AutoStatsIQ
Data through Oct 2026
Model yearDo not drive

2026 Mack Pioneer PR (4)

Body and fuel not decoded. Owner complaints on file from no date to no date.

Recalls (9)Complaints (0)Investigations (0)Bulletins (100)
Recall campaigns covering this model year97,929 vehicles or units across those campaigns
Owner complaints0Not enough peers on file
Severity indexNoneCrash, fire, injury or death per 100
First 24 monthsOpenWindow has not closed yet
Complaints over time

Complaints about the 2026 Mack Pioneer PR (4) by year filed

Owner complaints about this model year, by the year they were filed with NHTSA.

No campaigns match these filters.Reset filters
Source: NHTSA ODI complaints file. The lighter column runs through October.
Components

Complaints by component

Owner complaints by component. Hover or focus a bar for the crash, fire, injury or death count.

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Source: NHTSA ODI complaints file. A complaint can name more than one component; it is counted under the first.
Recalls

9 recall campaigns cover the 2026 Mack Pioneer PR (4)

Check a specific vehicle by VIN on NHTSA's site: a campaign may cover only part of a model year's production.

Recall campaigns for the 2026 Mack Pioneer PR (4)
CampaignFiledSubjectComponentVehiclesRemedy
26V-631Oct 1, 2026Intake and grille bezels may detach from the vehicleStructure3,096Part replacement
26V-620Sep 28, 2026Inaccurate axle load calculations may cause reduced braking performance while transporting smoothbore tanker trailersBrakes850Software update
26V-351May 28, 2026Wheel lug nuts may loosen and allow the wheel to detachDo not driveWheels644Part replacement
26V-261Apr 23, 2026Rear brake modulators may have unprotected electrical connectors that can short circuit and lead to a loss of the anti-lock brake system (ABS) and…Brakes2,772Part replacement
26V-207Apr 1, 2026Trailer turn signals may not function properlyLighting86Software update
25V-803Nov 20, 2025Automatic high beams (AHB) may not switch to low beam headlights as intendedLighting247Software update
25V-801Nov 20, 2025Load lock clamps, located on the back of the cab, may loosen and cause the load lock bars to become unsecuredEquipment46Part replacement
25V-622Sep 18, 2025When towing a trailer, the trailer lights may fail to illuminate due to an improperly manufactured body control moduleLighting156Part replacement
25V-521Aug 11, 2025Dynamic steering and oversteer guidance feature may malfunction and cause a loss of steering controlSteering32Software update
Source: NHTSA ODI recalls file.
Look up a VIN at NHTSA
Owner complaints

What owners reported about the 2026 Mack Pioneer PR (4)

The full text of every complaint filed with NHTSA about this model year, newest first. Complaints are filed by owners and are not verified by NHTSA; NHTSA removes personal details before publishing.

0 complaints on file.

    Source: NHTSA ODI complaints file.
    Investigations

    NHTSA has not opened an investigation on this model year

    Source: NHTSA ODI investigations file.
    All investigations
    Service bulletins

    100 manufacturer communications cover this model year

    Technical service bulletins and other notices the manufacturer sent to dealers. A bulletin is not a recall; the 60 most recent are listed.

