2021 THOMAS BUILT BUSES SAF-T-LINER EFX

7 recalls — 0 complaints — 62 TSBs

EQUIPMENT:OTHER:LABELS

Defect Description

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. A... Read more

Consequence

Emergency exit labels that are difficult to read can prevent or delay the use of the emergency exit, increasing the risk of injury.

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.

27,494 vehicles affected

Manufacturer: Daimler Trucks North America, LLC

STRUCTURE:BODY:ROOF AND PILLARS

Defect Description

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... Read more

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.

17,613 vehicles affected

Manufacturer: Daimler Trucks North America, LLC

SEATS

Defect Description

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.

1,806 vehicles affected

Manufacturer: Daimler Trucks North America, LLC

SEATS:CRITICAL FASTENERS

Defect Description

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 wi... Read more

Consequence

A seat with broken mounting bolts may not properly restrain an occupant in a crash, increasing their risk of injury.

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.

539 vehicles affected

Manufacturer: Daimler Trucks North America, LLC

ELECTRICAL SYSTEM:ALTERNATOR/GENERATOR/REGULATOR

Defect Description

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.

1,434 vehicles affected

Manufacturer: Daimler Trucks North America, LLC

STEERING:LINKAGES:TIE ROD ASSEMBLY

Defect Description

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

A fractured bolt may cause a loss of steering, increasing the risk of a crash.

Remedy

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.

1,252 vehicles affected

Manufacturer: Daimler Trucks North America, LLC

SERVICE BRAKES, HYDRAULIC:FOUNDATION COMPONENTS:DISC:CALIPER

Defect Description

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

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

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.

6 vehicles affected

Manufacturer: Daimler Trucks North America, LLC

No complaints found for this vehicle.

Technical Service Bulletins — 2021 THOMAS BUILT BUSES SAF-T-LINER EFX

62 manufacturer communications from 43 unique bulletins. TSBs describe known problems and recommended fixes from the manufacturer.

Most Affected Components

Component	Bulletins
350000 EQUIPMENT	19
355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL	9
060000 ENGINE AND ENGINE COOLING	6
100000 POWER TRAIN	5
110000 ELECTRICAL SYSTEM	4
356000 EQUIPMENT ADAPTIVE/MOBILITY	3
010000 STEERING	3
020000 SUSPENSION	2

060000 ENGINE AND ENGINE COOLING

Important Campaign Information letter for FL974 - Revised Bulletin & Population

060000 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 Con

060000 ENGINE AND ENGINE COOLING

Emissions Recall: Cummins DEF Sensor Shortage

350000 EQUIPMENT

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-re

110000 ELECTRICAL SYSTEM

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

Important Campaign Information Letter for Dealer Travel for Campaign Performance a?? TBB.

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

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 c

060000 ENGINE AND ENGINE COOLING

Thomas Built Buses Product Awareness Bulletin on MY2021 Cummins B6.7 Containment Plan

100000 POWER TRAIN

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

010000 STEERING

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 A

100000 POWER TRAIN

350000 EQUIPMENT

356000 EQUIPMENT ADAPTIVE/MOBILITY

350000 EQUIPMENT

Thomas Built Buses Product Awareness Bulletin on Lettering Changes - Notification

010000 STEERING

Tech Talk discussion about power steering fluid.

350000 EQUIPMENT

Tech Talk discussion about power steering fluid.

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

Warranty Information Letter informing that to ensure that DTNA policies and service network practices align, the Warranty Department will be revising the Warranty Manual.

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

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 a

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

Important Campaign Information letter announcing Dealer Travel for Campaign Performance. This letter is to announce a reimbursement available to dealers for travel to a customer??A???A???A???A???A???A???A???A???A???A???A???A?s location to p

350000 EQUIPMENT

Thomas Built Buses Product Awareness Bulletin on Heater Hose Changes

356000 EQUIPMENT ADAPTIVE/MOBILITY

Thomas Built Buses Product Awareness Bulletin on Heater Hose Changes

060000 ENGINE AND ENGINE COOLING

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

350000 EQUIPMENT

220000 SEATS

Thomas Built Buses Product Awareness Bulletin on National Drivera??s Seat Update

162300 STRUCTURE:BODY:DOOR

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 d

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

Thomas Built Buses Product Awareness Bulletin on a??School Busa?? Lettering

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

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 throug

350000 EQUIPMENT

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

350000 EQUIPMENT

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 fr

350000 EQUIPMENT

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)

