Recall 23V731 covers 12 2024 Mack Granite (Gr) and Terrapro (Te) vehicles for loose rear lifting brackets. Free repair at franchised Mack dealers once available.
Mack is recalling 12 2024 Granite (Gr) and Terrapro (Te) vehicles because an insufficiently secured rear lifting bracket on the engine cylinder head can detach. If that bracket separates while the engine is being lifted, the engine can fall or swing and increase injury risk; the Mack dealer repair will be free once available.
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What's wrong?
The rear lifting bracket on the 2024 Mack Granite (Gr) and Terrapro (Te) is bolted to the engine cylinder head. That bracket gives technicians a secure attachment point for lifting or handling the Cummins L9N engine, so the fasteners have to clamp the bracket tightly against the head.
On affected trucks, the flanged studs used on the rear lifting bracket were 30mm long instead of the required 25mm. A stud that is too long can bottom out in the threaded hole before it clamps the bracket. That leaves the bracket with too little clamping force, and the bracket can loosen or detach from the cylinder head.
There is no warning sign before failure. The issue is in the stud length and clamp load, so an owner is not given a dashboard light or driving symptom before the bracket separates.
Who's affected?
Covers both Mack truck lines tied to the same engine flanged stud.
| 2024 Mack Granite (Gr) | Engine |
|---|---|
| 2024 Mack Terrapro (Te) | Engine |
| Units affected | 12 |
| 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 rear lifting bracket that detaches while the engine is being lifted can let the engine fall or swing, increasing injury risk for anyone nearby. There is no warning sign before the bracket problem shows up, so contact a Mack dealer before any engine lifting work. Repair will be free at any franchised Mack dealer once available.
What should I do?
- Check your VIN to confirm your 2024 Mack Granite (Gr) or Terrapro (Te) is included in this recall.
- Contact Mack customer service at 1-800-866-1177 to confirm when the dealer inspection is open.
- Reference recall number 23V731 and Mack recall SC0452 when you call.
- Contact a franchised Mack dealer after Mack confirms the free rear-lifting-bracket flanged-stud inspection and replacement are open.
- Avoid lifting the engine until the rear lifting bracket is inspected; a detached bracket can let the engine fall or swing.
What happens at the repair
Mack's remedy is still being developed, so do not assume the final dealer work is open for scheduling yet. Once it opens, a Mack technician will inspect the flanged stud in the rear lifting bracket and replace it as needed. Parts and labor will be covered under the recall. Mack's standard reimbursement plan covers documented out-of-pocket repairs tied to this defect. Bring repair paperwork and payment records to the dealer or contact Mack customer service to start the claim.
| Reimbursement | Reimbursement available |
|---|
Timeline
| October 31, 2023 | NHTSA published the recall |
|---|---|
| November 22, 2023 | Dealer notification began |
| November 22, 2023 | Dealer notification ended |
| December 9, 2023 | Owner notification mailed |
| December 15, 2023 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 23V731?
Recall 23V731 covers 12 2024 Mack Granite (Gr) and Terrapro (Te) trucks. The rear lifting bracket attached to the engine cylinder head can be insufficiently secured and detach while the engine is being lifted, creating an injury risk. Mack dealers will inspect and replace the flanged stud for free.
What should I do if my 2024 Mack Granite (Gr) or Terrapro (Te) is on this recall?
Check your VIN to confirm your specific truck is included in recall 23V731. If it is, call a franchised Mack dealer and ask for recall SC0452. The dealer will inspect the rear lifting bracket and replace the flanged stud as needed at no cost.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost. For recall 23V731, Mack dealers will inspect the rear lifting bracket and replace the flanged stud as needed free of charge.
What is the safety risk?
The risk is injury during engine lifting. If the rear lifting bracket detaches while the engine is being lifted, the engine can fall or swing. That is why the bracket and flanged stud need dealer inspection before the truck is serviced in a way that lifts the engine.
When were owners notified about recall 23V731?
Mack mailed owner notification letters on December 9, 2023. If you bought the truck used or never received the letter, the VIN check still decides whether your 2024 Mack Granite (Gr) or Terrapro (Te) is included.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/23V731000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 23V731 |
| NHTSA recall # (full) | 23V731000 |
Source documents
-
Download Recall Report (PDF) - Download Owner Notification Letter (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 →