If you have ever had to stop on the side of the highway because of all of the smoke pouring out of the grille of your vehicle, you are no stranger to the importance of having a healthy radiator. This is a very important component of your vehicle that keeps the engine cool by passing a coolant through your vehicle's engine block. Drivers should consider themselves lucky when they only have to replace one part, such as the radiator cap, hose, or fan. There are a few ways to tell whether or not the problem is with your radiator fan. The easiest way is just to do a visual check to see if the fan is coming on when the engine gets too hot. The temperature sensor failing to tell you that the engine is overheating is another sign that the fan is not working. Whether you need a whole new radiator or you just need one of the parts, such as a hose, cap, or fan, you should have no trouble finding one that fits your vehicle through the immense selection available on eBay, regardless of what you drive.