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How to use owner-complaint data when you are buying a used car: what a history report misses, how to read the numbers, and what to ask the seller.

CVT transmissions and which years to avoid

Continuously variable transmissions are in most small cars sold since 2012. Some years are fine and some are not. Here is what the owner-complaint data says, model by model.

September 14, 2026

How to read NHTSA complaints before buying a used car

Owner complaints are public, free and the best early warning there is for engine and transmission trouble. Here is how to read them without being misled by the raw count.

September 14, 2026

Questions to ask a seller about the transmission

The questions that get a straight answer about a used car's transmission, what the answers mean, and a test-drive script for the problems owners actually report.

September 14, 2026

How a dealer can screen an auction run list in ten minutes

A sale sheet is 200 cars. Most dealers walk the lane blind on the drivetrain. Here is a ten-minute routine that ranks the whole list by owner-complaint pattern the night before.

September 14, 2026

What a Carfax report does not tell you about the engine and transmission

A vehicle history report is about one car's paperwork. Whether that model year has a transmission problem is a different question, and the report never asks it.

September 14, 2026

Used car model years with the worst engine and transmission complaint rates

The model years where owner complaints to NHTSA concentrate most heavily on the engine and transmission, ranked by share, from the cars we track. Refreshed with the data.

September 14, 2026

Check the actual car, free.Paste the VIN. One report is free, no card, and it shows the complaint pattern for that year, make and model.

Check a VIN