Water Pump to Lower Radiator Hose Fitting - B46D / B48D - BMW G20, G22, G30, G01, G02, G29, Supra

This coolant fittings mounts to the water pump and attaches to the lower radiator hose. The stock plastic fitting has a very small lip and can be a frequent leak on the B48 engine. BMW updated the design with a deeper flange but now you have to either replace the whole water pump housing or take it apart and measure which fitting you have before you can order it.

We made this aluminum version to make it never leak again and also be universal across the two sizes. We also added a second o-ring at the base to make absolutely sure it doesn't leak!

Replace factory part numbers :

• 11515A88E70 (7.5mm version)
• 11518482253 (6.4mm version)

The length measurement refers to the distance from the base of the mounting flange to the lip that goes into the water pump housing. Our fitting is 6.4mm and can work with either housing. 

Comes with two o-rings as shown and is easy to install.