    • TSB M-371-005A 202609 Sep 1, 2026 · Service Bulletin/Repair Instructions
      Jumper Harness Repair for Version 4 Mack Trucks
    • TSB M-373-003 202609 Sep 27, 2026 · Service Bulletin/Repair Instructions
      Power Cable Alternator Replacement
    • CBR 2590-3 202609 Sep 24, 2026 · Service Bulletin/Repair Instructions
      Instrument Cluster Going Dark
    • CBR 2496-18 202609 Sep 8, 2026 · Service Bulletin/Repair Instructions
      The purpose of this CBR is outline the interim software solution for PR(4) and AN(4).
    • CBR 2483-6 202609 Sep 17, 2026 · Service Bulletin/Repair Instructions
      Diagnostic instructions for CAN network communication issues.
    • TSB M257005 202608 Aug 26, 2026 · 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.
    • CBR 2599 202608 Aug 25, 2026 · Service Bulletin/Repair Instructions
      The purpose of this CBR is to provide support for complaints of trailer braking aggressively.
    • CBR 2598 202608 Aug 24, 2026 · Service Bulletin/Repair Instructions
      The purpose of this CBR is to provide steps on how to utilize the injector widget (within workshop toolbox) to aid with injection system issues.
    • CBR 2597 202608 Aug 17, 2026 · Service Bulletin/Repair Instructions
      The purpose of this CBR is to provide steps on how to correct a customer complaint of "Service Required" message for air filter replacement appears in the cluster. There may be no option in PTT or the cluster to reset the air filter service interval.
    • CBR 2596 202608 Aug 7, 2026 · 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.
    • CBR 2429 202608 Aug 10, 2026 · 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.
    • TSB M-590-001 072026 Jul 22, 2026 · Service Bulletin/Repair Instructions
      TSB - Wheel Speed Sensor Fitting And Cable Clamping.
    • CBR 2585-3 072026 Jul 7, 2026 · Service Bulletin/Repair Instructions
      CBR - The purpose of this CBR is to provide support for fault codes C106718 and/or C106818.
    • CBR 2545-3 072026 Jul 6, 2026 · Service Bulletin/Repair Instructions
      CBR - The purpose of this CBR is to provide guidance on fault code U114688.
    • CBR-2591-1 202606 Jun 16, 2026 · Service Bulletin/Repair Instructions
      The purpose of this CBR it to provide release notes for the recent Engine ECU software.
    • CBR-2590-2 202606 Jun 16, 2026 · 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-2588-2 202606 Jun 1, 2026 · 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-2587-2 202606 Jun 11, 2026 · 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 Jun 5, 2026 · Service Bulletin/Repair Instructions
      The purpose of this CBR is to address issues of exhaust stack rotation on version 4 products.
    • CBR-2568-5 202606 Jun 12, 2026 · Service Bulletin/Repair Instructions
      Contact Workshop; Communication Lost With Ultracapacitor Message With Associated CCIOM DTC U100687 And A Startability Issue.
    • CBR-2496-16 202606 Jun 12, 2026 · Service Bulletin/Repair Instructions
      The purpose of this CBR is outline the interim software solution for PR(4) and AN(4).
    • CBR-2465-7 202606 Jun 2, 2026 · 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.
    • GDC26-02 202605 May 29, 2026 · Service Bulletin/Repair Instructions
      Fault diagnostic information for Supplemental Restraint / Airbag Inflation System (SRS)
    • CBR 2587-1 202605 May 28, 2026 · Service Bulletin/Repair Instructions
      CBR to provide steps on how to protect the alternator power cable connection from corrosion.
    • CBR 2585-1 202605 May 13, 2026 · Service Bulletin/Repair Instructions
      CBR to provide support for fault codes C106718 and/or C106818.
    • CBR 2584-4 202605 May 7, 2026 · Service Bulletin/Repair Instructions
      Electronically controlled suspension (ECS) calibration procedure.
    • CBR 2583-1 202605 May 26, 2026 · Service Bulletin/Repair Instructions
      Tire Pressure Monitoring System U101A / U101B Fault Solution
    • CBR 2502-7 202605 May 6, 2026 · Service Bulletin/Repair Instructions
      Mack Chassis - Battery Sensor Diagnostic, Calibration, and Configuration Procedure
    • CBR 2496-14 202605 May 20, 2026 · Service Bulletin/Repair Instructions
      CBR to address when you should update to 3.0 service pack software update.
    • CBR 2465-6 202605 May 29, 2026 · Service Bulletin/Repair Instructions
