2021 Thomas Built Buses SAF-T-Liner HDX: recalls and complaints

NHTSA lists 16 recall campaigns for the 2021 Thomas Built Buses SAF-T-Liner HDX. The newest campaign is 24V555000. NHTSA received the report on 24 Jul 2024. The NHTSA record gives the component Equipment / Other / Labels. NHTSA has no complaint on file for this model year.

The NHTSA recall file shows no do-not-drive advisory and no park-outside advisory on these campaigns.

This page cannot show if a recall applies to one vehicle. The NHTSA VIN lookup shows the unrepaired recalls of one vehicle.

Remedy of the newest campaign, 24V555000, in the NHTSA record

Dealers will correct the lettering, free of charge. Owner notification letters were mailed September 5, 2024. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL918.

NHTSA VIN lookup

Complaint information entered into NHTSA’s Office of Defects Investigation vehicle owner's complaint database is used with other data sources to identify safety issues that warrant investigation and to determine if a safety-related defect trend exists.
NHTSA publishes these words. Source: NHTSA Datasets and APIs, section Complaints, read on 1 Oct 2026. Complaint file through 30 Sep 2026. Recall file through 30 Sep 2026.

Since the last update

No tracked figure of this page changed in a data update. What the log tracks

All updates to the register

Recall campaigns

16 campaigns, newest first. 65,305 units in total.

24V55500024 Jul 2024Equipment / Other / Labels
22V76200012 Oct 2022Structure / Body / Roof and Pillars
22V68800014 Sep 2022Structure / Body
22V63400019 Aug 2022Seats / Barriers
22V51000019 Jul 2022Seats / Mid/Rear Assembly
22V27100022 Apr 2022Electrical System / 12v/24v/48v Battery / Cables
22V27200022 Apr 2022Electrical System / 12v/24v/48v Battery / Cables
21V91500022 Nov 2021Equipment / Other / Labels
21V8500002 Nov 2021Electrical System / Alternator/Generator/Regulator
21V66000025 Aug 2021Steering / Hydraulic Power Assist / Hose, Piping, and Connections
21V65900025 Aug 2021Steering / Hydraulic Power Assist / Hose, Piping, and Connections
21V46200017 Jun 2021Seats
21V37000019 May 2021Steering / Linkages / Tie Rod Assembly
21V3270007 May 2021Fuel System, Diesel / Fuel Injection System / Fuel Rail
21V25500012 Apr 2021Steering / Critical Fasteners
21V01700020 Jan 2021Service Brakes, Hydraulic / Foundation Components / Disc / Caliper

