2018 Thomas Built Saf-T-Liner Efx Recalls

Recalls on record Updated July 2026

The 2018 Thomas Built Saf-T-Liner Efx has 14 NHTSA recall campaigns affecting an estimated 119,849 vehicles. Recall repairs are always free at any authorized dealer. Last updated July 5, 2026.

Recall campaigns

STRUCTURE 22V762000 2022-10-12 17,613 affected
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…

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.

SEATS 22V510000 2022-07-19 1,806 affected
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.

SEATS 19V712000 2019-10-04 53,528 affected
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…

Consequence

The lack of impact absorption increases the risk of injury in the event of a crash.

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 BRAKES, AIR 19V444000 2019-06-11 11,546 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2010-2020 Thomas Built Buses Saf-T-Liner C2, 2016-2019 HDX, and 2017-2019 EFX school buses equipped with Bendix Air Disc Brakes. The driver side rear brakes may drag.

Consequence

The dragging brakes may lead to high temperatures at the wheel end, increasing the risk of smoke and fire, possibly resulting in the bus having to be evacuated, which can increase the risk of injury.

Remedy

DTNA will notify owners, and dealers will install a new caliper with an updated clearance adjustment mechanism, free of charge. The recall began August 9, 2019. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-818.

SUSPENSION 18V914000 2018-12-19 73 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2018-2019 Thomas Built Saf-T-Liner HDX, C2, and EFX School Buses, equipped with Detroit Axle axles. The affected vehicles may have loose steering tie rod arm bolts.

Consequence

Loose tie rod arm bolts may lead to separation of the tie rod arm, affecting vehicle steering, and increasing the risk of a crash.

Remedy

DTNA has notified owners, and dealers will inspect the steering arm and tie rod arm bolts for to make sure that they are properly tightened, installing new fasteners as necessary, free of charge. The recall began February 9, 2019. Owners may contact Daimler Trucks at 1-800-547-0712. DTNA's number for this recall…

SERVICE BRAKES, AIR 18V702000 2018-10-05 1,532 affected
Defect

Daimler Trucks North America, LLC (DTNA) is recalling certain 2018-2019 Thomas Built school buses Saf-T-Liner C2, Saf-T-Liner HDX and Saf-T-Liner EFX school buses. 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 has notified owners, and dealers will check and tighten the brake caliper mounting bolts, free of charge. The recall began December 3, 2018. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-794.

SERVICE BRAKES, AIR 18V409000 2018-06-15 109 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2018 Thomas Built Buses Saf-T-Liner EFX school buses. The check valve for the air brake system may not be plumbed correctly which can cause the primary air system to not be isolated from the secondary air system.

Consequence

In the event of a rapid loss of air pressure in the secondary system, the incorrectly plumbed check valve can cause rapid air loss in both secondary and primary system, causing the parking brakes to activate suddenly. This will increase the risk of a crash.

Remedy

DTNA will notify owners, and dealers will inspect and repair the check valve as needed, free of charge. The recall began on August 12, 2018. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-774.

SERVICE BRAKES, AIR 18V410000 2018-06-15 5 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2018 Thomas Built Buses Saf-T-Liner EFX transit buses. The check valve for the air brake system may not be plumbed correctly which can cause the primary air system to not be isolated from the secondary air system.

Consequence

In the event of a rapid loss of air pressure in the secondary system, the incorrectly plumbed check valve can cause rapid air loss in both secondary and primary system, causing the parking brakes to activate suddenly. This will increase the risk of a crash.

Remedy

DTNA will notify owners, and dealers will inspect and repair the check valve as needed, free of charge. The recall began on August 12, 2018. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-774.

SERVICE BRAKES, HYDRAULIC 18V352000 2018-05-29 2,767 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2019 Thomas Built Buses Saf-T-Liner C2, Saf-T-Liner EFX and Saf-T-Liner HDX school buses equipped with air disc brakes. The brake caliper mounting bolts on these vehicles may be insufficiently tightened, allowing the bolts to loosen.

