It is impossible for any automaker to manufacture all the parts that go into their vehicles. It is much more common for a number of manufacturers who specialize in a certain automotive part of system to build components used by that automaker. These companies are known as OE Suppliers, and they are the ones who originally manufactured and supplied the part to be assembled along with the rest of the vehicle. Reproduction parts are good, but original equipment parts are the best at bringing your vehicle back to perfect form and functionality. The most famous and ubiquitous OE suppliers include companies like Bosch, Gates, and TRW.
Make sure your cooling fan assembly is running at 100%, and replace it if it isn't.
OEM: 17 11 7 590 699, Item: 552122