Thomas Built Buses recall 26V-523: Fuel Tank Cage Incompatible with Fuel System/FMVSS 301
During a crash, an incompatible fuel tank cage and fuel system may result in a fuel leak, increasing the risk of a fire.
Campaign facts
- NHTSA campaign
- 26V523000 (26V-523)
- Manufacturer number
- F1037
- Filed by
- Daimler Trucks North America, LLC
- Report received
- August 10, 2026
- Component
- Fuel system, diesel:storage:tank assembly
- Vehicles potentially affected
- 160
- Model years
- 2024–2027
- Built between
- September 27, 2023 and May 20, 2026
- Owner letters
- September 22, 2026
- Recall initiated by
- The manufacturer
- Safety standard
- FMVSS 301
- Remedy completion rate
- 1.25% (latest quarterly report)
What is wrong
Daimler Trucks North America, LLC (DTNA) is recalling certain 2024-2027 Thomas Built Buses Saf-T-Liner C2 transit buses. The fuel tank cage material and fuel system mounting may be incompatible. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 301, "Fuel System Integrity."
The risk
During a crash, an incompatible fuel tank cage and fuel system may result in a fuel leak, increasing the risk of a fire.
Why fuel system defects matter: A fuel leak near an ignition source increases the risk of fire, and a failing fuel pump can stall the engine while driving.
The remedy
Dealers will reconfigure components to accommodate the existing fuel tank cage, free of charge. Owner notification letters were mailed September 22, 2026. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is F1037.
About the fuel system
The fuel system stores and delivers fuel to the engine; leaks and pump failures are the usual reasons for a recall.
Vehicles covered by campaign 26V-523
- Thomas Built Buses Saf-T-Liner C2 2027202620252024
What to do
- Enter your VIN in NHTSA’s lookup (below) to confirm that your vehicle is included and that the repair has not already been done.
- Call a dealer for the brand and book the repair. Quote NHTSA campaign 26V-523 and the manufacturer’s number F1037.
- If you smell fuel or see a leak, do not drive the vehicle — park it outside, away from buildings, and call the dealer.
- Safety recall repairs are carried out free of charge by the manufacturer’s dealers. If you already paid for this repair yourself, ask the manufacturer about reimbursement and keep your receipt.
Check by VIN
A campaign rarely covers every vehicle of a model year. Enter your 17-character VIN to find the recall campaigns filed for your make, model and model year. The VIN is on the driver’s side of the dashboard (visible through the windshield), on the door-jamb label, and on your registration and insurance documents.
Is a recall still open on your vehicle? Only NHTSA’s official VIN check can say whether a campaign applies to your exact vehicle and whether the repair has already been done.
Your VIN is decoded with NHTSA’s public vPIC service to identify the make, model and year. It is not stored and is not added to any page address.
The official record
This page reproduces the campaign as filed with NHTSA. The NHTSA record is authoritative — if anything here differs, follow the agency.
Open campaign 26V-523 on NHTSA.gov