This doesn't seem to be an issue on F3X vehicles with a metal housing water pump (p/n 11518635090)
https://www.ecstuning.com/b-genuine-...p/11518635090/
A lot of the pre-mature failures (no water pump lasts forever) seem to be from a cracked housing due to the plastic housing used on the 11517632426 pump that originally came on the N54 and is also used on E9X N55 motors as well as F25 and F26 N55's.
https://www.ecstuning.com/b-genuine-...1517632426kt2/
As far as I can tell though, BMW has not updated the F25 and F26 N55 to use the newer pump, which is a bit baffling.