TSB M257005 202608
Service Bulletin/Repair Instructions
Loose CCV mounting bolts and oil leak at CCV due to cracking of the housing. Mounting hardware found to be under-torqued after the vehicle was delivered.
Vehicle report
2025 MACK PIONEER PR (4)
Service bulletins
150 bulletinsTechnical service bulletins are instructions a manufacturer sent its dealers about a known fault. They are not recalls and the work is usually not free, but they are the clearest signal of a problem the manufacturer already knows about.
CBR 2599 202608
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide support for complaints of trailer braking aggressively.
CBR 2429 202608
Service Bulletin/Repair Instructions
This CBR solution outlines the procedures for diagnosing, replacing, calibrating, and programming Flexible Switch Panels and the Security and Cab Interface Module (SCIM) to resolve switch malfunction notifications and associated fault codes.
CBR 2596 202608
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide steps on how to correct a customer complaint of a no crank/engine start condition.
TSB M-590-001 072026
Service Bulletin/Repair Instructions
TSB - Wheel Speed Sensor Fitting And Cable Clamping.
CBR 2585-3 072026
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is to provide support for fault codes C106718 and/or C106818.
CBR-2590-2 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide steps on how to correct a customer complaint of instrument cluster going dark (blackout) situation.
CBR-2591-1 202606
Service Bulletin/Repair Instructions
The purpose of this CBR it to provide release notes for the recent Engine ECU software.
CBR-2496-16 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is outline the interim software solution for PR(4) and AN(4).
CBR-2568-5 202606
Service Bulletin/Repair Instructions
Contact Workshop; Communication Lost With Ultracapacitor Message With Associated CCIOM DTC U100687 And A Startability Issue.
CBR-2587-2 202606
Service Bulletin/Repair Instructions
The purpose of this cbr is to provide steps on how to protect the alternator power cable connection from corrosion.
CBR-2586-1 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to address issues of exhaust stack rotation on version 4 products.
CBR 2456-6 202605
Service Bulletin/Repair Instructions
Infotainment Update for Missing Apps, Navigation, and Apple/Android CarPlay Issues
CBR-2465-7 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to help diagnosis issues with the Proactive Engine Restart system and Hood Open popup message.
CBR-2588-2 202606
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide aid in VMCU fault B1524-49 along with a Rain sensor which will not calibrate.
CBR 2465-6 202605
Service Bulletin/Repair Instructions
CBR to diagnosis issues with the Proactive Engine Restart system and Hood Open message.
GDC26-02 202605
Service Bulletin/Repair Instructions
Fault diagnostic information for Supplemental Restraint / Airbag Inflation System (SRS)
CBR 2587-1 202605
Service Bulletin/Repair Instructions
CBR to provide steps on how to protect the alternator power cable connection from corrosion.
CBR 2583-1 202605
Service Bulletin/Repair Instructions
Tire Pressure Monitoring System U101A / U101B Fault Solution
CBR 2496-14 202605
Service Bulletin/Repair Instructions
CBR to address when you should update to 3.0 service pack software update.
CBR 2585-1 202605
Service Bulletin/Repair Instructions
CBR to provide support for fault codes C106718 and/or C106818.
CBR 2584-4 202605
Service Bulletin/Repair Instructions
Electronically controlled suspension (ECS) calibration procedure.
CBR 2502-7 202605
Service Bulletin/Repair Instructions
Mack Chassis - Battery Sensor Diagnostic, Calibration, and Configuration Procedure
CBR 2441-8 2026 202604
Service Bulletin/Repair Instructions
CBR - Key Fob Calibration and/or Replacement.
CBR 2568-3 202604
Service Bulletin/Repair Instructions
CBR - Communication Lost With Ultracapacitor Message With Associated CCIOM DTC U100687 and a Startability Issue.
GDC26-001 202604
Over The Air
GDC - Transmission Oil Level Sensor
CBR 2574 202604
Service Bulletin/Repair Instructions
CBR - Manual TPMS Wheel Sensor Calibration.
