Model year

2021 Mack Granite (GR)

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

Recall campaigns covering this model year9109k vehicles or units across those campaigns
Owner complaints0Not enough peers on file
Severity indexNoneCrash, fire, injury or death per 100
First 24 months0Complaints in its first two years
Complaints over time

Complaints about the 2021 Mack Granite (GR) 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.

No campaigns match these filters.Reset filters
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 2021 Mack Granite (GR)

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 2021 Mack Granite (GR)
CampaignFiledSubjectComponentVehiclesRemedy
25V-666Oct 6, 2025Seat belt anchorage bracket may be improperly weldedSeat belts15,841Repair or modification
24V-792Oct 23, 2024Electrical noise and low signal to the power line carrier may cause the ECU to incorrectly process commands or stop workingElectrical system59,338Software update
24V-773Oct 18, 2024Tires may not have been DOT tested and confirmed to be sufficient for the vehiclesTires49Part replacement
23V-600Aug 25, 2023Turn signals may be positioned incorrectly, reducing their visibilityLighting27,418Not stated
22V-401Jun 7, 2022Steering gears may have been assembled incorrectly, which can cause the gear to fractureSteering5,644Part replacement
21V-856Nov 3, 2021Machining defect may cause pressure to build in the power steering pump and break the shaft seal, resulting in a loss of power steering assistSteering79Part replacement
21V-573Jul 27, 2021Rear drive axle may have the incorrect type of brake cam installed, which could result in inoperative rear axle brakesBrakes124Part replacement
21V-416Jun 2, 2021Hubcap compression spring can cause the hubcap to separateWheels307Not stated
21V-233Apr 1, 2021Vehicles may not stay in their lane at certain speedsStability and traction control557Software update
Source: NHTSA ODI recalls file.
Owner complaints

What owners reported about the 2021 Mack Granite (GR)

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.
    Service bulletins

    219 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.

