Data study
The worst used cars, ranked by federal complaint count.
Every year, some used-car buyer drives home in a car that the federal government already had a file on. We pulled the complete complaint record — all 25 of America's most-shopped vehicles for the 2017 model year — from the NHTSA Office of Defects Investigation database, and ranked them by how many owners went out of their way to file. The files are public and free. Almost nobody reads them before signing.
NHTSA Office of Defects Investigation complaint database, api.nhtsa.gov. 2017 model year, retrieved 2026-09-27.
How to read this
Complaint counts are not failure rates. NHTSA counts filings, not cars sold, so the best-selling models start with an advantage: more Escapes on the road means more Escape owners able to complain. A filing also takes real motivation — something broke badly enough, or scared someone enough, that they looked up a federal form. Treat the numbers as a floor, not a ceiling, and treat the percentages on small counts with suspicion: a model with 148 complaints and 5 fires reads as 3.4 percent, which makes it look fire-prone next to a model with 804 complaints and 32 — the raw count says the opposite about which file is worse.
What the table is good at is concentration. When 2,681 complaints land on one model year and 2,076 of them name the same component, that is not noise. That is a pattern.
What the numbers show
The Escape file is mostly one story.
2,681 complaints, and the top component — engine — accounts for 2,076 of them, with another 508 under engine and cooling. Owners describe coolant going where coolant should not go, and the pattern doesn't stop at this model year; it runs straight into the 2018 build. We documented that pattern in full here.
Fire reports cluster on a few nameplates.
By share of a model's complaints that describe a fire, the RAV4 (7.8%) and the Wrangler (6.8%) stand apart from every other vehicle in the table, and the Sorento carries the most fire filings in raw count (32). Engine-bay fires are the single scariest phrase in the federal database, and unlike a transmission complaint, a fire does not give you a warning light first. It is also the one item on any used car where a recall check is non-negotiable.
The CR-V's third component is the interesting one.
Engine and electrical lead for the CR-V, as expected — but the fuel system sits right behind them, and that is the gas-in-the-oil problem this generation is known for: fuel diluting the oil, oil level climbing past the dipstick mark, engine wear accelerating quietly. It reads as an oil problem on the dipstick and as a fuel problem in the federal file. A seller who says "it just uses a little oil" may be describing exactly this.
Toyota's quiet year is also data.
The Camry (148 complaints) and Corolla (189) sit at the bottom of a table of America's best-selling cars. Some of that is sales mix, but not all of it — the same federal form, the same model year, a fraction of the filings. Reputation in the used market is not always earned. Sometimes it is.
What to do with this before you buy
First, check the VIN for open recalls — free, thirty seconds, and recall repairs are done at a dealer for free. Second, read the complaint file for the exact model year you're shopping, not the nameplate average; a great model can hide one bad year. Third, get the pattern record for the specific build, which is what we do: the free check takes one VIN and under a minute, and the full report with failure patterns, mileage bands, recall campaigns and dealer price comparisons is $5.99.
We read the whole federal file for 25 nameplates — per-vehicle pages with the actual failure patterns live in the problem index, and the honest case for pairing this with a history report is in WrenchReport vs Carfax.