21: Volkswagen Passat
The Passat has long been an upmarket version of the Jetta. It’s slightly larger with luxurious appointments. But the Passat is also an expensive car to maintain because of many issues that can arise. The Passat has serious problems with the transmission failing early on (via Readers Digest).

The Passat also has many issues with sensors and engine components. All these issues can lead to an expensive repair bill. Likewise, the Passat also has a bad reputation for timing chain issues and oil leakage on the 2.0T models. If you don’t want an expensive repair bill, avoid the Passat at all costs.