Problems owners report
Complaints filed with NHTSA about the 2007 Mack CHN, by the system named in each complaint. One complaint can name several.
- Engine and engine cooling1
NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 0 injuries and 0 deaths reported
Fatal crashes in the US
From 2020 to 2023, 6 2007 CHN vehicles were involved in crashes on US public roads in which someone died; 1 person died inside them. This is a count, not a crash rate: it grows with the number of cars on the road.
NHTSA Fatality Analysis Reporting System (FARS), crash years 2020–2023 (public domain)
New York safety inspections
At its first New York inspection the 2007 Mack CHN failed the safety check 1.43% of the time — 41% less often than the average 2007 passenger car (2.42%). Median odometer at inspection: 365,814 miles.
NY DMV Vehicle Inspections (vezn-fmmk), initial inspections since Aug 2021 · how we count
Recalls in Canada
12 Transport Canada recalls for the 2007 Mack CHN.
| 2007339 19 Oct 2007 | Other On certain trucks, the fifth wheel hitch assembly's lever arm may have been incorrectly installed during the manufacturing process. The lever arm pivot bolt ma… |
| 2007278 28 Aug 2007 | Brakes On certain trucks, the engine configuration makes servicing fuel injection lines difficult when using traditional tools. It is possible for fuel leaks to devel… |
| 2007264 14 Aug 2007 | Brakes On certain vehicles, the internal rubber check valve inside the Bendix SR-7 spring brake modulating valve can become deformed over time. The effect of this def… |
| 2007265 14 Aug 2007 | Brakes On certain school and transit buses, the Parker single check valve (SCV) that connects with the supply port of the Bendix SR-7 spring brake modulating valve may… |
| 2007102 28 Mar 2007 | Fuel System On certain trucks, sleeves installed as a result of repairs associated with safety recall SC0317 (Transport Canada number 2006258) may chafe the fuel injection … |
| 2007083 16 Mar 2007 | Other On certain trucks, the axle housing may have been manufactured with steel that was out of specification (9.5mm thick instead of 11mm thick), which could result … |
| 2007022 29 Jan 2007 | Steering On certain trucks, the nut that retains the steering wheel may not have been installed, which may result in a loss of steering control and a crash. Correction:… |
| 2006258 10 Oct 2006 | Fuel System On certain trucks, a leak in the fuel injection line may spray fuel on the Exhaust Gas Recirculation (EGR) pipes. The hot EGR pipes could ignite the fuel, caus… |
| 2006231 19 Sept 2006 | Brakes On certain vehicles, the brake cam tubes on the steer and drive axles may not have been greased during vehicle assembly. As a result, the brake cam journal may… |
| 2006187 28 Jul 2006 | Fuel System On certain vehicles, the fuel line crossover bracket may fail. Such a failure could allow the bracket to fall from the vehicle and damage a drive axle tire. C… |
| 2006180 17 Jul 2006 | Brakes On certain vehicles, the air brake fittings may unexpectedly separate from the plastic housing. If the push-to-connect cartridge that supplies the air to the p… |
| 2006156 19 Jun 2006 | Brakes Certain trucks equipped with Bendix SR-7 spring brake modulating valve may experience an internal air leak if the check valve fails to seat. This may cause a de… |
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada
Recalls
ON CERTAIN TRUCKS EQUIPPED WITH A SAF HOLLAND SIMPLEX FIFTH WHEEL, THE LEVER ARM PIVOT BOLT MAY HAVE BEEN OVER TIGHTENED. AN OVER TIGHTENED PIVOT BOLT CAN DISTORT THE PIVOT BOLT SPACER SLEEVE, WHICH MAY PREVENT THE FIFTH WHEEL LATCH JAW FROM CLOSING AND LATCHING SECURELY AROUND THE TRAILER KING PIN.
ON CERTAIN TRUCKS EQUIPPED WITH ASET AC MODEL ENGINES, THE ENGINE AS CONFIGURED WITH AN EXTERNAL EXHAUST GAS RECIRCULATION SYSTEM MAKES SERVICING THE FUEL INJECTION LINES DIFFICULT WHEN USING TRADITIONAL TOOLS. THEREFORE, IT IS POSSIBLE FOR FUEL LEAKS TO DEVELOP WHEN REMOVING AND INSTALLING THE FUEL INJECTION LINES.
ON CERTAIN TRUCKS EQUIPPED WITH PARKER SINGLE CHECK VALVES (SCV) PROVIDED BY BENDIX. THE DEFECT EXISTS IN THE PARKER SCV THAT CONNECTS WITH THE SUPPLY PORT OF THE SR-7 SPRING BRAKE MODULATING VALVE. AFTER PROLONGED USE OF THE PARKER SCV, THE VALVE BODY RETAINER MAY BECOME EXCESSIVELY WORN AND EVENTUALLY BREAK APART. PIECES OF THE PARKER SCV CAN BECOME LODGED INSIDE THE SR-7 SPRING BRAKE MODULATING VALVE, POTENTIALLY CAUSING EITHER LEAKAGE OUT OF THE SR-7 VALVE OR PREVENTING AIR FROM PROPERLY EXHAUSTING FROM THE SR-7 VALVE.
ON CERTAIN TRUCKS EQUIPPED WITH BENDIX SR-7 SPRING BRAKE MODULATING VALVES, THE INTERNAL RUBBER CHECK VALVE MAY LEAK CAUSING A DELAY IN THE APPLICATION OF THE SPRING BRAKES TO PARK THE VEHICLE AFTER THE OPERATOR PULLS THE DASH VALVE BUTTON.
CERTAIN TRUCKS WERE RECALLED FOR THE INSTALLATION OF SLEEVES ON THE FUEL INJECTION LINE AS REQUIRED BY SAFETY RECALL SC0317 (NHTSA RECALL NO. 06V392). THERE IS A POSSIBILITY THAT THE NEW SLEEVES MAY CHAFE THE FUEL INJECTION LINE.
