Problems owners report
Complaints filed with NHTSA about the 2018 Thomas Built Buses SAF-T-Liner C2, by the system named in each complaint. One complaint can name several.
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NHTSA ODI complaints (public domain) · updated 23 Oct 2026 · 3 injuries and 0 deaths reported
Compared with other years
NHTSA ODI complaints by model year
Recalls
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 vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 222, "School Bus Passenger Seating and Crash Protection."
Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2020 Saf-T-Liner C2 school buses equipped with Detroit DD5 engines and Allison transmissions. The Flex-Plate/Torque Converter fasteners may have been insufficiently tightened.
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.
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.
Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2019 Thomas Built Buses Saf-T-Liner C2 school buses. The roof adhesive that supports the roof header may not have been properly applied.
Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2019 Thomas Built Buses Saf-T-Liner C2 transit buses. The roof adhesive that supports the roof header may not have been properly applied.
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.
Daimler Trucks North America LLC (DTNA) is recalling certain 2015-2019 Thomas Built Buses Saf-T-Liner C2 and Saf-T-Liner HDX school buses, equipped with certain S-Series and K-Series Titanium Wheelchair Lifts, models K200, K201, K550, K551, S200, S2201, S550 and S551. The wheelchair lift positioning input cam may fail while the lift is in use, allowing the platform to travel higher than the vehicle's floor height.
Daimler Trucks North America LLC (DTNA) is recalling certain 2017-2019 Thomas Built Buses Saf-T-Liner C2 school buses, equipped with S3B 45" Restraint School Bus Seats. In the event of a crash, the seat's foot may pull through the bolted joint at the bus floor. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 210, "Seat Belt Assembly Anchorages."
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.
Daimler Trucks North America LLC (DTNA) is recalling certain 2018-2019 Thomas Built Buses Saf-T-Liner C2 transit buses equipped with 2 8D batteries. The battery power cable may have inadequate clearance between the cable and the battery hold down bracket when the battery tray is pulled out for service, causing the cable to rub against the bracket.
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 crash.
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 event of a crash.
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 secured in place in the event of a crash.
Daimler Trucks North America LLC (DTNA) is recalling certain 2014-2019 Thomas Built Buses Saf-T-Liner C2 school buses equipped with propane engines. The propane fuel line may contact the j-hook body support bracket that could cause chafing resulting in a propane leak.
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 remain secured in place in the event of a crash.
Daimler Trucks North America LLC (DTNA) is recalling certain 2012-2018 Thomas Built Bus Saf-T-Liner C2 school buses. The affected vehicles are propane-powered and have propane fuel lines that may contact the transmission yoke, possibly causing a propane leak.
Daimler Trucks North America LLC (DTNA) is recalling certain 2014-2018 Thomas Built Buses Saf-T-Liner HDX and Saf-T-Liner C2 transit buses. A reinforcement bracket may be missing from the seats that have 3-point seat belts.
Daimler Trucks North America LLC (DTNA) is recalling certain 2014-2018 Thomas Built Buses Saf-T-Liner HDX and Saf-T-Liner C2 school buses. A reinforcement bracket may be missing from the seats that have 3-point seat belts.
Daimler Trucks North America LLC (DTNA) is recalling certain 2005-2018 Thomas Built Buses Saf-T-Liner C2 school buses. In the event of a crash, the wheelchair pocket track anchorage may not adequately secure a the wheelchair.
Daimler Trucks North America LLC (DTNA) is recalling certain 2005-2018 Thomas Built Buses Saf-T-Liner C2 transit buses. In the event of a crash, the wheelchair pocket track anchorage may not adequately secure a the wheelchair.
Daimler Trucks North America, LLC (DTNA) is recalling certain 2018 Thomas Built Buses Saf-T-Liner C2 transit buses equipped with two 8D batteries. The battery power cable may not have adequate clearance between the cable and battery hold down bracket. As a result, the cable can rub against the bracket damaging the cable.
Whether a recall was fixed on a particular car is known only to the manufacturer: check the VIN at nhtsa.gov/recalls.
NHTSA recalls · summaries in NHTSA's own words
Service bulletins
What Thomas Built Buses told its dealers about the 2018 Thomas Built Buses SAF-T-Liner C2: known faults, fixes and updates.
| Bulletin | Summary |
|---|---|
| 11011076 | Warranty Information letter for Detroit Line or Line Seal, High Pressure Fuel Injector Standard Repair Time Updates |
| 11010186 | CX Advocate for CARB tightening the Readiness Criteria applied to On-Board Diagnostic (OBD) test submissions for the Clean Truck Check. |
| 11008508 | Service Solution for Detroit Successful Regen Reference for GHG17 DD Engines |
| 10253878 | Extended Warranty Policy for certain Cummins B6.7 engines with SSI DEF headers for EPA and CARB Emissions Reporting |
| 10251202 | Important Campaign Information letter for FL974 - Revised Bulletin & Population |
| 10251200 | 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 new DEF header is not required. There have been some other minor changes to the work instructions and SRT times. |
| 10249516 | Emissions Recall: Cummins DEF Sensor Shortage |
| 10225494 | Thomas Built Buses Service Bulletin for DEF Connector Reinforcement Caps. Some customers experience separation of the diesel exhaust fluid (DEF) lines from the connection ports in extreme cold temperatures. To prevent this, a process was developed to secure the lines with wire ties. A new reinforcement cap has been developed to simplify this process at the DEF connection fittings. |
| 10198589 | Vibration Damper Replacement. DD5 Engines built from 4/04/2017 through 3/30/2018. |
| 10194468 | Customer Advisory Letter on Enabling the Stay Warm Feature |
| 10193744 | Thomas Built Buses Product Awareness Bulletin on RH 3 POS Switch for Electric Operated Entrance Door |
| 10193743 | Thomas Built Buses Product Awareness Bulletin on Lettering Changes - Notification |
| 10193742 | Thomas Built Buses Product Awareness Bulletin on Axial Mounted Air Disc Brake Caliper for Saf-T-Liner C2 |
| 10193741 | Thomas Built Buses Product Awareness Bulletin on Hankook DH37 Drive Tire/ Spare Tire |
| 10193738 | Thomas Built Buses Product Awareness Bulletin on Heater Hose Changes |
| 10193736 | Thomas Built Buses Product Awareness Bulletin on National Drivers Seat Update |
| 10193735 | Thomas Built Buses Product Awareness Bulletin on Jouley Warranty Update |
| 10193734 | Thomas Built Buses Product Awareness Bulletin on MY2020 DD5 Engine Updates |
| 10193733 | Thomas Built Buses Product Awareness Bulletin on Defender Composite Stop Arm Changes |
| 10193727 | Thomas Built Buses Product Awareness Bulletin on C2 Backup Camera Package Changes |
| 10193726 | Thomas Built Buses Product Awareness Bulletin on Buy America Cummins B6.7 Engine |
| 10193723 | Thomas Built Buses Product Awareness Bulletin on Roof Top Lettering (Addendum) |
| 10193722 | Thomas Built Buses Product Awareness Bulletin on 12V Outlets Update |
| 10193721 | Thomas Built Buses Product Awareness Bulletin on Defender Electric Crossing Arm |
| 10193720 | Thomas Built Buses Product Awareness Bulletin on Alcoa Wheel Update C2 |
NHTSA manufacturer communications (public domain)
NHTSA investigations
Rear Leaf Spring Fractures
NHTSA Office of Defects Investigation