      CBR to diagnosis issues with the Proactive Engine Restart system and Hood Open message.
    • CBR 2456-6 202605 Jun 2, 2026 · Service Bulletin/Repair Instructions
      Infotainment Update for Missing Apps, Navigation, and Apple/Android CarPlay Issues
    • GDC26-001 202604 Apr 25, 2026 · Over The Air
      GDC - Transmission Oil Level Sensor
    • CBR 2574 202604 Apr 24, 2026 · Service Bulletin/Repair Instructions
      CBR - Manual TPMS Wheel Sensor Calibration.
    • CBR 2573-1 202604 Apr 9, 2026 · Service Bulletin/Repair Instructions
      CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
    • CBR 2569-3 202604 Apr 16, 2026 · Service Bulletin/Repair Instructions
      CBR - Brake Pad Wear Indicator DTC C107E68.
    • CBR 2568-3 202604 Apr 28, 2026 · Service Bulletin/Repair Instructions
      CBR - Communication Lost With Ultracapacitor Message With Associated CCIOM DTC U100687 and a Startability Issue.
    • CBR 2562-15 202604 Apr 18, 2026 · Service Bulletin/Repair Instructions
      CBR - Electric Pneumatic Module (EPM) Fault
    • CBR 2540-7 202604 Apr 14, 2026 · Service Bulletin/Repair Instructions
      CBR - Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
    • CBR 2441-8 2026 202604 Apr 29, 2026 · Service Bulletin/Repair Instructions
      CBR - Key Fob Calibration and/or Replacement.
    • CBR 2362-3 202604 Apr 9, 2026 · Service Bulletin/Repair Instructions
      CBR - Mack Carrier Nut Adhesive Change.
    • S4808 032026 Mar 2, 2026 · Service Campaign
      SC - Certain model PR’s could experience grille surround trim detaching due to insufficient retention.
    • CBR 2570-1 032026 Mar 23, 2026 · Service Bulletin/Repair Instructions
      CBR - EBS - Electro-Pneumatic Module - Signal Compare Failure DTC C109562 - AN (4) - PR.
    • CBR 2565-1 032026 Mar 5, 2026 · Service Bulletin/Repair Instructions
      CBR - Trailer, 12Volt Right/Left Direction Indicator Circuit Warning - AN (4) - PR.
    • CBR 2564-1 032026 Mar 17, 2026 · Service Bulletin/Repair Instructions
      CBR - Check Radar Pop Up Message.
    • CBR 2712-7 032026 Mar 19, 2026 · Service Bulletin/Repair Instructions
      CBR - No Start Condition After Over the Air Programing.
    • S4757 022026 Feb 1, 2026 · 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 2514 022026 Feb 17, 2026 · 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.
    • SC S4751 202601 Jan 2, 2026 · Service Campaign
      CBR - Driver Environment Control Module Replacement.
    • SC S4742 202601 Jan 2, 2026 · Service Campaign
      CBR MCO/VECI Label Reprint.
    • CBR 2548-1 202601 Jan 21, 2026 · Service Bulletin/Repair Instructions
      CBR - Shock Interference With “Z” Springs.
    • CBR 2545-1 202601 Jan 7, 2026 · Service Bulletin/Repair Instructions
      CBR - U114688 VMCU Communication Fault - AN (4) - PR (4).
    • CBR 2540-5 202601 Jan 16, 2026 · Service Bulletin/Repair Instructions
      CBR - Upper Bunk Restraint System – Plastic Gable Retention Field Fix.
    • CBR 2522-5 202601 Jan 31, 2026 · Service Bulletin/Repair Instructions
      CBR - Frequent Parked Regeneration Requests - Models PR (4), AN (4).
    • CBR 2516-6 202601 Jan 3, 2026 · Service Bulletin/Repair Instructions
      CBR - CMS Black Screen Troubleshooting - PR (4) - AN (4).
    • CBR 2502-2 202601 Jan 6, 2026 · Service Bulletin/Repair Instructions
      CBR - Mack Chassis - Battery Sensor Diagnostic and Calibration Procedure - PR (4) - AN (4).
    • CBR 2496-9 202601 Jan 28, 2026 · Service Bulletin/Repair Instructions
      CBR - The purpose of this CBR is outline the interim software solution for PR(4) and AN(4).
    • CBR 2443-3 202601 Jan 28, 2026 · Service Bulletin/Repair Instructions
      CBR - Trailer Tandem Adjustment Procedure - PR (4) - AN (4).
    • CBR 2408-16 202601 Jan 9, 2026 · Service Bulletin/Repair Instructions
      CBR - Air Production Modulator (APM) DTC C10129B - High/Excessive Flow - PR (4).
    • CBR 2542 202512 Dec 20, 2025 · Service Bulletin/Repair Instructions
      This document provides mandatory interim parameter settings to ensure proper vehicle operation.
    • CBR 2540 202512 Dec 20, 2025 · Service Bulletin/Repair Instructions
      Upper Bunk Restraint System – Plastic Gable Retention Field Fix
    Source: NHTSA manufacturer communications files.
    About service bulletins