Recall 11V209 affects 808 2009-2011 Mack Cxu, Chu, and Pinnacle trucks for fifth-wheel mounting bolts. Repair is free at any franchised Mack dealer.
Mack is recalling 808 2009-2011 Cxu, Chu, Pinnacle (Chu), and Pinnacle (Cxu) heavy trucks because interference at the fifth-wheel mounting bolts can keep the bolts from being torqued to specification. If those bolts fail, the fifth wheel can come loose and let the trailer separate from the tractor, increasing crash risk; the Mack dealer repair will be free once available.
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What's wrong?
The fifth wheel assembly on 2009-2011 Mack Cxu, Chu, Pinnacle (Chu), and Pinnacle (Cxu) heavy trucks is the hitch plate that connects the trailer to the truck. It carries the trailer coupling load and transfers that load into the frame through mounting bolts. Those bolts need the specified torque so the fifth wheel stays clamped tightly to the frame during hauling.
On affected trucks, there is interference around the bolts used to secure the fifth wheel to the frame. That interference prevents the bolts from being tightened to specification. When the bolts are under-torqued, the mount is not held with the clamping force Mack intended, which weakens the connection between the fifth wheel assembly and the truck frame.
There is no warning sign before failure. A driver should not count on a noise, looseness, or dashboard alert to appear before the fifth wheel mounting problem becomes serious.
Who's affected?
Covers the Cxu, Chu, Pinnacle (Chu), and Pinnacle (Cxu) truck lines across 2009-2011, all tied to the fifth wheel assembly.
| 2010 Mack Cxu | Fifth wheel assembly |
|---|---|
| 2009 Mack Chu | Fifth wheel assembly |
| 2011 Mack Pinnacle (Chu) | Fifth wheel assembly |
| 2009 Mack Cxu | Fifth wheel assembly |
| 2010 Mack Chu | Fifth wheel assembly |
| 2011 Mack Pinnacle (Cxu) | Fifth wheel assembly |
| Units affected | 808 |
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?
Failed fifth wheel bolts can let the trailer come loose from the tractor, separating the trailer and increasing crash risk. If your VIN is included, schedule the bolt inspection and replacement promptly and drive cautiously until the dealer completes it. Repair will be free at any franchised Mack dealer once available.
What should I do?
- Check your VIN to confirm your 2009-2011 Mack Cxu, Chu, Pinnacle (Chu), or Pinnacle (Cxu) is included in this recall.
- Contact a franchised Mack dealer and reference recall number 11V209 to ask whether the fifth-wheel bolt inspection and replacement is open for your VIN.
- Ask the dealer to inspect the fifth-wheel mounting bolts and replace bolts that were not torqued to specification.
- Bring the recall notice if Mack mailed one, along with any service records tied to the fifth-wheel assembly.
- Drive cautiously until the repair is complete. Avoid hauling a trailer if the dealer has not confirmed the fifth-wheel bolts are secure.
What happens at the repair
At the dealer, a Mack technician inspects the bolts that secure the fifth wheel to the frame. If the bolts were blocked from being tightened to specification, the technician replaces the affected bolts as required. The recall repair is free, with parts and labor covered. The remedy notice says the safety recall began on May 30, 2011, so ask the Mack service desk to confirm the recall work is still open for your VIN.
Timeline
| March 31, 2011 | NHTSA published the recall |
|---|---|
| May 30, 2011 | Owner notification mailed |
Frequently asked questions
What is recall 11V209?
Recall 11V209 covers 808 2009-2011 Mack Cxu, Chu, Pinnacle (Chu), and Pinnacle (Cxu) heavy trucks with fifth wheel mounting bolts that were not torqued to specification. If those bolts fail, the fifth wheel can come loose and the trailer can separate from the tractor, increasing crash risk. Mack dealers inspect and replace the bolts for free.
What should I do if my 2009-2011 Mack Cxu, Chu, Pinnacle (Chu), or Pinnacle (Cxu) is on this recall?
Check your VIN to confirm your specific truck is included in recall 11V209. If it is, contact a franchised Mack dealer to schedule the fifth wheel bolt inspection. Reference recall number 11V209 when you call. The dealer will replace affected bolts as required for free.
Does the recall repair cost anything?
No. Federal recall law requires manufacturers to repair safety defects at no cost, and Mack's remedy says dealers will inspect and replace the fifth wheel bolts as required free of charge at any franchised Mack dealer.
What is the safety risk?
The safety risk is trailer separation. The fifth wheel connects the trailer to the tractor, so loose or failed mounting bolts can let that assembly come loose. If the trailer separates from the tractor, crash risk increases. Have a Mack dealer inspect the bolts and complete the free repair.
What if I bought this Mack truck used?
The free recall repair still applies. Recall coverage follows the VIN, not the first owner. Check your VIN to confirm whether your specific truck is included in recall 11V209, then call a franchised Mack dealer and ask for the fifth wheel bolt inspection.
More information
| NHTSA campaign page | nhtsa.gov/vehicle-recalls/11V209000 |
|---|---|
| Mack customer service | 1-800-866-1177 |
| NHTSA recall # | 11V209 |
| NHTSA recall # (full) | 11V209000 |
Source documents
-
Download Recall Investigation Document (PDF) (PDF) - Download Recall Document (PDF) (PDF)
- Download Owner Notification Letter (PDF)
- Download Owner Notice (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 →