    • CBR 159 202608 Aug 10, 2026 · Service Bulletin/Repair Instructions
      Mack Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC) During Engine Pre-heat (Intake Air Heater) Operation - Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer
    • CBR 2595 072026 Jul 23, 2026 · Service Bulletin/Repair Instructions
      CBR - The purpose of this CBR is to provide information on 2010 and newer Mack Granite chassis experiencing a low frequency vibration.
    • CBR 2575-1 202604 Apr 30, 2026 · Service Bulletin/Repair Instructions
      CBR - Mack Chassis - Dash Panel Cracking at Mounting to BIW.
    • CBR 2573-1 202604 Apr 9, 2026 · Service Bulletin/Repair Instructions
      CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
    • CBR 2362-3 202604 Apr 9, 2026 · Service Bulletin/Repair Instructions
      CBR - Mack Carrier Nut Adhesive Change.
    • CBR 2712-7 032026 Mar 19, 2026 · Service Bulletin/Repair Instructions
      CBR - No Start Condition After Over the Air Programing.
    • CBR 2432-2 202601 Jan 8, 2026 · Service Bulletin/Repair Instructions
      CBR - Mack Chassis - AN And GR Models - Door Glass Shattering.
    • CBR 2107-22 202601 Jan 7, 2026 · Service Bulletin/Repair Instructions
      CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4) and PR(4)).
    • CBR 199 202512 Dec 4, 2025 · Service Bulletin/Repair Instructions
      Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
    • CBR 2171-11 202511 Nov 22, 2025 · Service Bulletin/Repair Instructions
      CBR - Mack Temperature Sensor Troubleshooting Guide
    • CBR 199-6 202511 Nov 12, 2025 · Service Bulletin/Repair Instructions
      CBR - 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In Between The Coolant Pump Housing And Oil Cooler Housing.
    • CBR 2172-5 082025 Aug 22, 2025 · 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 407 072025 Jul 17, 2025 · 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 2488 072025 Jul 28, 2025 · 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 2464-1 202505 May 1, 2025 · Service Bulletin/Repair Instructions
      Mack Chassis - Rear Axle Overheat
    • CBR 2107-21 202505 May 27, 2025 · Service Bulletin/Repair Instructions
      Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer
    • CBR 901-5 202505 May 13, 2025 · Service Bulletin/Repair Instructions
      Remote Control Central Door Lock, Programming; Key Fob Cannot Be Programmed Or Does Not Work After Programming - Model Year 2018 And Newer
    • CBR 445- 11 202505 May 1, 2025 · Service Bulletin/Repair Instructions
      Vehicles Equipped With a Common Rail Fuel System - Aftermarket Secondary Fuel Filters, Important Information On Approved Filters - US17+OBD16 toUS21+OBD23
    • CBR 170-8 202505 May 28, 2025 · Service Bulletin/Repair Instructions
      Inactive Code P25AE00 Being Generated After A Hard Pull And A Momentary Drop In Engine Oil Pressure (Low Oil Pressure) (Possible Related Codes - SPN4811 , SPN 100 , PID 100)
    • CBR 70-8 202505 May 6, 2025 · Service Bulletin/Repair Instructions
      Lack of lateral structural hood support.
    • CBR-2452 202503 Mar 17, 2025 · 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 Clust…
    • CBR-561 202503 Mar 6, 2025 · Service Bulletin/Repair Instructions
      If oil dilution is suspected refer to the applicable CBR solution below: ∙ CBR-659􀁡Mack Chassis - Oil Diluted With Fuel; Fuel In Oil, Diagnostic Information - All Emissions, All Model Years
    • CBR-2432 202501 Jan 15, 2025 · Service Bulletin/Repair Instructions
      This CBR solution provides detailed instructions for diagnosing and addressing window glass shattering issues, including replacement specifications, interference checks, fastener verification, and reinforcement tab adjustments to ensure proper installation …
    • CBR-2016 202412 Dec 3, 2024 · 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 Nov 14, 2024 · 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-2263 202410 Oct 31, 2024 · Service Bulletin/Repair Instructions
      CBR - Mack Chassis - Timing Gear Plate Repair
    • S4214 202409 Sep 25, 2024 · Service Campaign
      Service Campaign: GR Hood Insulation
    • CBR-2376 202409 Sep 19, 2024 · Service Bulletin/Repair Instructions
      CBR: Drivers Information Display (DID) Inoperative/Goes Blank During Vehicle Operation
    • CBR-731 202409 Sep 16, 2024 · 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-570 202409 Sep 20, 2024 · Service Bulletin/Repair Instructions
      CBR: US17 GHG Common Rail Fuel System Component Electrical Faults - Model Year 2017 To 2024
