repaired · 2026 Q2
Other: labels
Risk. Emergency exit labels that are difficult to read can prevent or delay the use of the emergency exit, increasing the risk of injury.
2021 Thomas Built Buses Saf-t-liner HDXProblems, recalls & complaints
NHTSA has logged 0 owner complaints about the 2021 Thomas Built Buses Saf-t-liner HDX. It is covered by 16 safety recalls, and for recall 22V-510 the manufacturer reports only 38% of affected cars repaired.
Source: NHTSA complaints, recalls, investigations and manufacturer recall reports, through July 24, 2024. Updated daily.
Complaints by system
Where the 2021 Thomas Built Buses Saf-t-liner HDX has problems
0 complaints grouped by the system owners reported.
| System | Complaints | Crash, fire or injury |
|---|
Source: NHTSA Office of Defects Investigation. Complaints are submitted by the public and are not verified by NHTSA.
16 recalls
2021 Thomas Built Buses Saf-t-liner HDX recalls and how many were fixed
Each ring shows the share of affected cars repaired, from the manufacturer’s latest quarterly report to NHTSA. Recall repairs are free at authorized dealers.
repaired · 2025 Q1
Body: roof and pillars
Risk. A school bus exterior roof panel with insufficient joint strength may separate during a crash, increasing the risk of injury.
repaired · 2024 Q3
Structure: body
Risk. A school bus panel with insufficient joint strength may separate during a crash, increasing the risk of injury.
repaired · 2025 Q2
Seats: barriers
Risk. Occupants may collide with the front seat barriers with more force than intended during a crash, increasing the risk of injury.
Show 12 more recalls
repaired · 2025 Q3
Seats
Risk. Cracked passenger seat frames may not adequately secure passengers in the event of a crash, increasing the risk of injury.
repaired · 2024 Q4
12v/24v/48v battery: cables
Risk. An electrical short circuit can increase the risk of a fire.
repaired · 2024 Q4
12v/24v/48v battery: cables
Risk. An electrical short circuit can increase the risk of a fire.
repaired · 2022 Q4
Other: labels
Risk. The operator may overload the vehicle while referencing the incorrect label, increasing the risk of a crash.
repaired · 2023 Q3
Electrical system: alternator/generator/regulator
Risk. A loose power cable connection may cause electrical arcing, which can increase the risk of a fire.
repaired · 2023 Q3
Hydraulic power assist: hose, piping, and connections
Risk. A damaged power steering hose can leak, and increase the risk of a fire.
repaired · 2023 Q3
Hydraulic power assist: hose, piping, and connections
Risk. A worn power steering hose increases the risk of a fire.
repaired · 2021 Q3
Seats
Risk. In the event of a crash, the seats may not adequately protect the occupants, increasing the risk of injury.
repaired · 2023 Q3
Linkages: tie rod assembly
Risk. Detached or broken tie rod ends can result in steering loss, increasing the risk of a crash.
repaired · 2023 Q3
Fuel injection system: fuel rail
Risk. A fuel leak in the presence of an ignition source increases the risk of a fire.
repaired · 2023 Q1
Steering: critical fasteners
Risk. A fractured bolt may cause a loss of steering, increasing the risk of a crash.
repaired · 2022 Q4
Disc: caliper
Risk. The loose bolt could result in the other caliper bolts to loosen.
Recalls apply to specific cars. To see whether a recall is still open on yours, enter the 17-character VIN at nhtsa.gov/recalls or with Thomas Built Buses.
Best & worst years
2021 vs. every other Saf-t-liner HDX year
Bars show complaints per model year. Colors show the CarFlaw verdict: complaints weighted for crashes, fires and injuries, adjusted for years on the road and compared with the Saf-t-liner HDX median. How we score
'02'03'04'05'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25'26
- Avoid
- Caution
- Solid
- Best
- Not rated
Own a 2021 Saf-t-liner HDX?
Decode your VIN to see the recalls for your exact car, then confirm open recalls with NHTSA.