Model year

2021 Western Star 4900

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

Recall campaigns covering this model year923k 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 Western Star 4900 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 Western Star 4900

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 Western Star 4900
CampaignFiledSubjectComponentVehiclesRemedy
22V-919Dec 12, 2022Vehicles are equipped with tires that are not compatible with their 8.25-inch rimsTires49Part replacement
21V-946Dec 8, 2021Steering shaft pinch bolt may not have been properly tightened, allowing the steering shaft to separate from the steering gearSteering21Part replacement
21V-896Nov 17, 2021Tires and rims are not approved and rated for these vehicles from the Tire and Rim Association or tire manufacturerTires307Part replacement
21V-369May 19, 2021Tie rod clamps may be loose, which could result in loose tie rod ends that could break or detachSteering8,482Part replacement
21V-256Apr 12, 2021Steering arm and tie rod bolts may have a defective seam that can fractureSteering12,470Part replacement
20V-660Oct 27, 2020Steer axle spindle nut snap-ring locking feature may be incorrectly installed or missing from the left spindle nut at the spindleSuspension1,411Part replacement
20V-634Oct 14, 2020Vehicle certification label contains incorrect information, stating a Gross Axle Weight Rating (GAWR) that exceeds the tire capacity ratingEquipment53Repair or modification
20V-539Sep 3, 2020Lower rear pivot cap screws may not be long enough to sufficiently engage the locking feature of the corresponding nutsSuspension103Inspection
20V-211Apr 10, 2020Gross Axle Weight Rating (GAWR) on the certification label may be incorrect, possibly resulting in the vehicle being overloadedEquipment89Label or owner notice
Source: NHTSA ODI recalls file.
Owner complaints

What owners reported about the 2021 Western Star 4900

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

    117 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.