ON CERTAIN TRUCKS, THE AXLE HOUSINGS MAY HAVE BEEN MANUFACTURED WITH STEEL THAT WAS OUT OF SPECIFICATION WHICH COULD RESULT IN A FATIGUE FAILURE OVER TIME.
ON CERTAIN TRUCKS, THE NUT THAT RETAINS THE STEERING WHEEL MAY NOT HAVE BEEN INSTALLED.
ON CERTAIN TRUCKS, A LEAK IN THE ASET AC FUEL INJECTION LINE MAY SPRAY FUEL ON THE EXHAUST GAS RECIRCULATION PIPES THAT CARRY HOT EXHAUST GASES .
ON CERTAIN TRUCKS, THE BRAKE CAM TUBES ON THE STEER AND DRIVE AXLES MAY NOT HAVE BEEN GREASED.
ON CERTAIN TRUCKS, THE FUEL LINE CROSSOVER BRACKET MAY PREMATURELY FAIL AND UNEXPECTEDLY FALL TO THE ROAD. THE LOCATION AND SIZE OF THE BRACKET DRAWS A CONCERN TO THE BRACKET BEING PICKED UP AND THROWN BY THE DRIVE AXLE WHEELS.
ON CERTAIN TRUCKS EQUIPPED WITH A LEGRIS AIR MANIFOLD, THE BRASS PUSH-TO-CONNECT CARTRIDGE MAY UNEXPECTEDLY SEPARATE FROM THE PLASTIC HOUSING.
ON CERTAIN TRUCKS EQUIPPED WITH SR-7 BENDIX BRAKE VALVES, THE CHECK VALVE INSIDE THE VALVE CAVITY MAY NOT PROPERLY SET, CAUSING INTERNAL AIR LEAKAGE. IF THE CHECK VALVE DOES NOT PROPERLY SEAT, THE RESULTING LEAKAGE CAN CAUSE A DELAY IN THE APPLICATION OF THE SPRING BRAKES TO PARK THE VEHICLE AFTER OPERATOR PULLS THE DASH VALVE BUTTON.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Mack told its dealers about the 2007 Mack CHN: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 11008366 | CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded. |
| 11003042 | CBR - Accelerator Pedal: Inspection Instructions |
| 10251329 | CBR - Automated Manual Transmission ( AMT ) Flywheel Pilot Bearing Wear On Input Shaft. |
| 10246086 | TSB: Mack Trucks now offer an improved HD Inter-Axle Through Shaft for the CRD 125, 150, 180, and 200 family carriers. The new HD shaft went into production on January 23rd, 2023 for 2.54 - 3.50 axle ratios and April 1st, 2023 for 3.56 - 3.98 ratios. The new HD through shaft is an upgrade over the current standard shaft and can now be used as a replacement part instead of the standard shaft. The new HD shaft has a new design to increase strength, longevity and life over the standard shaft. |
| 10241946 | TSB: Barksdale Leveling Valve, Leak Test |
| 10237342 | CBR: Diagnostic Trouble Code (DTC) P215A-64, Fault Code SPN 84 FMI 19 |
| 10237339 | CBR: eWarranty To UCHP Labor Code ( SCC Code ) Crossover, Conversion Information For Use With Campaigns ( FI, PI ) And Recalls ( EC, SC ), Location On Trucks Dealer Portal ( TDP ) |
| 10222608 | TSB-Charge Air Cooler t-clamp install. |
| 10219108 | 2009 Document reformatted to be published as a TSB in Impact. Fan Drive Belt Replacement MP7 Engine |
| 10219104 | 2009 Document reformatted to be published as a TSB in Impact. DRV Air Line Service Kit |
| 10219059 | 2007 Document reformatted to be published as a TSB in Impact. Updated Crossmember for improved clearance. |
| 10219058 | 2008 Document reformated to be published as a TSB in Impact. Frame reinforcement plate. |
| 10219057 | 2008 Document reformatted to be published as a TSB in Impact. Rear Suspension Repair. |
| 10215315 | Programming Failure - Chassis With Cummins Engine And An Allison Transmission |
| 10215312 | (Back Office) - Cruise Control Inoperative After Updating Software VECU5 Without ESP Package (UESP). |
| 10215295 | Warranty Automated Manual Transmission ( AMT, I-Shift, mDrive ) Control Housing Assembly; Guidelines For Filing A Claim For Chassis Return Visit With Transmission Issues After A Repair Requiring Control Housing Removal And Reinstallation - US07 And N. |
| 10215289 | Automated Manual Transmission ( AMT ) I-Shift / mDRIVE - Ribbon Harness Replacement - Speed Sensor Bolts, Possible Fault Codes P1058 - 21 Or MID 130 PID 161 FMI 1 |
| 10215287 | US10 Emission Engines - Diagnostic Trouble Code ( DTC ) SPN 1231 FMI 9 Troubleshooting. |
| 10213658 | Emcon (Spark Assist) Engine Aftertreatment System Troubleshooting Check Sheet - US07 Emissions |
| 10213652 | Low Oil Pressure Diagnostic Process For 11 Liter Engines |
| 10213644 | Premium Tech Tool ( PTT ) Training Materials And Support Tools |
| 10213642 | No Start Condition After Over The Air Programing - VECU5 No Start "Safe State" |
| 10213641 | Temperature Sensor Troubleshooting Guide - US10+OBD13 And Newer |
| 10213640 | Electronically Controlled Suspension (ECS) Losing Air Pressure |
| 10213639 | Low Voltage Disconnect (LVD), Function Description |
NHTSA manufacturer communications (public domain)