Vehicle recall 21V327000 · May 7, 2021
2018-2021 Thomas Built Buses SAF-T-Liner HDX
The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Daimler Trucks North America, LLC (DNTA) is recalling certain 2018-2021 Thomas Built Buses Saf-T-Liner HDX School Buses. The sealing washer may not seat correctly in the pilot bore holes, allowing the high pressure fuel rail assembly to leak.
- Consequence
- A fuel leak in the presence of an ignition source increases the risk of a fire.
- Remedy
- Dealers will replace the fuel rail and fuel lines, free of charge. Interim owner notification letters were mailed on June 21, 2021. Owners may contact DTNA customer service at 1-800-547-0712. DTNA's number for this recall is FL-886.
- Notes
- Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Recall details
- NHTSA campaign
- 21V327000
- Reported to NHTSA
- May 7, 2021
- Filed by
- Daimler Trucks North America, LLC
- Manufacturer campaign
- FL-886
- Owner notification
- October 29, 2021
- Vehicles potentially affected
- 1,262
- Initiated by
- the manufacturer
- Components
- Fuel system, diesel › Fuel injection system › Fuel rail
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Thomas Built Buses SAF-T-Liner HDX (2018-2021): 2021, 2020, 2019, 2018
Has your Thomas Built Buses been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Thomas Built Buses dealer can also check your VIN. Recall repairs are free.