    • PB-47-900-WST Jun 1, 2026 · Service Bulletin/Repair Instructions
      Parts Bulletin for Fluorosilicone Fuel Tank Cap Seals
    • CXA 03_26_Surge Tank Mar 19, 2026 · Other
      CX Advocate for discolored coolant surge tanks (24CSA-20)
    • CXA_10_25_Conmet Oil Pan Oct 16, 2025 · Other
      CX Advocate for ConMet Oil Pan Insert Additional Issues
    • 24CSA-19Rev Aug 15, 2025 · Other
      Revised Customer Service Annoucement for No Trouble Found Heavy Duty Engine Product (HDEP) Oil Separator Leaks
    • CXA 3_25_NOx Mar 20, 2025 · Other
      CX Advocate for NOx conversion low faults
    • CXA 2_25_NOx Feb 20, 2025 · Other
      CX Advocate for NOx conversion low faults
    • CXA 1_16_NOx Jan 16, 2025 · Other
      CX Advocate for NOx conversion low faults
    • SS1023366-Detroit Oct 1, 2024 · Other
      Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines
    • 24CSA-20 Oct 7, 2024 · Service Bulletin/Repair Instructions
      Customer Service Annoucement for Discolored Coolant Surge Tank on Heavy Duty Engine Product (HDEP)
    • 24CSA-19 Oct 7, 2024 · Other
      Customer Service Annoucement for Heavy-Duty Engine Product (HDEP) Oil Separator Leaks
    • SS1023366-Detroit Sep 16, 2024 · Other
      Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines
    • CXA 8_24_Conmet Oil Pan Aug 15, 2024 · Other
      CX Advocate for ConMet Oil Pan Insert Additional Failures
    • CXA 8_24_AutoElevate Disa Aug 15, 2024 · Other
      CX Advocate for AutoElevate Disablement Gen5 Engines
    • CXA 8_24_AutoElevate and Aug 15, 2024 · Other
      CX Advocate for benefits of Autoelevate and hydrocarbon faults
    • CXA 7_24_NOx Jul 18, 2024 · Other
      CX Advocate for NOx conversion low faults. Update to CXA 6_24_NOx submission.
    • CXA 7_24_Conmet Oil Pan Jul 18, 2024 · Other
      CX Advocate for ConMet Oil Pan Insert Additional Failures
    • CXA 7_24_AutoElevate Disa Jul 18, 2024 · Other
      CX Advocate for AutoElevate Disablement Gen5 Engines
    • CXA 06_24_Clutch Bolts Jun 21, 2024 · Other
      CX Advocate communication for clutch bolts
    • CXA 06_24_NOx Jun 21, 2024 · Other
      CX Advocate communication for NOx conversion low faults
    • VSWP Customer Letter May 21, 2024 · Other
      Customer letter regarding variable speed water pump.
    • SS734-WST May 24, 2024 · Other
      Service Solution for Thread Spring Pin Suspension Alignment & Installation
    • SS763-WST May 8, 2024 · Other
      Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller
    • TSB35-023-WST May 29, 2024 · Service Bulletin/Repair Instructions
      Technical Service Bulletin for New Final Drive Over Heat Diagnostic
    • SS3144-FTL Apr 25, 2024 · Service Bulletin/Repair Instructions
      Service Solution for DEF Pump Wiring for Cummins CM2450 Engine Controller
    • ICI24-006 Feb 20, 2024 · Service Bulletin/Repair Instructions
      Important Campaign Information letter for FL974 - Revised Bulletin & Population
    • FL974 Feb 20, 2024 · Service Bulletin/Repair Instructions
      Revised Emissions Recall: Cummins DEF Sensor Shortage. REVISION: Some vehicles formerly in Group F have been moved to Group G and have been assigned a new part number as specified in Table 1. An SRT for 'Calibration Code Only: Update or Confirm' has been ad…
    • FL974 Jan 19, 2024 · Service Bulletin/Repair Instructions
      Emissions Recall: Cummins DEF Sensor Shortage
    • SBW83-030 Jun 27, 2022 · Service Bulletin/Repair Instructions
      Updated Western Star Service Bulletin for HVAC Actuator Replacement
    • SBW83-030 May 10, 2022 · Service Bulletin/Repair Instructions
      Western Star Service Bulletin for HVAC Actuator Replacement. The wiring harness of the actuator of the fresh air recirculation door on Western Star vehicles equipped with Red Dot HVAC systems should be inspected for signs of water intrusion and corrosion.
    • ICI22-017 Apr 13, 2022 · Service Bulletin/Repair Instructions
      Important Campaign Information Letter for DDC D21M1 Termination Date Extended. This letter is to inform you that a revised bulletin for Detroit Diesel Field Service Campaign D21M1, DT12 Transmission Drive Shaft Cover Plug Reseal has been EXTENDED for an add…
    • SBW49-020 Feb 15, 2022 · Service Bulletin/Repair Instructions
      Western Star Service Bulletin for DEF Connector Reinforcement Caps
    • CALWS83-001REV Dec 9, 2021 · Service Bulletin/Repair Instructions
      HVAC Actuator Wiring Harness. Revision History: Service kit part number changed from RDH RD5 17147 0 to WWS RD-3-9069-0 on 12/9/21. The wiring harness of the actuator of the fresh air recirculation door, shown in Fig. 1, on Western Star vehicles equipped wi…
    • SF613 Oct 1, 2021 · Service Bulletin/Repair Instructions
      ConMet Front Hub to Rotor Fasteners. On certain vehicles, the front rotor nuts may not be torqued to manufacturer specification. Loose components could cause damage to the ABS tone rings, the ABS sensors, and the anchor plate mounting fasteners.
    • ICI21-030 Oct 18, 2021 · Service Bulletin/Repair Instructions
      SF626 Western Star Window Replacement Inspection Notification. This letter is to inform you that Field Service Campaign SF626 Western Star Window Replacement Inspection Notification campaign was released.
    • CALWS83-001 Sep 10, 2021 · Service Bulletin/Repair Instructions
      Customer Advisory Letter for HVAC Actuator Wiring Harness. The wiring harness of the actuator of the fresh air recirculation door, shown in Fig. 1, on Western Star vehicles equipped with Red Dot HVAC systems should be inspected for signs of water intrusion …
    • SBW54-080 Jun 10, 2021 · Service Bulletin/Repair Instructions
      Western Star Service Bulletin for Key Fob ID Retention. Key fobs for remote keyless entry on Western Star vehicles are delivered in packages that include a unique ID for the fob. The ID is required when pairing the key fob with a vehicle.
    • SS708-WST2021 Jun 11, 2021 · Service Bulletin/Repair Instructions
      Western Star Service Solution for Low Voltage Disconnect (LVD) Troubleshooting: Western Star 5700 and New 4700.
    • SS1033094 May 12, 2017 · Service Bulletin/Repair Instructions
      Service Solution SS 1033094 KUS Float Tube Fuel Level Sensor Inform...
    • WSTCAE180-2020 Oct 13, 2020 · Service Bulletin/Repair Instructions
