Thomas: what breaks, model by model
Owners have filed 75 defect reports about Thomas vehicles with NHTSA, spread across the 15 models below. This page ranks those models by how much owners have had to say about them and by how far each one swings between its best and worst model year. Open a model to see every year of it side by side, or a single year for the failure-by-failure breakdown with the mileage each problem was reported at.
There is no overall Thomas score here, and there will not be one. A manufacturer is not a thing you can buy; a model year of a model is. None of the models listed below carry enough owner reports to score, which on a small range usually means low sales volume rather than a clean record.
Every Thomas model
| Model | Years | Owner reports | Best year score | Worst year score |
|---|---|---|---|---|
| School Bus | 1996–2011 | 27 | not rated | not rated |
| Mvp EF | 1996–2008 | 10 | not rated | not rated |
| Bus | 1998–2002 | 7 | not rated | not rated |
| Saf-T-Liner | 1996–2002 | 6 | not rated | not rated |
| Thomas | 1996–1999 | 6 | not rated | not rated |
| C2 | 2004–2008 | 3 | not rated | not rated |
| ER Model | 1996–2001 | 3 | not rated | not rated |
| FS-65 | 2004–2005 | 3 | not rated | not rated |
| Cl100 | 2000–2001 | 2 | not rated | not rated |
| Conventional | 1996–2004 | 2 | not rated | not rated |
| Saf-T-Liner ER | 2002–2005 | 2 | not rated | not rated |
| ER | 2001–2008 | 1 | not rated | not rated |
| Mvp ER | 1996–2008 | 1 | not rated | not rated |
| Saf-T-Liner HD | 2000–2001 | 1 | not rated | not rated |
| Transit Bus | 2007 | 1 | not rated | not rated |
How to read this page
The report count is the number of complaints owners chose to file with the US National Highway Traffic Safety Administration about that model. It is not a failure rate. A model that sold three million copies will out-report a model that sold sixty thousand even if the second one is worse, which is why every ranking deeper in the site divides by an estimate of how many vehicles are out there before it puts anything in order. Treat the count on this page as a measure of how much evidence exists, not of how bad the car is.
The two score columns come from the model years underneath. Each one is a 0–100 risk score built from how often reports arrive relative to fleet size, how serious those reports are, and how early in a car's life they land — and each is ranked against other vehicles of the same model year, never against other years. That last detail is what makes the columns comparable: a 2003 car is not penalised for having had two decades to accumulate complaints.
Models showing “not rated” have too few reports for a score. On a low-volume model that is a sample-size problem rather than a verdict, and the model page still lists every reported failure and the mileage it was reported at. How the score is built.
Questions this page answers
Which Thomas model has the most owner complaints?
The Thomas School Bus carries the most, with 27 reports filed with NHTSA across model years 1996–2011. Raw counts follow sales volume as much as reliability, so the per-model-year pages divide by an estimate of how many were built before ranking anything.
Are Thomas vehicles reliable?
Nothing on this site rates a manufacturer as a whole, because owners do not buy manufacturers, they buy one model year of one model, and the spread inside a single badge is usually wider than the gap between badges. Of the 15 models listed here, none carry enough owner reports to score at all.
Not affiliated with Thomas. Every figure on this page is computed from public NHTSA complaint and recall records. Complaints are unverified accounts filed by owners, they are voluntary, and no manufacturer reviews anything published here. Corrections are read and acted on.
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed