3. Mazda RX-7 (Third Generation)
The third-generation Mazda RX-7, produced from 1992 to 2002, featured a sequential twin-turbocharged 13B-REW rotary engine, delivering impressive performance. However, this advanced engine design led to several reliability issues, including apex seal wear, overheating, and oil consumption. Regular maintenance, such as frequent oil changes and cooling system checks, was essential to mitigate these problems. Despite these challenges, the RX-7 remains a beloved sports car among enthusiasts. (roadandtrack.com)