CBR 2562-15 202604
Service Bulletin/Repair Instructions
CBR - Electric Pneumatic Module (EPM) Fault
CBR 2569-3 202604
Service Bulletin/Repair Instructions
CBR - Brake Pad Wear Indicator DTC C107E68.
CBR 2540-7 202604
Service Bulletin/Repair Instructions
CBR - Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
CBR 2362-3 202604
Service Bulletin/Repair Instructions
CBR - Mack Carrier Nut Adhesive Change.
CBR 2573-1 202604
Service Bulletin/Repair Instructions
CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR 2570-1 032026
Service Bulletin/Repair Instructions
CBR - EBS - Electro-Pneumatic Module - Signal Compare Failure DTC C109562 - AN (4) - PR.
CBR 2712-7 032026
Service Bulletin/Repair Instructions
CBR - No Start Condition After Over the Air Programing.
CBR 2564-1 032026
Service Bulletin/Repair Instructions
CBR - Check Radar Pop Up Message.
CBR 2565-1 032026
Service Bulletin/Repair Instructions
CBR - Trailer, 12Volt Right/Left Direction Indicator Circuit Warning - AN (4) - PR.
S4808 032026
Service Campaign
SC - Certain model PR’s could experience grille surround trim detaching due to insufficient retention.
S4866 032026
Service Campaign
SC - Load Lock Clamp Install
CBR 2514 022026
Service Bulletin/Repair Instructions
CBR - This procedure provides a temporary corrective action for the “Lost Communication to Alternator” message and Vehicle Master Control Unit (VMCU) DTC C103508 caused by a software issue.
S4757 022026
Service Campaign
SC - Certain model AN(4)’s and PR’s could experience DEF leaks or crystallization due to the installation of incorrect fasteners for the Urea Dosage Valve.
CBR 2522-5 202601
Service Bulletin/Repair Instructions
CBR - Frequent Parked Regeneration Requests - Models PR (4), AN (4).
CBR 2443-3 202601
Service Bulletin/Repair Instructions
CBR - Trailer Tandem Adjustment Procedure - PR (4) - AN (4).
CBR 2496-9 202601
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is outline the interim software solution for PR(4) and AN(4).
CBR 2399-9 202601
Service Bulletin/Repair Instructions
CBR - Daycab Cab Roof Antenna Misalignment Causing Water Intrusion.
CBR 2548-1 202601
Service Bulletin/Repair Instructions
CBR - Shock Interference With “Z” Springs.
CBR 2540-5 202601
Service Bulletin/Repair Instructions
CBR - Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
CBR 2408-16 202601
Service Bulletin/Repair Instructions
CBR - Air Production Modulator (APM) DTC C10129B - High/Excessive Flow - PR (4).
CBR 2545-1 202601
Service Bulletin/Repair Instructions
CBR - U114688 VMCU Communication Fault - AN (4) - PR (4).
CBR 2502-2 202601
Service Bulletin/Repair Instructions
CBR - Mack Chassis - Battery Sensor Diagnostic and Calibration Procedure - PR (4) - AN (4).
CBR 2516-6 202601
Service Bulletin/Repair Instructions
CBR - CMS Black Screen Troubleshooting - PR (4) - AN (4).
SC S4742 202601
Service Campaign
CBR MCO/VECI Label Reprint.
CBR 2540 202512
Service Bulletin/Repair Instructions
Upper Bunk Restraint System – Plastic Gable Retention Field Fix
CBR 2542 202512
Service Bulletin/Repair Instructions
This document provides mandatory interim parameter settings to ensure proper vehicle operation.
CBR 2526 202512
Service Bulletin/Repair Instructions
The purpose of this CBR is to address driver complaint of parking heater inoperative.
CBR 2535 202512
Service Bulletin/Repair Instructions
The purpose of this CBR is to address reports of regeneration failure when ambient temperature is below 30F.
CBR 2532-1 202511
Service Bulletin/Repair Instructions
CBR - Automatic High Beam PR(4) - AN(4).
CBR 2496-5 202511
Service Bulletin/Repair Instructions
CBR - Mack Chassis - PR (4) - AN (4) - B2_T2_2.0.
CBR 2016-18 202511
Service Bulletin/Repair Instructions
CBR - Frame or Cab Lean.
CBR - 2528-1 202511
Service Bulletin/Repair Instructions
CBR - Mack Chassis - PR (4) - Pioneer Bug Screen Hitting Bumper.
CBR 2514-2 202511
Service Bulletin/Repair Instructions
CBR - Lost Communication to Alternator Message - DTC C103508.
CBR 2518-2 202511
Service Bulletin/Repair Instructions
CBR - Load Lock Clamp Breaking - PR(4).
CBR 2526-4 202511
Service Bulletin/Repair Instructions
CBR - Parking Heater Inoperative - PR(4) - AN (4).
CBR 2408-15 202511
Service Bulletin/Repair Instructions
CBR - Air Production Modulator (APM) DTC C10129B - High/Excessive Flow PR(4).
CBR 2525-2 202511
Service Bulletin/Repair Instructions
CBR - Exhaust Leak or Noise – Turbo Compound (TC) Bolt Inspection and Repair - PR (4).
CBR 2527-1 202511
Service Bulletin/Repair Instructions
CBR - Center Chassis Input Output Module(CCIOM) Fault Code U3000-94 - PR(4)
CBR 2467-5 202511
Service Bulletin/Repair Instructions
CBR - Service Required Message PR(4), AN(4).
CBR 2521-1 202511
Service Bulletin/Repair Instructions
CBR - Xantrex Inverter Sub-hardware Mismatch.
CBR 2516-3 102025
Service Bulletin/Repair Instructions
CBR - CMS Black Screen Troubleshooting.
CBR 2480-7
Service Bulletin/Repair Instructions
CBR - Resolution Process for Locked Control Unit(s)
CBR 2514-1 102025
Service Bulletin/Repair Instructions
CBR - Lost Communication to Alternator Message.
CBR 2511-1 102025
Service Bulletin/Repair Instructions
CBR - Inverter Low/No Power Shutoff Bypass
GDC25-001 092025
Service Bulletin/Repair Instructions
Particulate Filter Restriction - Soot Accumulation Bank 1
GDC25-002 092025
Service Bulletin/Repair Instructions
Low Fuel Pressure
GDC25-003 092025
Service Bulletin/Repair Instructions
Reductant Return: No Flow Detected
GDC25-004 092025
Service Bulletin/Repair Instructions
Reductant Pressure Sensor - Circuit Open
GDC25-005 092025
Service Bulletin/Repair Instructions
Exhaust Gas Temperature Sensor Circuit Short to Battery or Open
GDC25-006 092025
Service Bulletin/Repair Instructions
Engine Oil Over Temperature
GDC25-007 092025
Service Bulletin/Repair Instructions
Reductant Injection Valve Control Bank 1 Unit 1 - Circuit Open
GDC25-008 092025
Service Bulletin/Repair Instructions
Engine Coolant Over Temperature
GDC25-009 092025
Service Bulletin/Repair Instructions
Engine Oil Pressure Too Low
GDC25-010 092025
Service Bulletin/Repair Instructions
Engine Coolant Level Low - Elevated Coolant & Oil Temperature
GDC25-011 092025
Service Bulletin/Repair Instructions
Adaptive Cruise Control Issue
GDC25-012 092025
Service Bulletin/Repair Instructions
Lighting DTC list
CBR 2504 092025
Service Bulletin/Repair Instructions
Some vehicles may have reverse cameras not properly assigned from the factory.
CBR 2505 092025
Service Bulletin/Repair Instructions
The purpose of this CBR is to address the issue with Eco Roll disable switch notworking.