24V555000Received 24 Jul 2024. 27,494 units.
Equipment / Other / Labels
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain Thomas Built Buses 2019-2022 Saf-T-Liner C2, Saf-T-Liner EFX, Saf-T-Liner HDX, Minotour DRW, 2020-2022 Saf-T-Liner C2 Jouley, and Minotour SRW school buses. The Emergency Exit Label lettering is too small and may be difficult to read. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 217, "Bus Emergency Exits and Window Retention and Release."
Consequence, in the NHTSA record
Emergency exit labels that are difficult to read can prevent or delay the use of the emergency exit, increasing the risk of injury.
Remedy, in the NHTSA record
Dealers will correct the lettering, free of charge. Owner notification letters were mailed September 5, 2024. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL918.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL918. Owner notification date in the NHTSA record: 5 Sep 2024.
22V762000Received 12 Oct 2022. 17,613 units.
Structure / Body / Roof and Pillars
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2011-2023 Thomas Built EFX and HDX school buses. The exterior roof panel was manufactured with insufficient joint strength. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 221, "School Bus Body Joint Strength."
Consequence, in the NHTSA record
A school bus exterior roof panel with insufficient joint strength may separate during a crash, increasing the risk of injury.
Remedy, in the NHTSA record
Dealers will add additional mechanical fasteners to secure the joints, free of charge. Owner notification letters were mailed June 2, 2023. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL957.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL957. Owner notification date in the NHTSA record: 2 Jun 2023.
22V688000Received 14 Sep 2022. 1,259 units.
Structure / Body
Defect, in the NHTSA record
Daimler Trucks North America LLC (DTNA) is recalling certain 2020-2023 Thomas Built Saf-T-Liner HDX school buses. The rear exterior side-body panel was manufactured with insufficient joint strength. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 221, "School Bus Body Joint Strength."
Consequence, in the NHTSA record
A school bus panel with insufficient joint strength may separate during a crash, increasing the risk of injury.
Remedy, in the NHTSA record
Dealers will add additional mechanical fasteners to secure the joints, free of charge. Owner notification letters were mailed November 11, 2022. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall FL953.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL953. Owner notification date in the NHTSA record: 11 Nov 2022.
22V634000Received 19 Aug 2022. 7,561 units.
Seats / Barriers
Defect, in the NHTSA record
Daimler Trucks North America LLC (DTNA) is recalling certain 2011-2021 Thomas Built Saf-T Liner HDX school buses. The forward seat barriers may not provide sufficient protection to passengers. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 222, "School Bus Passenger Seating and Crash Protection."
Consequence, in the NHTSA record
Occupants may collide with the front seat barriers with more force than intended during a crash, increasing the risk of injury.
Remedy, in the NHTSA record
Dealers will install a spacer between the seat rail and the seat barrier, free of charge. Owner notification letters were mailed August 25, 2023. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL843. This recall replaces NHTSA recall 19V899.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL843. Owner notification date in the NHTSA record: 25 Aug 2023.
22V510000Received 19 Jul 2022. 1,806 units.
Seats / Mid/Rear Assembly
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2014-23 Thomas Built Buses HDX and 2014-22 EFX school buses equipped with 39-inch S3C seat frames and 3-point flex seatbelts. The passenger seat frames may crack and rotate from fatigue.
Consequence, in the NHTSA record
Cracked passenger seat frames may not adequately secure passengers in the event of a crash, increasing the risk of injury.
Remedy, in the NHTSA record
Dealers will secure the seat frames with brackets, free of charge. Owner notification letters were mail December 4, 2023. Owners may contact DTNA's customer service at 1-800-547-0712. DTNA's number for this recall is FL946.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL946. Owner notification date in the NHTSA record: 4 Dec 2023.
22V271000Received 22 Apr 2022. 2,943 units.
Electrical System / 12v/24v/48v Battery / Cables
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2019-2023 Thomas Built Bus HDX school buses. The positive battery cable may be routed improperly, allowing it to chafe against the transmission oil cooler hoses, which can cause an electrical short circuit.
Consequence, in the NHTSA record
An electrical short circuit can increase the risk of a fire.
Remedy, in the NHTSA record
Dealers will inspect and repair the cable routing, as necessary, free of charge. Owner notification letters were mailed January 20, 2023. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL928.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL928. Owner notification date in the NHTSA record: 20 Jan 2023.
22V272000Received 22 Apr 2022. 138 units.
Electrical System / 12v/24v/48v Battery / Cables
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2019-2023 Thomas Built Bus HDX commercial buses. The positive battery cable may be routed improperly, allowing it to chafe against the transmission oil cooler hoses, which can cause an electrical short circuit.
Consequence, in the NHTSA record
An electrical short circuit can increase the risk of a fire.
Remedy, in the NHTSA record
Dealers will inspect and repair the cable routing, as necessary, free of charge. Owner notification letters were mailed January 20, 2023. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL929.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL928. Owner notification date in the NHTSA record: 20 Jan 2023.
21V915000Received 22 Nov 2021. 1 unit.
Equipment / Other / Labels
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling one 2021 Thomas Built Buses Saf-T-Liner HDX transit bus. The gross axle weight rating (GAWR) may be improperly stated on the label. As such, this vehicle fails to comply with the requirements of Federal Motor Vehicle Safety Standard number 136, "Electronic Stability Control Systems on Heavy Vehicles."
Consequence, in the NHTSA record
The operator may overload the vehicle while referencing the incorrect label, increasing the risk of a crash.
Remedy, in the NHTSA record
A dealer will apply a new label, free of charge. The owner notification letter is expected to be mailed January 16, 2022. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL911.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL911. Owner notification date in the NHTSA record: 12 Jan 2022.