    • CBR-471 202409 Sep 10, 2024 · 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-407 202409 Sep 13, 2024 · 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-2391 202408 Aug 6, 2024 · Service Bulletin/Repair Instructions
      CBR: Diagnostic Trouble Code (DTC) U010187- Lost Communication With TECU
    • CBR-561 202408 Aug 13, 2024 · Service Bulletin/Repair Instructions
      CBR: 11L, 13L, And 16L Engine Oil Analysis Specifications - US10 And Newer Emissions
    • CBR-523 202408 Aug 13, 2024 · Service Bulletin/Repair Instructions
      CBR: Overhead Wear Overview - Model Year2018 To Current (Common Rail Fuel System ONLY)
    • CBR-343 202408 Aug 28, 2024 · 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-2384 202407 Jul 10, 2024 · Service Bulletin/Repair Instructions
      CBR: Mack Chassis - Day Cab Glass Breakage
    • CBR-2356 202407 Jul 9, 2024 · Service Bulletin/Repair Instructions
      CBR: Drivers Information Display (DID)Inoperative After Cluster Replacement And Programming
    • CBR-2350 202407 Jul 2, 2024 · Service Bulletin/Repair Instructions
      CBR: Telematics Gateway (TGW) Connect Ability Issues
    • CBR-2384 202406 Jun 29, 2024 · Service Bulletin/Repair Instructions
      CBR - Mack Chassis - Day Cab Glass Breakage
    • CBR-2383 202406 Jun 19, 2024 · Service Bulletin/Repair Instructions
      CBR - Accelerator Pedal: Inspection Instructions
    • CBR-2376 202406 Jun 11, 2024 · Service Bulletin/Repair Instructions
      CBR - Drivers Information Display (DID) Inoperative/Goes Blank During Vehicle Operation
    • CBR-2356 202406 Jun 8, 2024 · Service Bulletin/Repair Instructions
      CBR - Drivers Information Display (DID) Inoperative After Cluster Replacement And Programming
    • CBR-2139 202405 May 2, 2024 · 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. A new and improved fuel galley plug has been developed to reso…
    • CBR-2360 202404 Apr 2, 2024 · Service Bulletin/Repair Instructions
      CBR: Chassis Equipped With VECU5 Active Datalink/Communication Faults For Multiple Modules; ABS And SRS Communication Faults
    • CBR-2013 202404 Apr 2, 2024 · Service Bulletin/Repair Instructions
      CBR: Turbo Compound (TC) Hot Side Noise, Diagnostic Information.
    • CBR-1008 202404 Apr 22, 2024 · 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-2356 202403 Mar 1, 2024 · Service Bulletin/Repair Instructions
      CBR: After cluster replacement and programming, the Driver Information Display (DID) may not function as designed.
    • CBR-2139 202403 Mar 1, 2024 · 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.
    • S3630 202402 Feb 18, 2024 · Service Bulletin/Repair Instructions
      Service Campaign - MP8 Stainless Oil Pan.
    • CBR-2350 202402 Feb 21, 2024 · Service Bulletin/Repair Instructions
      CBR -Telematics Gateway (TGW) Connect Ability Issues
    • CBR-2347 202402 Feb 16, 2024 · Service Bulletin/Repair Instructions
      CBR - Active "Set Park Brake" Message On Drivers Information Display (DID).
    • CBR-202 202402 Feb 16, 2024 · Service Bulletin/Repair Instructions
      CBR - Automated Manual Transmission ( AMT ) Flywheel Pilot Bearing Wear On Input Shaft.
    • CBR-2014 202402 Feb 16, 2024 · Service Bulletin/Repair Instructions
      CBR - Driveline Noise, Suspension Ride Height Too High, Suspension Will Not Exhaust - Chassis Built 2016w01 And Newer.
    • CBR-2333 202401 Jan 18, 2024 · Service Bulletin/Repair Instructions
      CBR: TGW Will Not Connect After SIM Card Replacement
    • CBR-2016 202401 Jan 17, 2024 · Service Bulletin/Repair Instructions
      CBR: Frame Or Cab Lean
    • CBR-2320 202312 Dec 1, 2023 · Service Bulletin/Repair Instructions
      CBR: For vehicles equipped with an 11L engine, the plastic saddle bracket holding the a/c line on the left side of the engine may move excessively and rub the area where it secures the line.
    • PSM23m2na71 Nov 10, 2023 · Service Bulletin/Repair Instructions
      Parts Sales and Marketing Bulletin: Mack Trucks is excited to announce an additional year warranty program on REMACK AMT mDRIVE Complete Transmissions. This extended warranty of 3 years or 350,000 miles on the transmission will be applicable when dealer in…
    • M-465-001 202311 Nov 7, 2023 · Service Bulletin/Repair Instructions
      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 ne…
    • CBR-399 202310 Oct 19, 2023 · Service Bulletin/Repair Instructions
      CBR: Vehicle Overspeed Warning Comes Active At A Lower Speed Than Expected; Vehicle Overspeed Warning In Driver Information Display (DID) - Model Year 2018 And Newer With New Style Instrument Cluster
    Source: NHTSA manufacturer communications files.