No complaints are listed for the 2023 Thomas Built Buses SAF-T-Liner HDX. NHTSA's API and bulk file list none in this build.
Data build 2026-10-10.
NHTSA lists this vehicle as THOMAS BUILT BUSES SAF-T-LINER HDX.
Model-generated complaint tags: No complaints are listed for tagging.
Recalls
See new recalls and investigations this week.
8 recalls.
Date: 2026-02-13. Systems: ENGINE AND ENGINE COOLING.
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain Thomas Built Buses 2023-2025 Saf-T-Liner EFX and 2023-2026 Saf-T-Liner HDX vehicles. The heater hose clamps may not have been tightened properly, causing the hose to disconnect and leak heating coolant inside the passenger compartment.
Consequence: Contact with hot heating coolant may burn occupants, increasing the risk of injury.
Remedy: Dealers will inspect and replace the heater hose clamps, as necessary, free of charge. Owner notification letters were mailed April 10, 2026. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is F1030.
Do not drive: No. Park outside: No.
Date: 2026-02-13. Systems: ENGINE AND ENGINE COOLING.
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain Thomas Built Buses 2023-2026 Saf-T-Liner EFX and Saf-T-Liner HDX school buses. The heater hose clamps may not have been tightened properly, causing the hose to disconnect and leak heating coolant inside the passenger compartment.
Consequence: Contact with hot heating coolant may burn occupants, increasing the risk of injury.
Remedy: Dealers will inspect and replace the heater hose clamps, as necessary, free of charge. Owner notification letters were mailed April 10, 2026. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is F1030.
Do not drive: No. Park outside: No.
Date: 2022-10-12. Systems: STRUCTURE.
Defect: 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: A school bus exterior roof panel with insufficient joint strength may separate during a crash, increasing the risk of injury.
Remedy: 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.
Do not drive: No. Park outside: No.
Date: 2022-09-14. Systems: STRUCTURE.
Defect: 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: A school bus panel with insufficient joint strength may separate during a crash, increasing the risk of injury.
Remedy: 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.
Do not drive: No. Park outside: No.
Date: 2022-07-29. Systems: ENGINE AND ENGINE COOLING.
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain 2023 Thomas Built Saf-T-Liner HDX and Saf-T-Liner C2 school buses. The engine control module (ECM) may experience an internal short-circuit, which can result in an unexpected engine shut down.
Consequence: Unexpected engine shut down can increase the risk of a crash. Additionally, a disabled school bus may require an evacuation procedure in an uncontrolled traffic situation, increasing the risk of injury to passengers.
Remedy: Cummins will replace the ECM, free of charge. Owner notification letters are expected to be mailed September 26, 2022. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-949.
Do not drive: No. Park outside: No.
Date: 2022-07-19. Systems: SEATS.
Defect: 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: Cracked passenger seat frames may not adequately secure passengers in the event of a crash, increasing the risk of injury.
Remedy: 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.
Do not drive: No. Park outside: No.
Date: 2022-04-22. Systems: ELECTRICAL SYSTEM.
Defect: 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: An electrical short circuit can increase the risk of a fire.
Remedy: 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.
Do not drive: No. Park outside: No.
Date: 2022-04-22. Systems: ELECTRICAL SYSTEM.
Defect: 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: An electrical short circuit can increase the risk of a fire.
Remedy: 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.
Do not drive: No. Park outside: No.
Manufacturer communications
26 manufacturer communications.
Communications by system| System | Count |
|---|
| ENGINE | 12 |
|---|
| UNKNOWN OR OTHER | 4 |
|---|
| EXTERIOR LIGHTING | 2 |
|---|
| SEATS | 2 |
|---|
| VISIBILITY/WIPER | 2 |
|---|
| WHEELS | 2 |
|---|
| ELECTRICAL SYSTEM | 1 |
|---|
| VEHICLE SPEED CONTROL | 1 |
|---|
11035528
Date: 2026-07-06. Type: Service Bulletin/Repair Instructions. Systems: UNKNOWN OR OTHER.
Technical Service Bulletin for Electrical Wiring Modifications for Type DFootwell Heater
11031984
Date: 2026-04-23. Type: Other. Systems: ENGINE.
Service Solution for HDX DEF Header Service Replacement Additional Parts
11030622
Date: 2026-03-20. Type: Other. Systems: ELECTRICAL SYSTEM.
Service Solution for Timer relay TBB 202400 replacement
11023661
Date: 2025-09-09. Type: Other. Systems: UNKNOWN OR OTHER.
My communications for DTNA Announces Extended Coverage Policy Updates
11022321
Date: 2025-08-07. Type: Other. Systems: ENGINE.
Service Solution for HDX DEF Header Service Replacement Additional Parts
11019796
Date: 2025-06-17. Type: Other. Systems: UNKNOWN OR OTHER.
Service Solution for Floor Covering Bubbles
11014787
Date: 2025-02-05. Type: Other. Systems: EXTERIOR LIGHTING.
Service Solution for HDX / EFX front lighting replacement
11013293
Date: 2025-01-31. Type: Emissions. Systems: ENGINE.
Emission Recall for DD8 EGR Monitor Software Reprogramming
11013294
Date: 2025-01-31. Type: Emissions. Systems: ENGINE.
Emission Recall for DD8 EGR Monitor Software Reprogramming
11013295
Date: 2025-01-31. Type: Emissions. Systems: ENGINE.
Emission Recall for DD8 EGR Monitor Software Reprogramming