Model year

2021 Thomas Built Buses Saf-T-Liner HDX

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

Recall campaigns covering this model year1665k 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 Thomas Built Buses Saf-T-Liner HDX 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

16 recall campaigns cover the 2021 Thomas Built Buses Saf-T-Liner HDX

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 Thomas Built Buses Saf-T-Liner HDX
CampaignFiledSubjectComponentVehiclesRemedy
24V-555Jul 24, 2024Emergency Exit Label lettering is too small and may be difficult to readEquipment27,494Not stated
22V-762Oct 12, 2022Exterior roof panel was manufactured with insufficient joint strengthStructure17,613Repair or modification
22V-688Sep 14, 2022Rear exterior side-body panel was manufactured with insufficient joint strengthStructure1,259Repair or modification
22V-634Aug 19, 2022Forward seat barriers may not provide sufficient protection to passengersSeats7,561Part replacement
22V-510Jul 19, 2022Passenger seat frames may crack and rotate from fatigueSeats1,806Repair or modification
22V-272Apr 22, 2022Positive battery cable may be routed improperly, allowing it to chafe against the transmission oil cooler hoses, which can cause an electrical…Electrical system138Repair or modification
22V-271Apr 22, 2022Positive battery cable may be routed improperly, allowing it to chafe against the transmission oil cooler hoses, which can cause an electrical…Electrical system2,943Repair or modification
21V-915Nov 22, 2021Gross axle weight rating (GAWR) may be improperly stated on the labelEquipment1Repair or modification
21V-850Nov 2, 2021Nut for the power cable stud on the alternator may not have been tightened properly, which can cause a loose cable connectionElectrical system1,434Repair or modification
21V-660Aug 25, 2021Power steering hose may be routed with inadequate clearance between the hose and the power cables, potentially damaging the power steering hoseSteering114Repair or modification
21V-659Aug 25, 2021Power steering hose may be routed with inadequate clearance between the hose and the power cablesSteering1,934Repair or modification
21V-462Jun 17, 2021These school buses may have been manufactured with an incorrect passenger seat configuration that does not provide the proper amount of seat back…Seats9Part replacement
21V-370May 19, 2021Tie rod clamps may be loose, which could result in loose tie rod ends that could break or detachSteering479Part replacement
21V-327May 7, 2021Sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leakFuel system1,262Part replacement
21V-255Apr 12, 2021Steering arm and tie rod bolts may have a defective seam that can fractureSteering1,252Part replacement
21V-017Jan 20, 2021On certain vehicles, one of the six brake caliper mounting bolts on the driver side steer axle may have been incorrectly tightenedBrakes6Repair or modification
Source: NHTSA ODI recalls file.
Owner complaints