      Portland Truck Plant Paint Changes
    • D21M1 Apr 19, 2021 · Service Bulletin/Repair Instructions
      Detroit Field Service Campaign for DT12 Transmission Drive Shaft Cover Plug Reseal. Daimler Trucks North America LLC, on behalf of its DETROIT Powertrain Division, is initiating Field Service Campaign D21M1 on certain DT12 transmissions in order to reseal t…
    • WI21-009 Apr 19, 2021 · Service Bulletin/Repair Instructions
      Warranty Information letter announcing that DTNA is increasing the Standard Diagnostic Times (SDTs) shown. The updated after treatment system (ATS) diesel exhaust fluid (DEF) pump times will be applied to repair orders opened on or after April 12, 2021.
    • WI21-008 Apr 6, 2021 · Service Bulletin/Repair Instructions
      Warranty Information Letter announcing DTNA is adjusting the Standard Repair Times (SRTs) shown. The updated times will be applied to repair orders opened on or after April 5, 2021.
    • DT12 Trans Chafe Mar 10, 2021 · Service Bulletin/Repair Instructions
      DTNA received a field notification on multiple units regarding diagnostic fault codes that were found to be causing issues to the After Treatment Control Module (ACM). These fault codes indicated that the ACM communication message was not received by the Mo…
    • TechTalk12312K Mar 18, 2021 · Service Bulletin/Repair Instructions
      Tech Talk discussion on suspended accelerator pedal being uncomfortable for ice road operation.
    • WP60-100 Mar 10, 2021 · Service Bulletin/Repair Instructions
      Updated Western Star Parts Technical Bulletin for Universal Design Floor Mats. This bulletin replaces the version dated February 12, 2021. Information about parts notes in the Paragon system have been added and the trimming instructions are revised. Univers…
    • SBW54-057 Oct 27, 2020 · Service Bulletin/Repair Instructions
      Western Star Service Bulletin for Powernet Troubleshooting Guide - Batteries, Path, Alternator, and Starter. When troubleshooting powernet issues, use the BCT-460DTNA PowerNet Assessment Tool. As of May 29, 2018, the AutoMeter is the only Daimler-approved t…
    • WP21-007 Mar 22, 2021 · Service Bulletin/Repair Instructions
      Warranty Policy Letter for battery tags. DTNA determined that since adopting the AutoMeter BCT-460DTNA Powernet Assessment Tool (AutoMeter) as the required powernet system tester, not all battery tags have to be retained support Warranty-related claims.
    • WI21-004 Feb 1, 2021 · Service Bulletin/Repair Instructions
      Warranty Information Letter for Detroit Resources: Exploded View DD Platform and DT12 Posters. Detroit's TechComm team created visual aids for the network and released exploded view posters for DD platform engines. In early 2021, Detroit added multiple DT12…
    • 21TS-04 Feb 19, 2021 · Service Bulletin/Repair Instructions
      Technical Service Letter for Gen 5 DD15 Instrument Panel Oil Pressure Gauge Operation. Gen 5 DD15 equipped units have been brought in for service with a complaint of the instrument panel oil pressure gauge not moving during unit operation and/or stuck at 50…
    • 21OEM-06 Feb 19, 2021 · Service Bulletin/Repair Instructions
      Starting on November 23, 2020, DiagnosticLink 8.13 (Build 4527) was made available. Current subscribers of DiagnosticLink 8.11 or 8.12 may upgrade to DiagnosticLink 8.13 at no cost. All DTNA Service shops & OEM locations are required to maintain the latest …
    • 20TS-07REV Feb 19, 2021 · Service Bulletin/Repair Instructions
      Revised Technical Service Letter for Cold Weather Faults on GHG17/21 DD13 with MCM Software Version 14. Due to colder weather, there may be an increase in the frequency of faults, noted below, on GHG17/21 DD13 trucks built after June 5th 2019. This is due t…
    • WP60-100 Feb 12, 2021 · Service Bulletin/Repair Instructions
      Western Star Parts Technical Bulletin for Universal Design Floor Mats. Universal floor mat designs fit multiple cab configurations and may require trimming. Trim lines displaying size options are scored into the pad side of the mat; use an existing floor ma…
    • ICI21-003 Feb 15, 2021 · Service Bulletin/Repair Instructions
      Superseding Letter to an Important Campaign Information Letter to announce a reimbursement available to dealers for travel to a customer's location to perform a recall or field service campaign. Potential travel reimbursement applies to DTNA truck dealers a…
    • WI21-006 Feb 15, 2021 · Service Bulletin/Repair Instructions
      Warranty Information Letter for Detroit NOx Sensor Circuit Fault Codes - Claim Guidelines.
    • WI21-005 Feb 15, 2021 · Service Bulletin/Repair Instructions
      Warranty Information Letter for Body Builder/Truck Equipment Manufacturer Demonstration Program.
    • WI20-014R Feb 8, 2021 · Service Bulletin/Repair Instructions
      Revised Warranty Information Letter for OWL and Warranty Manual Improvement: Sublets and Travel Time/Distance. In the spirit of continuous improvement, DTNA reviewed sublet-related policies and procedures. The goal was to improve language clarity and optimi…
    • TechTalk8044 Jan 15, 2021 · Service Bulletin/Repair Instructions
      Tech Talk discussion on Western Star No Start.
    • 21TS-01 Jan 25, 2021 · Service Bulletin/Repair Instructions
      Technical Service Letter for Detroit Bearing Failures - Standard Diagnostic Times. DTNA is increasing repair strategies for determining the root cause of Detroit DD heavy duty lower end bearing failures. To support this strategy change, Detroit now has two …
    • WI21-003 Jan 25, 2021 · Service Bulletin/Repair Instructions
      Warranty Information Letter for Detroit Bearing Failures - Standard Diagnostic Times. DTNA is increasing repair strategies for determining the root cause of Detroit DD heavy duty lower end bearing failures. To support this strategy change, Detroit now has t…
    • SBW35-018 Dec 17, 2020 · Service Bulletin/Repair Instructions
      Western Star Service Bulletin for Axle Flange Gasket Replaced with O-Ring. Daimler Trucks North America has released a new axle shaft to hub rubber O-ring (part number 11-30728-000) as a replacement for the paper gasket (part number 11-14418-000). The new O…
    Source: NHTSA manufacturer communications files.