Recall 11V374 affects 2,294 2009-2012 Mack Mru heavy trucks for loose steering gear bolts. Repair is free at any franchised Mack dealer.
Mack recall 11V374 covers 2,294 2009-2012 Mru heavy trucks because the steering gear mounting bolts were not tightened to specification. If the bolts loosen, the steering gear can disconnect from its bracket and cause complete loss of steering, increasing crash risk; the Mack dealer repair will be free once available.
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What's wrong?
The steering gear on 2009-2012 Mack Mru heavy trucks is the gear box that turns steering input into movement at the front wheels. It sits on a mounting bracket and has to stay fixed in place so the steering linkage moves when the driver turns the wheel. The mounting bolts hold that gear box against the bracket under vibration, load, and repeated steering force.
On affected Mru trucks, those steering gear mounting bolts were not tightened to Mack's specification during assembly. Loose bolts can back out farther as the truck is driven. Over time, the steering gear can separate from its mounting bracket, which means the wheel input is no longer held in the intended position at the gear box.
There is no warning sign before failure. A driver should not count on noise, looseness, or a dashboard warning to appear before the steering gear disconnects from its bracket.
Who's affected?
Spans 4 model years, all tied to the steering gear.
| 2009 Mack Mru | steering gear |
|---|---|
| 2010 Mack Mru | steering gear |
| 2011 Mack Mru | steering gear |
| 2012 Mack Mru | steering gear |
| Units affected | 2,294 |
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?
This recall involves a complete loss of steering, which can leave the driver without normal control and increase the risk of a crash. Until your VIN is checked, drive cautiously, avoid unnecessary trips, and ask a Mack dealer what repair timing applies. Repair will be free at any franchised Mack dealer once available.
What should I do?
- Check your VIN to confirm your 2009-2012 Mack Mru is included in this recall.
- Contact your nearest franchised Mack dealer and ask whether the free steering-gear bolt replacement that secures the gear to its mounting bracket is open for your VIN.
- Reference recall number 11V374 when you call so the service desk can find the correct repair.
- Bring the recall notice if Mack mailed one, or bring your VIN and recall number if you do not have the notice.
- Drive cautiously until the repair is complete. Leave extra room and stop the truck if the steering feels loose or abnormal.
What happens at the repair
Once the repair is available for your VIN, a Mack technician replaces the steering gear mounting bolts and tightens the new bolts to the correct specification. Parts and labor are free under the recall. The work addresses bolts that were not tightened correctly where the steering gear mounts to its bracket. Ask the Mack dealer to confirm parts and scheduling before arranging service for the truck.
Timeline
| July 20, 2011 | NHTSA published the recall |
|---|---|
| September 19, 2011 | Owner notification mailed |
Frequently asked questions
What is recall 11V374?
Recall 11V374 covers 2,294 2009-2012 Mack Mru heavy trucks with steering gear mounting bolts that were not tightened to specification. Loose bolts can let the steering gear disconnect from its mounting bracket. Mack dealers replace the bolts and tighten them correctly for free.
What should I do if my 2009-2012 Mack Mru is on this recall?
Check your VIN to confirm your specific truck is included in recall 11V374. If it is, contact a franchised Mack dealer to schedule the steering gear bolt replacement. Reference recall number 11V374 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires manufacturers to repair safety defects at no cost, and Mack's remedy states that dealers replace the steering gear mounting bolts free of charge. Parts and labor are covered at a franchised Mack dealer.
What is the safety risk in recall 11V374?
The safety risk is a complete loss of steering, which increases crash risk under recall 11V374. The problem starts with steering gear mounting bolts that loosen over time. If your VIN is included, schedule the free bolt replacement with a Mack dealer.
What if I bought this Mack Mru used?
The free recall repair still applies. Federal recall law follows the vehicle, not the first owner. Check your VIN to confirm whether your 2009-2012 Mack Mru is included, then call a franchised Mack dealer with recall number 11V374.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/11V374000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 11V374 |
| NHTSA recall # (full) | 11V374000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Defect / Noncompliance Notice (PDF) (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on June 2, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →