A radiator full of coolant isn't going to do you a lick of good if that coolant isn't moving. And it's the job of your Audi water pump to keep the water and antifreeze circulating around your engine, through the hoses, and into the radiator. That's why, in so many instances of overheating, there's an issue with the Audi water pump, causing it to not do its job. The Audi water pump can fail in a variety of different ways: Leakage around the Audi water pump seal can cause excessive coolant loss, and bearing failure in the Audi water pump can reduce coolant flow. In extreme cases, the Audi water pump impeller can shatter, causing coolant flow to stop altogether. Since it has a finite lifespan from the factory, the Audi water pump is considered a normal replacement item. That means that, when your Audi water pump experiences any of the failures above, a replacement water pump should be fitted as a unit. You can't go to the dealership and buy an Audi water pump bearing or Audi water pump impeller, in other words. In fact, you shouldn't go to the dealership for your Audi water pump at all, unless you want to overpay. Not when you can get the same OE-quality Audi water pump for your car right here at wholesale pricing. We make shopping for a new Audi water pump or Audi auxiliary water pump easy, too. Just select your year and model from our listings, and we'll show you if your Audi water pump is in stock. Then we'll ship your Audi water pump the same day you order it so you get your parts faster. So order from us and discover a better way of buying an Audi water pump, and all your Audi parts.