Recall 24V447 affects 24 2024 Mack Md (Electric) trucks for a loose high-voltage cable. Do not drive. Free repair at a franchised Mack dealer.
A loose high voltage cable can cause a sudden loss of steering and drive power, increasing the risk of a crash. Do not drive the vehicle, even for short trips, until the remedy is complete. There is no warning before failure. Ask Mack about towing if the truck must move. Repair is free at any franchised Mack dealer.
Mack is recalling 24 2024 Mack Md (Electric) vehicles because an incorrectly assembled high voltage connector can let the high voltage cable loosen. A loose cable can cause sudden loss of steering and drive power, increasing crash risk. Do not drive an affected vehicle until a Mack dealer completes the free repair.
Does this recall apply to your specific vehicle?
The official, free per-VIN recall check is run by NHTSA. Enter your VIN and we'll forward you directly — and add you to a free watchlist so you hear about new recalls for your vehicle.
Check my VIN at NHTSARecallNotify doesn't check your VIN — NHTSA's official tool does. We use your email only to alert you to new recalls.
Watch this vehicle for recalls
Add it to your free watchlist and we will alert you as new federal recalls are posted for your year, make and model. New-recall alerts are rolling out now.
You are on the watchlist.
We will email you as new federal recalls are posted for your vehicle.
What's wrong?
The high voltage connector on the 2024 Mack Md (Electric) is part of the Electrical Storage System, the battery system that stores power for the electric propulsion system. The connector holds the high voltage cable in place so power stays connected while the truck is in normal use. A mechanical lock is supposed to click into position and keep that cable from working loose.
On affected trucks, the connector was assembled incorrectly because the operator training was not enough to ensure the lock was secured. If that lock is not fully engaged, the high voltage cable can loosen from the connector. The repaired connector has the lock properly engaged, which restores the intended cable retention.
There is no warning sign before failure. The connection can loosen before the driver has a clear symptom, so owners should not wait for the truck to act differently before taking the recall seriously.
Who's affected?
| 2024 Mack Md (Electric) | electric propulsion system |
|---|---|
| Units affected | 24 |
| 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 in this recall.
What's the safety risk?
A loose high voltage cable can cause a sudden loss of steering and drive power, increasing the risk of a crash. Do not drive the vehicle, even for short trips, until the remedy is complete. There is no warning before failure. Ask Mack about towing if the truck must move. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2024 Mack Md (Electric) is included in this recall.
- Do not drive the truck until the high-voltage connector-lock repair is complete.
- Arrange a tow if the truck must be moved to the dealer; do not drive it there yourself.
- Contact a franchised Mack dealer to schedule the free high-voltage connector-lock inspection and repair that secures the high-voltage cable.
- Bring the recall notice if you have it. If not, reference recall number 24V447 and Mack recall SC0467 when you call.
What happens at the repair
At the dealer, a Mack technician inspects the mechanical connector lock for the high voltage connector and repairs it as needed so the lock engages and the cable stays secure. Do not drive the vehicle until this recall repair is complete. The inspection, repair, parts, and labor are free under recall 24V447. If you already paid for this connector lock repair, 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
| June 16, 2024 | NHTSA published the recall |
|---|---|
| June 21, 2024 | Dealer notification began |
| June 21, 2024 | Dealer notification ended |
| July 10, 2024 | Owner notification mailed |
| August 2, 2024 | VIN-searchable in NHTSA's database — Check your VIN to see whether this recall applies to your specific vehicle. |
| August 2, 2024 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 24V447?
Recall 24V447 covers 24 2024 Mack Md (Electric) vehicles with an incorrectly assembled high voltage connector. The mechanical connector lock can fail to engage properly, letting the high voltage cable loosen. Mack dealers will inspect and repair the connector lock for free.
What should I do if my 2024 Mack Md (Electric) is on this recall?
Check your VIN to confirm your specific vehicle is included in recall 24V447. If it is included, do not drive the vehicle until the remedy is complete. Contact a franchised Mack dealer and reference recall SC0467 when you call.
Is the recall repair free?
Yes. Federal recall law requires the manufacturer to repair the defect at no cost, and Mack dealers will inspect and repair the mechanical connector lock as needed for free.
What does "Do not drive" mean for this recall?
Do not drive the vehicle until a Mack dealer completes the inspection and any needed repair. This applies to short trips as well. A loose high voltage cable can cause sudden loss of steering and drive power, so ask the dealer how the vehicle should be moved.
When did Mack notify owners about recall 24V447?
Mack mailed owner notification letters on July 10, 2024. If you bought the vehicle used or never received the letter, check your VIN and call Mack customer service at 1-800-866-1177 with recall SC0467.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/24V447000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 24V447 |
| NHTSA recall # (full) | 24V447000 |
Source documents
-
Download Quarterly Report (PDF) - Download Owner Notification Letter (PDF)
- Download Recall Investigation Document (PDF) (PDF)
- Download Recall Report (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 →