2009 Mack Cxu problems, complaints & recalls
Most-reported problem areas: Trailer Hitches (2) · Suspension (1)
Safety recalls (3)
Electrical System 2014-02-21 · campaign 14V078000 · 70,208 vehicles
Defect: Mack Trucks, Inc. (Mack) notified the agency on February 20, 2014, that they are recalling certain model year 2010-2012 CHU, CXU, GU and TD vehicles manufactured from June 16, 2009, through July 8, 2011. While continuing to research the scope of the issue, Mack expanded the recall on November 18, 2014 to include certain model year 2008-2009 and 2013-2014 CHU, CXU, GU and TD vehicles manufactured from June 16, 2009, through July 8, 2011. Having completed its investigation, Mack once again expa
Risk: Deposits of contaminants may result in the circuits being bridged, creating a high resistance short, increasing the risk of a fire.
Fix: Mack has notified owners, and dealers will inspect the EPDM. If contamination has occurred, dealers will replace the EPDM and address the leak, free of charge. Owners of model year 2010-2012 CHU, CXU, GU and TD vehicles were initially notified April 24, 2014. Owners affected by the recall expansions were notified in February 2015. Owners may contact Mack Trucks at 1-336-393-2000. Mack's number for this recall is SC0375.
Exterior Lighting:fog Lights 2012-09-06 · campaign 12V434000 · 3,864 vehicles
Defect: Mack is recalling certain model year 2007-2010 CHU and CXU vehicles, manufactured from October 13, 2006, through December 23, 2009 and equipped with daytime running lights and fog lights. A short in the fog light circuit may cause the low beam headlight circuit to cut out.
Risk: If the low beam headlights go out, the driver may lose visibility, increasing the risk of a crash.
Fix: Mack will notify owners, and install an additional wiring harness on the affected vehicles, free of charge. The safety recall began on November 14, 2012. Owners may contact Mack Trucks at 1-800-866-1177.
Trailer Hitches:fifth Wheel Assembly 2011-03-31 · campaign 11V209000 · 808 vehicles
Defect: MACK TRUCKS IS RECALLING CERTAIN MODEL YEAR 2008-2011 CHU AND CXU HEAVY TRUCKS MANUFACTURED FROM JANUARY 2008 THROUGH JULY 2010. THERE MAY BE AN INTERFERENCE WITH THE BOLTS USED TO SECURE THE FIFTH WHEEL TO THE FRAME THAT CAN PREVENT THE BOLTS FROM BEING TORQUED TO SPECIFICATION.
Risk: THE BOLTS MAY FAIL AND COULD RESULT IN THE FIFTH WHEEL COMING LOOSE CAUSING THE TRAILER TO SEPARATE FROM THE TRACTOR INCREASING THE RISK OF A CRASH.
Fix: DEALERS WILL INSPECT AND REPLACE THE BOLTS AS REQUIRED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON MAY 30, 2011. OWNERS MAY CONTACT MACK TRUCKS AT 1-800-866-1177.
Service bulletins (176)
Technical service bulletins are repair instructions manufacturers send dealers for known issues. Unlike recalls, the fix is not automatically free — but naming the bulletin at the service desk can save diagnosis time and support goodwill repairs.
Power Train 2026-04-09 · CBR 2573-1 202604 · Service Bulletin/Repair Instructions
cbr - mack chassis - through shaft bearing retainer breakage on mack carriers.
Power Train 2026-04-09 · CBR 2362-3 202604 · Service Bulletin/Repair Instructions
cbr - mack carrier nut adhesive change.
Vehicle Speed Control 2026-01-08 · CBR 820-9 202601 · Service Bulletin/Repair Instructions
cbr - mack chassis - engine brake only works with the brake pedal, no function during cruise. us07 and newer emissions, model year 2008 and newer.
Electrical System 2025-07-28 · CBR 2488 072025 · Service Bulletin/Repair Instructions
cbr - a significant gps reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit gps location data.
Service Brakes 2025-07-17 · CBR 407 072025 · Service Bulletin/Repair Instructions
cbr - to correct the mid136 sid 66 fmi 7 fault code the latest bendix vcp file will need to downloaded.
Engine 2025-05-28 · CBR 170-8 202505 · Service Bulletin/Repair Instructions
inactive code p25ae00 being generated after a hard pull and a momentary drop in engine oil pressure (low oil pressure) (possible related codes - spn4811 , spn 100 , pid 100)
Showing the 6 most recent of 176 bulletins. Search all of them free at nhtsa.gov.
What owners report
2011-07-24 · Suspension · 303,175 mi“ on tuesday, july 19 of 2011, i observed that the 5th wheel bolts on abf unit number 19223 were loose enough to be turned by hand. the bolts are not being interfered with by the huck rivets below them. the nuts are prevailing torque lock nuts and are not loose on the bolts. the bolts have stretched under load. i was going to show the unit to the di…”
2010-10-03 · Trailer Hitches“some of the 2008, many of the 2009, and almost all of the 2010 model mack trucks used by abf freight system were built and delivered with weak bolts holding the 5th wheel coupler to the frame. on 27 sept 2010, unit 19212 was in the shop for routine repairs. a mechanic noticed that all of the bolts on the right side were loose enough to rattle in…”
2010-09-23 · Trailer Hitches · 179,708 mi“ my coworker was changing the oil on a 2009 mack and i happened to notice that the 5th wheel plate was shifting around on the frame. i applied a box end wrench to the mount bolts and discovered that all ten of the fasteners holding the 5th wheel to the frame could be turned easily using one hand. that is not my idea of being securely attached! no a…”
Excerpts of consumer complaints filed with NHTSA, lightly truncated. They are owner statements, not verified findings.