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Service bulletin CBR-2139 202405

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11000831
Published by NHTSA2024-06-04
Manufacturer's numberCBR-2139 202405
Manufacturer's date2024-05-02
NHTSA componentFUEL/PROPULSION SYSTEM; ENGINE

NHTSA's summary

CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil. It is possible that the source of the fuel is the rear fuel galley plug in the cylinder head. A new and improved fuel galley plug has been developed to resolve this issue.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Engine, Fuel system

Vehicles listed
MACK ANTHEM (AN)2017
MACK ANTHEM (AN)2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
MACK CXU2006 to 2018
MACK GRANITE (GR)2019, 2020, 2021, 2022, 2023, 2024, 2025 (the catalog's model; the bulletin names a series or trim of it)
MACK GRANITE (GU)2007 to 2016
MACK GRANITE (GU)2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it)
MACK LEU2007 to 2017
MACK LR2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023, 2024, 2025
MACK MRU2007
MACK MRU2011 to 2018
MACK TE2019 to 2025
MACK TERRAPRO (TE)2017, 2018 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
25V2560002025-04-17. ENGINE AND ENGINE COOLING:ENGINE:DIESEL
20235882023-10-31. Engine
23V7310002023-10-31. ENGINE
15V7020002015-10-26. ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
TSB M-913-001 2026092026-10-02. Service bulletin. Parker engine-mounted hydraulic pump service bulletin.
S4533 2026082026-09-02. Service campaign. Mack Trucks has determined that certain AN model trucks equipped with an MP8 Turbo Compound (TC) engine may experience TC Double Idler Gear failure due to incorrect bearing preload. TC units within this population are suspected to be affected, which could result in failure and potential engine damage. For the affected vehicle population, please follow the instructions provided below to remove the TC unit, replace the double idler gear with a new one, and reinstall the TC unit.
M0304 EC0033 2026062026-06-29. Emissions. Mack Trucks has determined that certain vehicles equipped with a model year (“MY”) 2017-2018 MP8 Turbo Compound (TC) engine may not meet California and Federal Regulations (CARB). This Recall is for updated software that will reduce the amount of time necessary for the system to operate in a cold engine warm-up strategy and provide health monitoring of the Selective Catalyst Reduction (SCR).
CBR-2592-1 2026062026-06-29. Service bulletin. The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With intermittent loss of throttle.
M0039 0320262026-04-02. Emissions. Emissions - EC0039 MST21 Failure to Detect P20EE - AN, CHU.
S4342 0220262026-03-03. Service campaign. SC - Mack Trucks has determined that a select group of trucks were built with an AHI Module fuel pressure sensor which does not meet our specifications.
M0302 0220262026-03-03. Emissions. Emissions - Mack Trucks has determined that certain vehicles equipped with a model year (“MY”) 2017-2018 MP7 engine may not meet California and Federal Regulations (CARB).
CBR 820-9 2026012026-02-03. Service bulletin. CBR - Mack Chassis - Engine Brake Only Works With The Brake Pedal, No Function During Cruise. US07 And Newer Emissions, Model Year 2008 And Newer.
CBR 2128-7 2026012026-02-03. Service bulletin. CBR - Engine Control Module (EMS) Software Information - Improvement List (Change Log), US21+OBD2021 Emissions ONLY
CBR 2107-22 2026012026-02-02. Service bulletin. CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4) and PR(4)).