CBR 2503 092025
Service Bulletin/Repair Instructions
The purpose of this CBR is to outline the steps for adjusting brake pedal freeplay following Foot Brake Modulator (FBM) replacement or when diagnostic code C10C3-77is present.
CBR 2500 092025
Service Bulletin/Repair Instructions
This procedure describes the standardized method for repairing failed inserts pulled out of a table surface. It applies only when the receiving hole is not significantly damaged. Acceptable conditions include surface fraying or peeling at the painted layer only, with no full-depth cracking.
CBR 2502 092025
Service Bulletin/Repair Instructions
This CBR solution provides guidelines for ensuring the correct position of battery sensor modules and battery sensor harnesses on the Mack PR (4) and AN (4) chassis, as well as the Battery Sensor Diagnostic and Calibration Procedure.
CBR 2496 092025
Service Bulletin/Repair Instructions
The purpose of this CBR is outline the interim software solution for PR(4) andAN(4). Note that this document is subject to updates and currently covers Service Pack updates to B2_T2_1.2.
CBR 2497 092025
Service Bulletin/Repair Instructions
Electronic control units on the VN(4), PR (4) and AN (4) contain information that is critical for vehicle functionality, maintaining vehicle life data, and maintaining vehicle compliance. Because of this, swapping ECUs from truck to truck even for diagnostic purposes may cause functional or compliance complications that may or may not be apparent.
CBR 2408 092025
Service Bulletin/Repair Instructions
This document provides guidance for addressing the APM DTC C10129B fault," High/Excessive Flow" This fault was introduced by a previous APM software package and requires specific containment actions.
CBR 2482 092025
Service Bulletin/Repair Instructions
Purpose of this CBR is to address Pop up message for PTO Malfunction when there is no PTO Installed.
CBR 2465 092025
Service Bulletin/Repair Instructions
This CBR pertains to two issues that may arise with the Proactive Engine Restart (Remote Engine Start System).
CBR 2172-5 082025
Service Bulletin/Repair Instructions
CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a Critical failure, the vehicle will remain in Safe State.
CBR 2491-1 082025
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is to provide instructions when fault code U300056: Electronic Control Unit, Invalid/Incompatible Configuration for the RCIOM is active.
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.
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.
CBR 2429-3 072025
Service Bulletin/Repair Instructions
CBR - This CBR solution outlines the procedures for diagnosing, replacing, calibrating, and programming Flexible Switch Panels and the Security and Cab Interface Module (SCIM) to resolve switch malfunction notifications and associated fault codes.
CBR -2467-4 072025
Service Bulletin/Repair Instructions
CBR - This CBR solution was created toprovide guidance on resolving the “Service Required” message that may appear in the Instrument Cluster (IC) of VN (4) and PR (4) model vehicles under specific conditions.
CBR 2330 072025
Service Bulletin/Repair Instructions
CBR - Mechanical components with moving parts designed for high-temperature environments – such as the turbo wastegate used on the 13L TC engines – are susceptible to certain kinds of leakages due to their design requirements.
CBR 2396 072025
Service Bulletin/Repair Instructions
CBR - For newly delivered vehicles it may be found that the key fob will not unlock the door. The message "Pre-delivery Mode" maybe displayed on the instrument cluster.
CBR 2408 072025
Service Bulletin/Repair Instructions
CBR - This document provides guidance for addressing the Air ProductionModulator (APM) DTC C10129B fault, "High/Excessive Flow" This fault was introduced by a previous APM software package and requires specific containment actions.
CBR 2425 072025
Service Bulletin/Repair Instructions
CBR - This CBR solution outlines the analysis of temperature changes in sensors T1, T2, and T3 and provides a procedure for inspecting and addressing potential sensor issues related to AHI fuel injection.
CBR 2431 072025
Service Bulletin/Repair Instructions
CBR - This CBR solution addresses crank no start and engine dying issues in some VN (4) and PR (4) models caused by an incorrect fuel line configuration and/or fuel line fitting not seated correctly.
