ClaimRight · Warranty Denial Guides
Mack Anthem (An) warranty claim denied?
419 manufacturer communications on file
4 warranty extensions / campaigns 2016–2025 model years covered
If your Mack Anthem's warranty claim was just denied, that denial is a dealership's opinion — not necessarily the end of the road. NHTSA records show the manufacturer has filed 419 service communications for this model, including 4 formal warranty extensions covering the Fuel Control Module, Pre-SCR NOx Sensor, and EGR Cooler. Separate bulletins also document patterns such as oil leaks at the clutch/flywheel housing, rear main oil seal leaks on 13L engines, and timing gear plate repairs on Mack chassis. These filings mean the manufacturer has already acknowledged certain recurring issues exist on vehicles like yours, even when an individual dealer denies a specific claim.
Denials are frequently based on an initial, incomplete review and can sometimes be reconsidered when supported by the right documentation — repair history, inspection records, and the manufacturer's own published bulletins. A free assessment compares your Anthem's VIN, mileage, and repair history against these documented issues to show what options may be available to you, with no obligation and no upfront cost.
What Mack has documented for the Anthem (An)
Filed with NHTSA by the manufacturer. Warranty extensions are the strongest signal — the manufacturer acknowledging a defect and extending coverage for it.
2023-09-28 · U111 202309
Warranty extension Owner Notification Letter, Extended Warranty Coverage U111. The Fuel Control Module is the component provided coverage under this warranty extension.
Official NHTSA document →
2023-09-28 · U112 202309
Warranty extension Owner Notification Letter, Extended Warranty Coverage U112. The Pre-SCR NOx Sensor is the component provided coverage under this warranty extension.
Official NHTSA document →
2023-09-28 · U113 202309
Warranty extension Owner Notification Letter, Extended Warranty Coverage U113. The Pre-SCR NOx Sensor is the component provided coverage under this warranty extension.
Official NHTSA document →
2023-09-28 · U114 202309
Warranty extension Owner Notification Letter, Extended Warranty Coverage U114. The EGR Cooler is the component provided coverage under this warranty extension.
Official NHTSA document →
2024-11-14 · CBR-997 202411
Vehicles may present with oil leak coming from the clutch/flywheel housing and observation of burned clutch smell or clutch slipping. These symptoms can be mistaken as a crankshaft...
Official NHTSA document →
2024-11-06 · CBR-2417 202411
CBR - 11L Engine block compatibility and Backward Conversion Parts Requirements
Official NHTSA document →
2024-10-01 · M0296 202410
Emission Recall - Mack Trucks has determined that certain vehicles equipped with a model year (“MY”) 2022-2024 MP8 model engines, may be equipped with an improper engine software c...
Official NHTSA document →
2024-09-20 · CBR-570 202409
CBR: US17 GHG Common Rail Fuel System Component Electrical Faults - Model Year 2017 To 2024
Official NHTSA document →
2024-09-19 · CBR-2376 202409
CBR: Drivers Information Display (DID) Inoperative/Goes Blank During Vehicle Operation
Official NHTSA document →
2024-09-16 · CBR-731 202409
CBR: Automated Manual Transmission (AMT) Model D or F (mDrive and I-Shift, AMT-D, AMT-F) - Transmission Oil Leakage From Transmission Input Shaft Seal Or Output Shaft Seal - US10 A...
Official NHTSA document →
2024-09-13 · CBR-407 202409
CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded.
Official NHTSA document →
2024-09-10 · CBR-471 202409
CBR: The procedure to eliminate the Mack Chassis "Air Restriction Light On" seen in the cluster is to confirm that the parameter YYT is set to "Enable" with Premium Tech Tool.
Official NHTSA document →
2024-09-02 · CBR-2387 202409
CBR: Vehicles Equipped With A Lift Axle - Wheel Speed Fault Code SPN 793, SPN 794 Set When Axle Is Up
Official NHTSA document →
2024-08-29 · S0310 202408
Service Campaign: Mack trucks has determined that certain AN, GR, PI, TE, and LR model trucks built with TGW3 have stopped communicating after production.
Official NHTSA document →
Common questions
Can a denied Mack Anthem warranty claim be reconsidered?
Yes, in many cases a denial can be reviewed again, particularly when additional documentation is provided — such as repair orders, inspection reports, or reference to manufacturer bulletins covering the same component. Dealers sometimes deny claims based on limited initial information. Gathering records that tie your symptoms to a documented issue can support a request for reconsideration, though outcomes depend on the specific facts of each case.
What do the Mack Anthem Owner Notification Letters U111–U114 cover?
These four warranty extensions, issued 2023-09-28, provide extended coverage for specific components: the Fuel Control Module (U111) and EGR Cooler (U114), plus two extensions addressing the Pre-SCR NOx Sensor (U112, U113). If your Anthem has experienced failures involving these parts, it's worth checking whether your VIN falls within the extension's eligible mileage and age window, since coverage terms vary by letter.
What should I do if my dealer denies a claim related to an oil leak or EGR/NOx component?
Start by requesting a written copy of the denial reason and keeping all repair orders and diagnostic notes. Compare the described symptoms to published manufacturer bulletins, such as those covering clutch/flywheel oil leaks or EGR-related components, since matching documentation can strengthen a follow-up request. A free assessment can help identify which bulletins or extensions may apply to your specific vehicle and repair history.
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