The primary risk of driving a Volkswagen car with a Car Vibrate problem is instability when driving. This can manifest in a variety of ways, such as a shaking or vibration of the car, increased stopping distance, and less precise steering. Additionally, the vibration may worsen over time, leading to further issues. The vibration may also cause components within the car to become loose, leading to further damage or failure of these components. Finally, the vibration could be caused by an underlying issue, such as an imbalance in the wheels or a faulty suspension, and if left unchecked could result in further, more costly repairs.