Recall 23V310 affects 5 2024 Mack Lr garbage trucks because the horn circuit is missing. Repair is free at any franchised Mack dealer.
Mack is recalling 5 2024 Lr garbage trucks because a missing circuit leaves the electric horn inoperative. Without a working horn, the driver cannot alert other drivers and the crash risk rises; Mack dealers will complete the free repair.
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What's wrong?
The electric horn on a 2024 Mack Lr garbage truck is the sound device the driver uses to alert people nearby and other road users. The horn button on the steering wheel sends an electrical signal through the steering column harness, which is the bundle of wires inside the column. That wiring path has to be complete for the horn to sound when the driver presses the button.
On affected trucks, the steering column harness has the wrong circuits installed. The circuit connecting the horn button to the horn is missing, so pressing the button does not send power to the horn. Mack traced the issue to an engineering review of harness changes that did not catch the missing wiring path.
There is no warning sign before failure. The owner or driver will only know the horn is not working by pressing the horn button and finding that it does not sound.
Who's affected?
| 2024 Mack Lr | electrical system |
|---|---|
| Units affected | 5 |
| 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 truck.
What's the safety risk?
An inoperative horn leaves you without a basic way to warn other drivers, which increases the risk of a crash. There is no warning sign before the horn fails, so confirm the recall by VIN and schedule the dealer repair soon. Repair is free at any franchised Mack dealer.
What should I do?
- Check your VIN to confirm your 2024 Mack Lr is included in this recall.
- Contact your nearest franchised Mack dealer to schedule the free horn-circuit repair that reconnects the horn button to the horn.
- Bring the recall notice if Mack mailed one. If not, reference recall number 23V310 when you call.
- Use extra caution until the repair is complete; the horn cannot alert other drivers if it is inoperative.
What happens at the repair
At the dealer, a Mack technician adds the missing circuits that connect the horn button to the horn, then confirms the horn operates from the horn button. The recall repair is free, with parts and labor covered. Mack's reimbursement plan covers documented out of pocket costs tied to this recall. If you already paid for a horn circuit repair before the recall work, bring the repair order and payment records to the service desk and ask how to submit them under Mack's plan.
| Reimbursement | Reimbursement available |
|---|
Timeline
| May 2, 2023 | NHTSA published the recall |
|---|---|
| May 5, 2023 | Dealer notification began |
| May 5, 2023 | Dealer notification ended |
| June 20, 2023 | Owner notification mailed |
| June 27, 2023 | Interim owner notification (was planned for this date) |
Frequently asked questions
What is recall 23V310?
Recall 23V310 covers 5 2024 Mack Lr electric garbage trucks with electric horns. The horn button circuit is missing, so the horn does not work and the driver cannot alert other road users. Mack dealers will add the needed circuits for free.
What should I do if my 2024 Mack Lr is on this recall?
Check your VIN to confirm your specific 2024 Mack Lr is included in recall 23V310. If it is, contact a franchised Mack dealer and ask for recall SC443, the horn circuit repair. The dealer adds the missing circuits free of charge.
Is the recall repair free?
No. Federal recall law requires manufacturers to repair the defect at no cost. Mack will add the necessary horn button and horn circuits free of charge at any franchised Mack dealer, regardless of where the truck was purchased.
What is the safety risk?
The safety risk is that the horn does not work. A driver who cannot sound the horn cannot alert other drivers, pedestrians, or workers nearby, which increases crash risk. Mack fixes the missing horn circuit for free at a franchised Mack dealer.
When did Mack mail owner letters for this recall?
Mack mailed owner notification letters on June 20, 2023. If you bought the truck used or did not receive a letter, check your VIN and reference recall 23V310 or Mack recall SC443 when you call a franchised Mack dealer.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/23V310000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 23V310 |
| NHTSA recall # (full) | 23V310000 |
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 →