[e90pilot]

I'm on my third pump. Had mine replaced under warranty with only 5000mi and just had it replaced again at 178,000 mi. I have a hookup at a dealership and it cost me about $600. I do track my car and I believe the second one failed because of multiple dry runs. There is air getting in the cooling lines but only on the track or VERY high loads (full throttle-high rpm for extended stints). The latest pump revision is good and shouldn't fail. Running air through it is about the worst thing you can do to it.