The primary risk associated with driving a Volkswagen car with a radiator problem is the potential for the engine to overheat. If the radiator is not allowed to effectively dissipate the heat generated from the engine, the engine temperature will continue to increase. This can cause permanent damage to the engine components, such as the pistons, cylinders, valves, or other internal components. It can also cause complete engine failure, resulting in the car having to be taken to the shop for repairs or a replacement engine. Additionally, if the radiator is failing, it may cause the coolant to leak, leading to the car having to be taken to the shop for repairs or a replacement radiator. Driving a car with a radiator problem can also lead to decreased fuel efficiency since the engine will not be operating optimally, and increased emissions since the engine is running hotter than normal. Therefore, it is essential to have your radiator checked routinely and to address any problems immediately to avoid any damage or further issues.