NHTSA campaign 15V644000 · Mack campaign SC0395
Mack Recall 15V-644: Fifth Wheel Locking Mechanism may not Engage
- Recall influenced by NHTSA's Office of Defects Investigation
NHTSA recall 15V644000 (Mack campaign SC0395) was reported by Mack Trucks, Inc. on October 13, 2015, with 448 vehicles potentially affected (per NHTSA). NHTSA's record lists the Mack PINNACLE (CHU) and Mack PINNACLE (CXU) for model years 2011–2014. Owners were notified on November 18, 2015, per NHTSA.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 15V644000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 15V644000 (also written 15V-644 or 15V644)
- Filed by
- Mack Trucks, Inc.
- Mack campaign number
- SC0395
- Report received
- Potentially affected
- 448 vehicles (per NHTSA)
- Component
- Trailer Hitches — Fifth Wheel Assembly
- Owners notified
Repair completion: 21.88% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 15V644000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
NHTSA's recall notice
As NHTSA's recall record states it for campaign 15V644000.
Defect description
Mack Trucks, Inc. (Mack) is recalling certain model year 2011-2014 Pinnacle (CHU and CXU) trucks manufactured September 10, 2010, to June 17, 2013. The affected trucks are equipped with Fontaine Ultra LT Fifth Wheel connectors, which, due to cumulative damage to the fifth wheel and its locking mechanism, have a locking mechanism that may fail to operate or to properly engage.
Safety consequence
If the fifth wheel and locking mechanism are sufficiently damaged, the locking mechanism may fail to operate as intended and the trailer may unexpectedly detach from the tractor, increasing the risk of a crash.
Manufacturer remedy
Mack will notify owners, and Fontaine dealers will replace the fifth wheel with an Ultra NT model fifth wheel, free of charge. The recall began on November 18, 2015. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0395.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Sources
Official NHTSA notice for recall 15V644000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.