21V850000Received 2 Nov 2021. 1,434 units.
Electrical System / Alternator/Generator/Regulator
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2020-2022 Thomas Built EFX and HDX school buses. The nut for the power cable stud on the alternator may not have been tightened properly, which can cause a loose cable connection.
Consequence, in the NHTSA record
A loose power cable connection may cause electrical arcing, which can increase the risk of a fire.
Remedy, in the NHTSA record
Dealers will inspect the alternator power cable connection and tighten it if necessary, free of charge. Owner notification letters were mailed on December 17, 2021. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL904.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL904. Owner notification date in the NHTSA record: 17 Dec 2021.
21V660000Received 25 Aug 2021. 114 units.
Steering / Hydraulic Power Assist / Hose, Piping, and Connections
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2016-2021 Thomas Built Buses Saf-T-Liner HDX transit buses equipped with an ISL or L9 engine. The power steering hose may be routed with inadequate clearance between the hose and the power cables, potentially damaging the power steering hose.
Consequence, in the NHTSA record
A damaged power steering hose can leak, and increase the risk of a fire.
Remedy, in the NHTSA record
DTNA will inspect the power steering hose routing and modify it as necessary, free of charge. Owner notification letters are expected to be mailed on October 17, 2021. Owners may contact DTNA's customer service at 1-800-547-0712. DTNA's number for this recall is FL898.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL898. Owner notification date in the NHTSA record: 15 Oct 2021.
21V659000Received 25 Aug 2021. 1,934 units.
Steering / Hydraulic Power Assist / Hose, Piping, and Connections
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2016-2021 Thomas Built Buses Saf-T-Liner HDX school buses equipped with an ISL or L9 engine. The power steering hose may be routed with inadequate clearance between the hose and the power cables.
Consequence, in the NHTSA record
A worn power steering hose increases the risk of a fire.
Remedy, in the NHTSA record
DTNA will inspect the power steering hose routing and modify it as necessary, free of charge. Owner notification letters are expected to be mailed on October 17, 2021. Owners may contact DTNA's customer service at 1-800-547-0712. DTNA's number for this recall is FL898.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL898. Owner notification date in the NHTSA record: 15 Oct 2021.
21V462000Received 17 Jun 2021. 9 units.
Seats
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2018-2022 Thomas Built Saf-T-Liner HDX School Buses. These school buses may have been manufactured with an incorrect passenger seat configuration that does not provide the proper amount of seat back protection. As such, these school buses fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 222, "School Bus Passenger Seating and Crash Protection."
Consequence, in the NHTSA record
In the event of a crash, the seats may not adequately protect the occupants, increasing the risk of injury.
Remedy, in the NHTSA record
Dealers will replace the rear passenger seats, free of charge. No owner notification will be distributed, all units were repaired on August 12, 2021. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-892.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL-892. Owner notification date in the NHTSA record: 12 Aug 2021.
21V370000Received 19 May 2021. 479 units.
Steering / Linkages / Tie Rod Assembly
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2021-2022 Thomas Built Saf-T-Liner HDX School Buses and Saf-T-Liner C2 School Buses. The tie rod clamps may be loose, which could result in loose tie rod ends that could break or detach.
Consequence, in the NHTSA record
Detached or broken tie rod ends can result in steering loss, increasing the risk of a crash.
Remedy, in the NHTSA record
Dealers will replace the tie rod clamp bolts and nuts, free of charge. Owner notification letters were mailed December 23, 2021. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-888.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL-888. Owner notification date in the NHTSA record: 23 Dec 2021.
21V327000Received 7 May 2021. 1,262 units.
Fuel System, Diesel / Fuel Injection System / Fuel Rail
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DNTA) is recalling certain 2018-2021 Thomas Built Buses Saf-T-Liner HDX School Buses. The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
Consequence, in the NHTSA record
A fuel leak in the presence of an ignition source increases the risk of a fire.
Remedy, in the NHTSA record
Dealers will replace the fuel rail and fuel lines, free of charge. Interim owner notification letters were mailed on June 21, 2021. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-886.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL-886. Owner notification date in the NHTSA record: 29 Oct 2021.
21V255000Received 12 Apr 2021. 1,252 units.
Steering / Critical Fasteners
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2021-2022 Thomas Built Buses Saf-T-Liner C2, Saf-T-Liner EFX, and Saf-T-Liner HDX school buses. The steering arm and tie rod bolts may have a defective seam that can fracture.
Consequence, in the NHTSA record
A fractured bolt may cause a loss of steering, increasing the risk of a crash.
Remedy, in the NHTSA record
DTNA will notify owners, and dealers will replace the tie rod arm bolts and steering arm, free of charge. The recall began on June 10, 2021. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-884.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL-884. Owner notification date in the NHTSA record: 10 Jun 2021.
21V017000Received 20 Jan 2021. 6 units.
Service Brakes, Hydraulic / Foundation Components / Disc / Caliper
Defect, in the NHTSA record
Daimler Trucks North America, LLC (DTNA) is recalling certain 2021 Thomas Built Buses Saf-T-Liner HDX and EFX school buses. On certain vehicles, one of the six brake caliper mounting bolts on the driver side steer axle may have been incorrectly tightened.
Consequence, in the NHTSA record
The loose bolt could result in the other caliper bolts to loosen. Insufficiently tightened bolts may not provide adequate clamping force between the brake caliper and brake anchor plate, resulting in reduced brake effectiveness, increasing the risk of a crash.
Remedy, in the NHTSA record
DTNA will notify owners, and dealers will inspect and repair as necessary, free of charge. The recall began March 17, 2021. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-873.
Report filed by Daimler Trucks North America, LLC. Manufacturer campaign number FL-873. Owner notification date in the NHTSA record: 17 Mar 2021.