CBR 2443 072025
Service Bulletin/Repair Instructions
CBR - The truck’s trailer detection system uses a brief pulse of compressed air through the red trailer supply line to detect a connected trailer, but this pulse can inadvertently re-lock air-actuated tandem slide systems; this procedure outlines a method to mitigate the issue while sliding the trailer tandems.
CBR 2447 072025
Service Bulletin/Repair Instructions
CBR - Electronically Controlled Suspension (ECS) calibration using Premium Tech Tool (PTT) is required to correct discrepancies between the cluster load indicator and actual scale values, ensuring proper functionality of liftable axles and preventing unintended axle behavior.
CBR 2465-2 072025
Service Bulletin/Repair Instructions
CBR - This CBR pertains to two issues that may arise with the Proactive Engine Restart (Remote Engine Start System).
CBR 2482 072025
Service Bulletin/Repair Instructions
CBR - Purpose of this CBR is to address Pop up message for PTO Malfunction when there is not PTO Installed.
CBR 2483 072025
Service Bulletin/Repair Instructions
CBR - This CBR solution outlines the diagnosis and resolution of a DL6 CAN bus resistance issue, where a 40-ohmreading causes ELD communication failure, corrected by disconnecting the SCIM A262.D connector.
CBR 2474-1 202506
Service Bulletin/Repair Instructions
CBR - This bulletin provides guidance for identifying and addressing oil intrusion related to the Countershaft Brake (CSB) in AMT-G transmissions.
CBR 2472-2 202505
Service Bulletin/Repair Instructions
The purpose of this CBR is to provide instructions when trying to retrieve DTC and a Communication Failed Popup occurs.
CBR 2107-21 202505
Service Bulletin/Repair Instructions
Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer
CBR 2468-2 202505
Service Bulletin/Repair Instructions
The purpose of this CBR is to help diagnosis an electrically faulty door latch.
CBR 2463-3 202504
Service Bulletin/Repair Instructions
CBR - The purpose of this CBR is to assist in determining source(s) of suspect abnormal turbocharger noise.
CBR-2452 202503
Service Bulletin/Repair Instructions
If the vehicle door is open and the truck is in neutral, a popup message may appear on the Driver Information Display (DID) instructing the operator to shift into neutral. If this message appears while the vehicle is already in neutral, the Instrument Cluster (IC)requires a software update.
CBR-561 202503
Service Bulletin/Repair Instructions
If oil dilution is suspected refer to the applicable CBR solution below: ∙ CBR-659Mack Chassis - Oil Diluted With Fuel; Fuel In Oil, Diagnostic Information - All Emissions, All Model Years
S4342-202502
Service Bulletin/Repair Instructions
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.
S4373-202502
Service Campaign
Mack Trucks has determined that certain Mack sleeper cab assemblies were possibly manufactured with an insufficient number of welds across the rear flange of the upper header. The reduced number of welds could lower the designed cab integrity.
CBR-2016 202412
Service Bulletin/Repair Instructions
Frame lean can be caused by several seemingly isolated possibilities. The two most common are suspension and frame assembly issues.
CBR-997 202411
Service Bulletin/Repair Instructions
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 rear main seal leak, when the actual cause is the crankshaft adaptor O-ring.
CBR-2409 202411
Service Bulletin/Repair Instructions
CBR - 13L Engine - Rear Main Oil Seal Leak Model Year 2025
CBR-2417 202411
Service Bulletin/Repair Instructions
CBR - 11L Engine block compatibility and Backward Conversion Parts Requirements
CBR-2263 202410
Service Bulletin/Repair Instructions
CBR - Mack Chassis - Timing Gear Plate Repair
CBR-2411 202410
Service Bulletin/Repair Instructions
CBR - One-Box SCR Weld Leaks.
