20. Mazda CX-7
While the Mazda CX-7 is attractively priced on the used market, it has been associated with several reliability issues that can lead to high maintenance costs. The turbocharged engines are known for oil leaks and turbocharger failures, often due to sludge buildup from infrequent oil changes. Timing chain problems can also cause catastrophic engine failures. Long-term reliability is weaker compared to other Mazda models. For more detailed information, refer to CarComplaints.