The campaign number opens the NHTSA record. Each quotation is the text of the NHTSA recall file.

Recall campaign: One recall in the NHTSA recall file, with one campaign number. A campaign can name many makes, models and model years.

Units: The number of vehicles or products that a recall can include. The manufacturer or the firm reports the number to the agency.

Complaints by component

The NHTSA complaint file has no complaint for this model year.

Investigations

The NHTSA investigation file has no investigation that names this model year.

Investigation: A study of a possible safety defect by the NHTSA Office of Defects Investigation. An investigation with no closing date in the NHTSA file is open.

Other model years

The number under each year is the number of recall campaigns.

A year without a link has fewer than 2 campaigns and fewer than 25 complaints. It has no page.

Follow by RSS:Thomas Built Buses recallsVehicle recalls

Official channels

NHTSA VIN lookupNHTSA shows the unrepaired recalls of one vehicle from its VIN or its license plate.
NHTSA: report a safety problemThe NHTSA form for a complaint about a vehicle, a tire, a child seat or equipment.
NHTSA page of the 2021 Thomas Built Buses SAF-T-Liner HDXThe recalls, the complaints and the investigations that NHTSA shows for this model year.

Cite this page

Recall Register. 2021 Thomas Built Buses SAF-T-Liner HDX: recalls and complaints. https://recallregister.com/vehicle/thomas-built-buses/saf-t-liner-hdx/2021/. Source: NHTSA Office of Defects Investigation, recall, complaint and investigation files. Data through 30 Sep 2026.

Sources

Source: NHTSA Office of Defects Investigation
Licence: US government work, public domain
Recall file through: 30 Sep 2026
Complaint file through: 30 Sep 2026
First complaint in the file: 1 Jan 1995
Manufacturer in the recall file: Daimler Trucks North America, LLC

The NHTSA record is the authority. A complaint count is the number of different complaint numbers for the make, the model and the model year. How the register is made. Report an error.

Questions

How many units are in the recall campaigns for the 2021 Thomas Built Buses SAF-T-Liner HDX?: 65,305 units in 16 campaigns. A campaign can name other models and model years, and its units include them.
How many recall campaigns does the Thomas Built Buses SAF-T-Liner HDX have for all model years?: NHTSA lists 81 recall campaigns for the Thomas Built Buses SAF-T-Liner HDX, model years 2002 to 2026. 16 of them name the 2021 model year.
Is an NHTSA investigation of the 2021 Thomas Built Buses SAF-T-Liner HDX open?: The NHTSA investigation file has no investigation that names this model year.