What owners reported about the 2021 Thomas Built Buses Saf-T-Liner HDX

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

    61 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-54-029-FTL Jul 6, 2026 · Service Bulletin/Repair Instructions
      Technical Service Bulletin for Electrical Wiring Modifications for Type DFootwell Heater
    • SS 306-TBB Apr 23, 2026 · Other
      Service Solution for HDX DEF Header Service Replacement Additional Parts
    • SS306-TBB Aug 7, 2025 · Other
      Service Solution for HDX DEF Header Service Replacement Additional Parts
    • SS288-TBB Feb 5, 2025 · Other
      Service Solution for HDX / EFX front lighting replacement
    • SS293-TBB Jan 7, 2025 · Other
      Service Solution for Wiper Module TBB 61201552 replacement
    • WI24-019 Nov 11, 2024 · Warranty Program/Extension
      Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair Time Updates
    • Cummins B6.7 DEF Header O Oct 21, 2024 · Other
      Extended Warranty Policy for certain Cummins B6.7 engines for TBB vehicle DEF headers for EPA and CARB Emissions Reporting
    • CXA_10_17_CARB Truck Chec Oct 17, 2024 · Other
      CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check.
    • SS293-TBB Oct 3, 2024 · Other
      Service Solution for Wiper Module TBB 61201552 replacement
    • SS1023366-Detroit Sep 16, 2024 · Other
      Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines
    • 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
    • PAB040-2021 Jul 27, 2021 · Service Bulletin/Repair Instructions
      Product Awareness Bulletin for Saf-T-Liner HDX Dash Decal. TBB made a change in April of 2020 to remove the Saf-T-Liner HDX decal off the front surface of the driver’s side dash. This change was made due to the adhesion concerns that we were having with the…
    • PAB007-2021 Jan 21, 2021 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on MY2021 Cummins B6.7 Containment Plan
    • SS1033208 Aug 22, 2017 · Service Bulletin/Repair Instructions
      Service Solution SS 1033208TBB TM21 Dual AC alignment and not seate...
    • PAB022-2020 May 26, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Driver’s Window Update - HDX
    • PAB021-2020 May 13, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on “School Bus” Lettering
    • PAB036-2020 Oct 21, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Lettering Changes - Notification
    • PAB028-2020 Jul 22, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Heater Hose Changes
    • PAB026-2020 Jul 17, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on National Driver’s Seat Update
    • PAB014-2020 Mar 26, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Defender Composite Stop Arm Changes
    • PAB012-2020 Mar 23, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on PV360 NS Camera – Type D
    • PAB010-2020 Mar 17, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Buy America Cummins B6.7 Engine
    • PAB009-2020 Mar 5, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Roof Top Lettering (Addendum)
    • PAB007-2020 Feb 25, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on 12V Outlets Update
    • PAB002-2020 Jan 22, 2020 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Power Outlet
    • PAB048-2019 Dec 6, 2019 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Data Book Update
    • PAB043-2019 Dec 2, 2019 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Lettering Update
    • PAB042-2019 Nov 15, 2019 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Allison 7 Year Warranty
    • PAB038-2019 Nov 1, 2019 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Freedman Seating Update
    • PAB035-2019 Sep 25, 2019 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Slide – n Click Update
    • PAB033-2019 Sep 5, 2019 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Lamp Monitors
    • PAB025-2019 Jul 25, 2019 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Air Conditioning Update, HDX
    • PAB022-2019 Jun 27, 2019 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on ESC Update EFX and HDX
    • PAB004-2019 Mar 18, 2019 · Service Bulletin/Repair Instructions
      Thomas Built Buses Product Awareness Bulletin on Corrosion Protection EFX & HDX
    • 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.
    • ICI21-004 Feb 15, 2021 · Service Bulletin/Repair Instructions
      Important Campaign Information Letter for Dealer Travel for Campaign Performance – TBB.
    • 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…
    • WP20-018R Dec 8, 2020 · Service Bulletin/Repair Instructions
      Revised Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. Revisions are in blue. With Mascot now in partnership with Detroit Reman and Alliance Parts, DTNA is pleased to announce that Mascot coverage has been added to OWL. Re…
    • WP20-018 Dec 7, 2020 · Service Bulletin/Repair Instructions
      Warranty Policy Letter for Alliance/Mascot Aftermarket Warranty and Claim Filing. With Mascot now in partnership with Detroit Reman and Alliance Parts, DTNA is pleased to announce that Mascot coverage has been added to OWL. Remanufactured Alliance/Mascot pa…
    • TechTalk4725 Sep 22, 2020 · Service Bulletin/Repair Instructions
      Tech Talk discussion about power steering fluid.
