No complaints are listed for the 2020 Thomas Built Buses SAF-T-Liner EFX. 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 EFX.
Model-generated complaint tags: No complaints are listed for tagging.
Recalls
See new recalls and investigations this week.
8 recalls.
Date: 2024-07-24. Systems: EQUIPMENT.
Defect: 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 (excerpt)
Consequence: Emergency exit labels that are difficult to read can prevent or delay the use of the emergency exit, increasing the risk of injury. (excerpt)
Remedy: 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. (excerpt)
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: 2022-07-19. 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: 2022-03-11. Systems: SEATS.
Defect: Daimler Trucks North America, LLC (DTNA) is recalling certain 2020-2023 Thomas Built Buses Saf-T-Liner EFX School Buses. The passenger seat mounting bolts may break due to improperly placed mounting that allows contact with the chassis cross member bolts. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard numbers 210, "Seat Belt Assembly Anchor (excerpt)
Consequence: A seat with broken mounting bolts may not properly restrain an occupant in a crash, increasing their risk of injury. (excerpt)
Remedy: Dealers will add a spacer to provide proper clearance between the passenger seat mounting and chassis cross member bolts, free of charge. Owner notification letters were mailed June 2, 2022. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-921. (excerpt)
Do not drive: No. Park outside: No.
Date: 2021-11-02. Systems: ELECTRICAL SYSTEM.
Defect: 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: A loose power cable connection may cause electrical arcing, which can increase the risk of a fire.
Remedy: 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.
Do not drive: No. Park outside: No.
Date: 2020-03-03. Systems: SERVICE BRAKES, AIR.
Defect: Daimler Trucks North America LLC (DTNA) is recalling certain 2019-2020 Thomas Built Saf-T-Liner HDX, EFX, and C2 school buses equipped with air disc brakes. The brake caliper mounting bolts may have been insufficiently tightened.
Consequence: Loose brake caliper mounting bolts can reduce brake effectiveness, increasing the risk of a crash.
Remedy: DTNA will notify owners, and dealers will inspect and repair the vehicles, free of charge. The recall began May 2, 2020. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-845.
Do not drive: No. Park outside: No.
Date: 2019-10-04. Systems: SEATS.
Defect: Daimler Trucks North America LLC (DTNA) is recalling certain 2014-2020 Thomas Built Saf-T-Liner EFX, Minotour, Saf-T-Liner C2, and Saf-T-Liner HDX school buses equipped with SynTec S3B or S3C seats. The seats may have been manufactured with styrene blocks that may not provide sufficient impact absorption in certain specific areas around the steel seat frame of the back support. As such, these v (excerpt)
Consequence: The lack of impact absorption increases the risk of injury in the event of a crash. (excerpt)
Remedy: DTNA will notify owners, and dealers will install additional impact material between the re-bond back and the vinyl back cover to increase the amount of absorption, free of charge. DTNA issued owners an interim notification on November 29, 2019. The recall began June 22, 2020. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-832. (excerpt)
Do not drive: No. Park outside: No.
Date: 2019-07-25. Systems: STRUCTURE.
Defect: Daimler Trucks North America LLC (DTNA) is recalling certain 2019-2020 Thomas Built Minotour, Saf-T Liner C2, Saf-T Liner EFX, and Saf-T Liner HDX school buses equipped with Safe Fleet Prolo Roof Escape hatches. Due to a manufacturing issue, the roof hatch external handle may unexpectedly break under reasonable use.
Consequence: If the roof hatch external handle breaks, in the event of an emergency, the hatch cannot be easily opened from outside the vehicle, increasing the risk of injury.
Remedy: DTNA will notify owners, and dealers will install a new handle, free of charge. Owners were issued an interim notification on September 13, 2019. The recall began November 15, 2019. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-819.
Do not drive: No. Park outside: No.
Manufacturer communications
64 manufacturer communications.
Communications by system| System | Count |
|---|
| EQUIPMENT | 36 |
|---|
| ENGINE AND ENGINE COOLING | 9 |
|---|
| ELECTRICAL SYSTEM | 8 |
|---|
| POWER TRAIN | 5 |
|---|
| ENGINE | 4 |
|---|
| STEERING | 4 |
|---|
| EQUIPMENT ADAPTIVE/MOBILITY | 3 |
|---|
| EXTERIOR LIGHTING | 3 |
|---|
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
11031983
Date: 2026-04-24. Type: Other. Systems: VISIBILITY/WIPER.
Service Solution for EFX AC Upper bracket TBB 130987 replaced with TBB 248310
11014787
Date: 2025-02-05. Type: Other. Systems: EXTERIOR LIGHTING.
Service Solution for HDX / EFX front lighting replacement
11011106
Date: 2024-11-20. Type: Other. Systems: STEERING.
Service Solution for Power steering Pump TBB 61280827 replacement with TBB 246122
11011076
Date: 2024-11-11. Type: Warranty Program/Extension. Systems: ENGINE.
Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair Time Updates
11010192
Date: 2024-10-21. Type: Other. Systems: ENGINE.
Extended Warranty Policy for certain Cummins B6.7 engines for TBB vehicle DEF headers for EPA and CARB Emissions Reporting
11010186
Date: 2024-10-17. Type: Other. Systems: ENGINE.
CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check.
11008508
Date: 2024-09-16. Type: Other. Systems: ENGINE.
Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines
10251200
Date: 2024-02-20. Type: Service Bulletin/Repair Instructions. Systems: ENGINE AND ENGINE COOLING.
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 added, as shown in Table 2, to be used when a
10251202
Date: 2024-02-20. Type: Service Bulletin/Repair Instructions. Systems: ENGINE AND ENGINE COOLING.
Important Campaign Information letter for FL974 - Revised Bulletin & Population