Water pump AISIN or OEM BMW

The water pump is probably the one part on any car I wouldn't cheap out on. Just get an Aisin as the other commenter said.

Aisin. The bearings in the idlers are better, the tensioner is better, and the water pump wont fail on you in 20k miles.

I just replaced the water pump on my 2011 today. Took me about 1.5 hours and was 150$ from Amazon. Aisin pump.

Replace water pump. 100% oem or aisin.

Use a good pump like a Aisin, cause you don’t want to do it again in a year.

When I bought Aisin water pumps for some of my other Toyota/Lexus vehicles, the embossed Toyota emblem on the pump would be ground off.

Get the Aisin one off rockauto, I just replaced mine with it.

It’s still baffles me how BMW can’t get a quality water pump on its vehicles.

Bought an Aisin waterpump off ebay and installed during the swap but it is making an awful racket and has me concerned it is a fake or otherwise defective out the box. Not sure how to share a video here but it sounds like a loud buzzing and i dont remember the old waterpump making that noise.

This has happened to my husband. He drives 2021 m340i with 17k miles. Water pump exploded last night.