 when you call.
- Confirm the park brake is fully applied before leaving the truck until the dealer completes the repair.
- Call Mack customer service at 1-800-866-1177 with questions, and reference Mack recall SC0460.
What happens at the repair
At the dealer, a Mack technician inspects the brake pressure switch and replaces it if the switch is incorrect or fails inspection. The recall repair is free, with parts and labor covered. If you already paid out of pocket for this recall repair before the owner notice, Mack's standard reimbursement plan covers documented expenses. Bring repair paperwork to the service desk or contact Mack customer service for claim instructions.
| Reimbursement | Reimbursement available |
|---|
Timeline
| March 1, 2024 | NHTSA published the recall |
|---|---|
| March 8, 2024 | Dealer notification began |
| March 8, 2024 | Dealer notification ended |
| March 11, 2024 | Owner notification mailed |
| April 26, 2024 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 24V167?
Recall 24V167 covers 117 2024 Mack Md vehicles with a park brake indicator issue. An incorrect park brake pressure switch can make the light show the park brake is applied when it is not, creating rollaway risk. Mack dealers will inspect and replace the switch for free.
What should I do if my 2024 Mack Md is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 24V167. If it is, contact a franchised Mack dealer to schedule the park brake pressure switch inspection. The dealer will replace the switch as needed, free of charge.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair recall defects at no cost, and Mack will inspect and replace the park brake pressure switch as needed free of charge at a franchised Mack dealer.
What is the safety risk?
The risk is vehicle rollaway. The park brake light can show that the park brake is applied when it is not, which increases crash risk if the driver relies on the incorrect indicator. Confirm your VIN and schedule the free dealer inspection if your vehicle is included.
When were owners notified about recall 24V167?
Mack mailed owner notification letters on March 11, 2024. If you bought the vehicle used or never received a letter, check your VIN to confirm whether your specific 2024 Mack Md is included, then reference recall 24V167 when you call the dealer.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/24V167000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 24V167 |
| NHTSA recall # (full) | 24V167000 |
Source documents
-
Download Quarterly Report (PDF) - Download Recall Report (PDF)
- Download Owner Notification Letter (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Owner Notice (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 →