CBR-2409 202410
Service Bulletin/Repair Instructions
CBR - 13L Engine - Rear Main Oil Seal Leak - Model Year 2025
S0285 202410
Service Campaign
SERVICE CAMPAIGN - Pitman Arm Pinch Bolt Alignment
S4088 202409
Service Campaign
Service Campaign: Interaxle Driveline Torque
CBR-2376 202409
Service Bulletin/Repair Instructions
CBR: Drivers Information Display (DID) Inoperative/Goes Blank During Vehicle Operation
CBR-731 202409
Service Bulletin/Repair Instructions
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 And Newer Emissions, Common Model Years 2010 And Newer
CBR-407 202409
Service Bulletin/Repair Instructions
CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded.
CBR-471 202409
Service Bulletin/Repair Instructions
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.
CBR-2387 202409
Service Bulletin/Repair Instructions
CBR: Vehicles Equipped With A Lift Axle - Wheel Speed Fault Code SPN 793, SPN 794 Set When Axle Is Up
CBR-343 202408
Service Bulletin/Repair Instructions
CBR: Mack chassis with an mDRIVE transmission, there have been reports of complete shift assemblies and TECUs being replaced due to technicians being unable to pinpoint the source of the air leak.
CBR-523 202408
Service Bulletin/Repair Instructions
CBR: Overhead Wear Overview - Model Year2018 To Current (Common Rail Fuel System ONLY)
CBR-561 202408
Service Bulletin/Repair Instructions
CBR: 11L, 13L, And 16L Engine Oil Analysis Specifications - US10 And Newer Emissions
CBR-2214 202407
Service Bulletin/Repair Instructions
CBR: Turbo Compound 2nd Generation - EGR And O r DPF Diagnostic Trouble Codes(DTC), Diagnostic And Repair Information
S0488 202407
Service Campaign
Service Campaign: Interaxle Driveline Torque
CBR-2384 202407
Service Bulletin/Repair Instructions
CBR: Mack Chassis - Day Cab Glass Breakage
CBR-2356 202407
Service Bulletin/Repair Instructions
CBR: Drivers Information Display (DID)Inoperative After Cluster Replacement And Programming
CBR-2024 202407
Service Bulletin/Repair Instructions
CBR: Mack Anthem (AN) And Pinnacle (PI) -Bendix ABS Fault SPN 807 FMI 13 Blink code 19-4
CBR-2350 202407
Service Bulletin/Repair Instructions
CBR: Telematics Gateway (TGW) Connect Ability Issues
CBR-2383 202406
Service Bulletin/Repair Instructions
CBR - Accelerator Pedal: Inspection Instructions
CBR-2376 202406
Service Bulletin/Repair Instructions
CBR - Drivers Information Display (DID) Inoperative/Goes Blank During Vehicle Operation
CBR-2356 202406
Service Bulletin/Repair Instructions
CBR - Drivers Information Display (DID) Inoperative After Cluster Replacement And Programming
S3949 202406
Service Campaign
SC - Steering Stub Shaft Hardware Replacement
CBR-1008 202404
Service Bulletin/Repair Instructions
CBR: Equipped With An Automated Manual Transmission Model D or F ( AMT-D, AMT-F, mDrive) Missing X1 Value In VDA And Default Settings Guidelines, ParameterP1AOB; Fault Code P1052-54, Error 40,Or Error 18 Encountered During Clutch Or Tran.
CBR-2214 202404
Service Bulletin/Repair Instructions
CBR: Turbo Compound 2nd Generation - EGR And / Or DPF Diagnostic Trouble Codes (DTC), Diagnostic And Repair Information.
S3949 202404
Service Bulletin/Repair Instructions
Service Campaign: Steering Stub Shaft Hardware Replacement
CBR-2013 202404
Service Bulletin/Repair Instructions
CBR: Turbo Compound (TC) Hot Side Noise, Diagnostic Information.
CBR-2139 202403
Service Bulletin/Repair Instructions
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.
Reading this report
Complaint counts are reports filed with NHTSA, not failure rates. A common model collects more of them than a rare one that breaks more often.