350000 EQUIPMENT

Thomas Built Buses Product Awareness Bulletin on Defender Composite Stop Arm Changes

130000 VISIBILITY

Thomas Built Buses Product Awareness Bulletin on PV360 NS Camera a?? Type D

060000 ENGINE AND ENGINE COOLING

Thomas Built Buses Product Awareness Bulletin on Buy America Cummins B6.7 Engine

160000 STRUCTURE

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. T

350000 EQUIPMENT

Open recall and Field service Campaigns report send out to Dealers, General Managers, Service managers and warranty managers.

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

350000 EQUIPMENT

Thomas Built Buses Product Awareness Bulletin on Roof Top Lettering (Addendum)

350000 EQUIPMENT

Open recall and Field service Campaigns report send out to Dealers, General Managers, Service managers and warranty managers

110000 ELECTRICAL SYSTEM

Thomas Built Buses Product Awareness Bulletin on 12V Outlets Update

020000 SUSPENSION

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 fil

100000 POWER TRAIN

350000 EQUIPMENT

270000 LANE DEPARTURE

110000 ELECTRICAL SYSTEM

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.

110000 ELECTRICAL SYSTEM

Thomas Built Buses Product Awareness Bulletin on Power Outlet

350000 EQUIPMENT

Thomas Built Buses Product Awareness Bulletin on Power Outlet

100000 POWER TRAIN

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 s

980000 UNKNOWN OR OTHER

270000 LANE DEPARTURE

020000 SUSPENSION

350000 EQUIPMENT

Thomas Built Buses Product Awareness Bulletin on Data Book Update

350000 EQUIPMENT

Thomas Built Buses Product Awareness Bulletin on Lettering Update

355200 EQUIPMENT:OTHER:OWNERS/SERVICE/OTHER MANUAL

Warranty Policy letter announcing service locations have 90 calendar days from delivery to open a repair order which Identifies and addresses discrepancies from the sales order.

100000 POWER TRAIN

Thomas Built Buses Product Awareness Bulletin on Allison 7 Year Warranty

220000 SEATS

Thomas Built Buses Product Awareness Bulletin on Freedman Seating Update

350000 EQUIPMENT

Thomas Built Buses Product Awareness Bulletin on Slide a?? n Click Update

120000 EXTERIOR LIGHTING

Thomas Built Buses Product Awareness Bulletin on Lamp Monitors

251000 ELECTRONIC STABILITY CONTROL:AUTOMATIC (ASC)

Thomas Built Buses Product Awareness Bulletin on ESC Update EFX and HDX

356000 EQUIPMENT ADAPTIVE/MOBILITY

Thomas Built Buses Product Awareness Bulletin on Corrosion Protection EFX & HDX

350000 EQUIPMENT

Thomas Built Buses Product Awareness Bulletin on Corrosion Protection EFX & HDX

070000 FUEL SYSTEM, GASOLINE

Thomas Built Buses Product Awareness Bulletin on Corrosion Protection EFX & HDX

THOMAS BUILT BUSES SAF-T-LINER EFX — All Years Overview

Complete safety history for the THOMAS BUILT BUSES SAF-T-LINER EFX across all model years (2006–2026).

141 Total Recalls

1 Total Complaints

0 Investigations

0 Reported Crashes

0 Reported Fires

0 Reported Deaths

THOMAS BUILT BUSES SAF-T-LINER EFX — Year by Year

Compare recalls and complaints across model years. Click any year to see full details.

Year	Recalls	Complaints
2026	2	0	View
2025	5	0	View
2024	2	0	View
2023	6	0	View
2022	6	0	View
2021 (current)	7	0
2020	8	0	View
2019	10	0	View
2018	14	0	View
2017	16	0	View
2016	12	0	View
2015	12	0	View
2014	15	0	View
2013	9	0	View
2012	4	0	View
2011	3	0	View
2010	2	0	View
2009	2	1	View
2008	2	0	View
2007	2	0	View
2006	2	0	View

Other THOMAS BUILT BUSES Models

Model	Recalls	Complaints
C2	0	0	View
CL-960	0	0	View
CONVENTIONAL	0	0	View
EF	0	0	View
ER	0	0	View
FS-65	0	0	View
FS65	0	0	View
HDX	0	0	View