Consequence

If the brake caliper mounting bolts come loose, braking performance may be reduced, increasing the risk of a crash.

Remedy

DTNA will notify owners, and dealers will inspect the brake caliper mounting bolts and tighten them as necessary, free of charge. DTNA issued owners an interim notification on July 25, 2018. The recall began September 4, 2018. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this…

SEATS 18V253000 2018-04-19 23,102 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2014-2018 Thomas Built Buses Saf-T-Liner C2, Saf-T-Liner HDX, Saf-T-Liner EFX, and Minotour school buses equipped with S3B Restraint Wall Mounted Seats. The wall mounting bracket may crack, causing the seat to not remain secured in place in the event of a…

Consequence

In the event of a crash, if the seat does not remain secured to the wall, the occupant has an increased risk of an injury.

Remedy

DTNA will notify owners, and dealers will install an additional wall mounting bracket, free of charge. Daimler issued owners an interim notification on June 12, 2018. The recall began January 3, 2019. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-769.

SEATS 18V254000 2018-04-19 24 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2014-2018 Thomas Built Buses Saf-T-Liner C2, Saf-T-Liner EFX, Saf-T-Liner HDX, and Minotour transit buses, equipped with certain S3B Restraint Wall Mounted Seats. The wall mounting bracket may crack, causing the seat to not remain secured in place in the…

Consequence

In the event of a crash, if the seat does not remain secured to the wall, the occupant has an increased risk of an injury.

Remedy

DTNA will notify owners, and dealers will install an additional wall mounting bracket, free of charge. Daimler issued an interim notification to owners on June 15, 20 18. The recall began January 3, 2019. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-769.

SEATS 18V192000 2018-03-26 6,606 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2014-2018 Thomas Built Buses Saf-T-Liner C2, Saf-T-Liner HDX, Saf-T-Liner EFX, and Minotour school buses, equipped with certain Syntec-brand S3B, Non-Restraint, Wall Mounted Seats. The wall mounting bracket may crack, which may cause the seat to not remain…

Consequence

In the event of a crash, if the seat does not remain secured to the wall, the occupant has an increased risk of an injury.

Remedy

DTNA will notify owners, and dealers will install an additional wall mounting bracket, free of charge. DTNA issued an interim notification to owners on May 9, 2018. The recall began May 10, 2018. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-763.

SEATS 18V193000 2018-03-26 6 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2014-2018 Thomas Built Buses Saf-T-Liner C2, Saf-T-Liner HDX, Saf-T-Liner EFX, and Minotour transit buses, equipped with certain Syntec-brand S3B, Non-Restraint, Wall Mounted Seats. The wall mounting bracket may crack, which may cause the seat to not…

Consequence

In the event of a crash, if the seat does not remain secured to the wall, the occupant has an increased risk of an injury.

Remedy

DTNA will notify owners, and dealers will install an additional wall mounting bracket, free of charge. DTNA issued an interim notification to owners on May 10, 2018. The recall began May 10, 2018. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-763.

SEATS 17V313000 2017-05-11 1,132 affected
Defect

Daimler Trucks North America LLC (DTNA) is recalling certain 2014-2018 Thomas Built Buses Saf-T-Liner EFX and Saf-T-Liner HDX school buses. The occupant seats may have been installed without under-rail washers, reducing their anchorage strength.

Consequence

Without under-rail washers, in the event of a crash, the seats may come loose, increasing the risk of injury.

Remedy

DTNA will notify owners, and dealers will inspect the seats and replace the mounting hardware, as necessary, free of charge. The recall began on June 28, 2017. Owners may contact DTNA Customer Service 1-800-547-0712. DTNA's number for the recall is FL-737.

Sources & methodology

Recall, complaint, and investigation records from official NHTSA datasets (FLAT_RCL, FLAT_CMPL, FLAT_INV), synced weekly. Counts reflect NHTSA records for the 2018 Thomas Built Saf-T-Liner Efx as of July 5, 2026. Complaint narratives are consumer-submitted and unverified. This page contains ads and affiliate links. Full methodology.