    • ICI20-022 Aug 3, 2020 · Service Bulletin/Repair Instructions
      Important Campaign Information letter announcing Dealer Travel for Campaign Performance. This letter is to announce a reimbursement available to dealers for travel to a customerÃÂâÃÂÃÂÃÂÙs location to perform a recall or field service campaign.
    • WI20-014 Aug 3, 2020 · Service Bulletin/Repair Instructions
      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 optimize proce…
    • WI20-012 Aug 3, 2020 · Service Bulletin/Repair Instructions
      Warranty Information Letter informing that to ensure that DTNA policies and service network practices align, the Warranty Department will be revising the Warranty Manual.
    • WI20-011 Jul 20, 2020 · Service Bulletin/Repair Instructions
      Warranty Information Letter for Detroit and TBB Parchment Format Update. In the continuing effort to standardize across brands, DTNA is pleased to announce that Detroit Diesel Corporation (Detroit) and Thomas Built Bus (TBB) parchments will be transitioned …
    • SB60-171 Jul 10, 2020 · Service Bulletin/Repair Instructions
      Service Bulletin for Guidelines for Cleaning and Disinfecting Cab Surfaces. The following guidelines are for cleaning and disinfecting commonly touched surfaces on the inside and outside of a vehicle. For best results, follow cleaning and disinfecting proce…
    • WI20-009 Jun 10, 2020 · Service Bulletin/Repair Instructions
      Warranty Information Letter for a Warranty Service Replacement Engine Program Clarification. Detroit established the Warranty Service Replacement Engine Program to support an unrepairable catastrophic engine failure due to manufacturing defect. To improve u…
    • WI20-008 Apr 27, 2020 · Service Bulletin/Repair Instructions
      Warranty Information Letter for Warranty Training Online. DTNA is pleased to announce the release of new Warranty-related training videos. The videos provide Warranty content in short instructional videos that are available on demand through the AftermarkeT…
    • WP20-007 Apr 23, 2020 · Service Bulletin/Repair Instructions
      Warranty Policy Letter for Chassis Progressive Damage Policy Change. Effective for repair orders opened on or after April 27, 2020, if an Authorized Service Location installed a part which later has a warrantable failure, progressive damage and labor may be…
    • WP20-006 Apr 23, 2020 · Service Bulletin/Repair Instructions
      Warranty Policy Letter for Handling for Authorized Service Location Part Transfers. To promote 24-hour throughput and maximum efficiency, DTNA is adjusting multiple handling policies: Launching a new handling allowance for parts ordered from another Author…
    • WP20-005 Apr 22, 2020 · Service Bulletin/Repair Instructions
      Warranty Policy Letter for Handling Change: Over the Counter Aftermarket Parts Replacement Program. DTNA is pleased to announce that handling will increase to 33% for Misc. Replacement Part type claims filed under the Over the Counter (OTC) Aftermarket Part…
    • 03.2020 Campaign Mar 17, 2020 · Service Bulletin/Repair Instructions
      Open recall and Field service Campaigns report send out to Dealers, General Managers, Service managers and warranty managers.
    • WP20-002 Mar 17, 2020 · Service Bulletin/Repair Instructions
      Warranty Policy Letter explaining the Warranty Department is aligning with the frame rail repair policy, published in DTNA Workshop Manuals, which states that there are very few cases in which welding a heat-treated frame rail is allowed. Therefore, before …
    • 02.2020 Campaign Mar 4, 2020 · Service Bulletin/Repair Instructions
      Open recall and Field service Campaigns report send out to Dealers, General Managers, Service managers and warranty managers
    • SB54-290 Feb 14, 2020 · Service Bulletin/Repair Instructions
      Service Bulletin for Guidelines for Repairing or Replacing an Electrical Harness. Use the guidelines in this bulletin to determine if a damaged electrical harness should be repaired or replaced.
    • WP20-001REV Feb 14, 2020 · Service Bulletin/Repair Instructions
      Revision to a Warranty Policy Letter announcing the One Stop Supplier Extended Program Launch. The One Stop Supplier Extended Program streamlines the claim filing process because with One Stop Supplier Extended, the service network will file claims for some…
    • SS1034619 Jan 27, 2020 · Service Bulletin/Repair Instructions
      Service Solution for TBB 05G and 05K AC belt alignment improvement.This Service Solution is provided to assist Dealers/Customers in resolving the issue of AC Belt not properly aligned or excessive belt wear.
    • WP20-001 Jan 20, 2020 · Service Bulletin/Repair Instructions
      Warranty Policy Letter announcing the One Stop Supplier Extended Program Launch. The One Stop Supplier Extended Program streamlines the claim filing process because with One Stop Supplier Extended, the service network will file claims for some supplier-supp…
    • SB98-015 Nov 19, 2019 · Service Bulletin/Repair Instructions
      Service Bulletin for paint finish standards. Delfleet One has been added for aftermarket use. This version replaces service bulletin dated May 5, 2017.
    Source: NHTSA manufacturer communications files.