Do the coolant caps come with everything or must the OEM internals be transferred to the new caps?

Created by Stephen Bennett, Modified on Mon, 28 Jul, 2025 at 1:58 PM by Stephen Bennett

Our coolant caps do not include the pressure relief valves, and must be used with your existing internals.

Additionally, on the B58 there were two different coolant caps please see the fitment note below.

Fitment Note

If your primary expansion tank cap looks like this:

You will need to purchase a different coolant expansion tank cap to use as the donor cap.

BMW Part number 17117639021