10 Least Reliable Cars of 2026

Our surveys delve deeply into the numerous issues that can arise with a vehicle. We study 20 potential trouble areas, from nuisances—such as squeaky brakes and broken interior trim—to major concerns, including potentially expensive out-of-warranty issues with the engine, transmission, EV battery, and EV charging system.

We weigh the severity of each type of problem to create an overall reliability verdict score for each make, model, and year. To be considered for this list, we require at least two model years of data from the most recent three years in order to calculate the predicted reliability score. For this year’s survey, vehicles had to have data for at least two models, from a minimum of two of the 2023, 2024, 2025, or early 2026 model years. That reliability score is then combined with data collected from our track testing, owner satisfaction survey results, and safety data to calculate each tested vehicle’s Overall Score.

Based on that analysis, these models are the least reliable. They’re presented in rank order, counting down to the least reliable model. Each is shown with its specific reported problems.

For more details on each model’s reliability history, click through to its respective model pages.

See our complete guide to car reliability and our reliability FAQ for more information on how we survey and analyze reliability data.