Your radiator allows your coolant to dissipate the heat it absorbs from the engine, and that coolant has to move in and out of your radiator somehow. The part that accomplishes this fluid transfer is your BMW 735i water pump. Your 735i water pump keeps the coolant and water mixture flowing through your engine, into and out of the various tanks and chambers as well as your radiator.

Without a working BMW 735i water pump, your coolant would just sit in your engine, growing hotter as you drove until your engine overheats. Of course, the consequences of an overheating engine can easily prove much more damaging and expensive than simply replacing your faulty 735i water pump.

Your BMW 735i water pump is equipped with a seal that helps to keep your car's cooling system leak-proof. When your 735i water pump seal is starting to go, you may see a stream of coolant pouring from the weep hole in your BMW 735i water pump. Any time coolant dumps from the underside of your car is bad news, and often this puddle of greenish fluid indicates a need to replace your 735i water pump. If you find you are adding coolant to your overflow tank more often than usual, this may indicate a slow leak or other problem with your BMW 735i water pump. It is important that you replace a faulty 735i water pump right away, as without it your engine can quickly incur more damage. Relying on your radiator alone to cool your engine is useless if your BMW 735i water pump cannot move the coolant out to the rest of your engine.When you need a new 735i water pump, you will find high quality replacement parts at discount prices in our vast online catalogue.