Recall 15V607 affects 3,776 2011-2014 International Prostar, Transtar, and Lonestar trucks for fifth-wheel lock damage. Repair is free at any franchised International dealer.
International is recalling 3,776 2011-2014 Prostar, Transtar, and Lonestar trucks because Fontaine Ultra LT fifth wheel connectors can suffer cumulative damage that prevents the locking mechanism from operating or engaging properly. If the lock fails, the trailer can detach from the tractor and raise crash risk; International dealers will complete the recall repair free of charge.
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What's wrong?
The fifth wheel on 2011-2014 International Prostar, Transtar, and Lonestar trucks is the trailer hitch assembly mounted behind the cab. It locks around the trailer kingpin so the tractor and trailer stay coupled while the truck turns, brakes, and pulls under load. The lock has to close fully across the throat of the fifth wheel to hold that connection.
On affected trucks equipped with Fontaine Ultra LT fifth wheels, cumulative damage can keep the locking mechanism from operating or fully engaging. The damage is tied to coupling and maintenance problems over time, including high coupling, missed visual inspections, coupling when the fifth wheel is not fully open and ready, and missed maintenance. When the lock is damaged, the trailer connection is not secure.
Before failure, drivers or fleet operators can see damage during inspection. Look for bent operating handles, wedge guides, locking wedges, and locking jaws. Severe damage can leave the lock short of the full throat of the fifth wheel, and the driver can feel excessive slack in the fifth wheel connection while operating the truck.
Who's affected?
Covers Prostar, Transtar, and Lonestar trucks across the 2011-2014 model years, with the fifth wheel assembly as the shared component.
| 2011 International Prostar | Fifth wheel assembly |
|---|---|
| 2012 International Transtar | Fifth wheel assembly |
| 2011 International Transtar | Fifth wheel assembly |
| 2012 International Lonestar | Fifth wheel assembly |
| 2012 International Prostar | Fifth wheel assembly |
| 2013 International Transtar | Fifth wheel assembly |
| 2013 International Lonestar | Fifth wheel assembly |
| 2013 International Prostar | Fifth wheel assembly |
| 2014 International Prostar | Fifth wheel assembly |
| 2014 International Lonestar | Fifth wheel assembly |
| Units affected | 3,776 |
The year and model narrow the scope, but the VIN decides. Check your VIN to confirm whether your specific truck is included.
What's the safety risk?
A damaged Ultra LT fifth wheel locking mechanism can fail to hold the trailer as intended. The trailer can detach from the tractor, increasing crash risk. Inspect for bent operating handles, damaged wedge guides, locking wedges, locking jaws, and excessive slack before use, especially after improper coupling. Schedule the repair soon. Repair is free at any franchised International dealer.
What should I do?
- Check your VIN to confirm your 2011-2014 International Prostar, Transtar, or Lonestar is included in this recall.
- Contact your nearest franchised International dealer to schedule the free Fontaine Ultra NT fifth-wheel replacement that fixes the damaged locking mechanism.
- Bring the recall notice if Navistar mailed one. If not, reference recall number 15V607 when you call.
- Keep the truck out of trailer service until the fifth-wheel repair is complete.
What happens at the repair
At the dealer, an International technician replaces the Fontaine Ultra LT fifth wheel with an Ultra NT model fifth wheel. The work addresses cumulative damage to the fifth wheel and locking mechanism by replacing the connector assembly named in recall 15V607. Parts and labor are covered under the recall, so the repair is free for included trucks. Schedule the truck with an International dealer and ask the service desk to confirm that the replacement fifth wheel is the Ultra NT model.
Timeline
| September 28, 2015 | Dealer notification began |
|---|---|
| September 28, 2015 | Interim owner notification (was planned for this date) |
| September 29, 2015 | NHTSA published the recall |
| October 2, 2015 | Dealer notification ended |
| November 18, 2015 | Owner notification mailed |
Frequently asked questions
What is recall 15V607?
Recall 15V607 covers 3,776 2011-2014 International Prostar, Transtar, and Lonestar trucks with Fontaine Ultra LT fifth wheel connectors. Damage to the fifth wheel and locking mechanism can stop the lock from engaging correctly, allowing the trailer to detach. Fontaine dealers replace the fifth wheel for free.
What should I do if my 2011-2014 International Prostar, Transtar, or Lonestar is on this recall?
Check your VIN to confirm your specific truck is included in recall 15V607. If it is, contact International customer service or a franchised International dealer and ask for the Fontaine Ultra LT fifth wheel replacement. Reference recall 15V607 when you call. The repair is free.
Is the recall repair free?
Yes. Federal recall law requires the recall repair to be performed at no cost, and Navistar's remedy says Fontaine dealers will replace the affected Ultra LT fifth wheel with an Ultra NT model fifth wheel free of charge.
What is the safety risk?
The safety risk is trailer separation. If the fifth wheel and locking mechanism are damaged enough, the lock can fail to operate as intended, and the trailer can unexpectedly detach from the tractor. That increases crash risk until the fifth wheel is replaced.
What if I bought my International truck used?
The free recall repair still applies. Recall eligibility follows the VIN, not the current owner or where the truck was purchased. Check your VIN, then reference recall 15V607 when you call an International dealer or International customer service at 1-800-448-7825.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/15V607000 |
|---|---|
| International customer service | 1-800-448-7825 |
| NHTSA recall # | 15V607 |
| NHTSA recall # (full) | 15V607000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Owner Notification Letter (PDF)
- Download Recall Report (PDF)
- Download Quarterly Report (PDF)
- Download Recall Acknowledgement (PDF)
This article is generated from NHTSA's primary recall filings and reviewed against the source on May 31, 2026. RecallNotify does not paraphrase NHTSA's consequence language; that text is reproduced as written above. Editorial standards →