If you are driving a Volkswagen car with a Wossner Piston problem, there are several risks. This issue can cause a decrease in engine performance, higher fuel consumption, and increased levels of exhaust emissions. It can also cause excessive engine noise and vibration, as well as oil leaks. In the worst case scenario, the piston could become completely seized due to the excessive wear and tear, which would render the car undrivable. As a result, it is important to have this issue addressed as soon as possible in order to avoid any potential risks.