Water pump OEM BMW or Pierburg

My water pump lasted 420,000km

My water pump went out at 155k, 2006 BMW 325i auto

I’m at 180k, holding strong

My 330i started throwing codes around 135k. Replaced it for peace of mind and it turned out to be the original. I’ve heard somewhere that the water pump used in the 2006 325 and 330i is a bit different and lasts longer

Original water pump, lasted to 167k!

My experience with the N52 was great honestly. I owned a 2007 328i from 2007-2019 and put over 120,000 miles on it. The only engine issues it had were the water pump failing at 90,000, and the oil filter housing gasket leaking.

It happens. I’ve had maybe 3-4 do this out of probably 300 we’ve changed at the shop. Once was a pierburg but the rest were autozone duralast etc.

I replaced my water pump at about 205K miles. I had seen someone on e90post mentioning he saw fault codes before his pump failed. I decided I could wait if I kept a close eye. At about 205K miles was when I saw a fault code via ISTA/D. It mentioned something about "...water pump speed deviation..."

Yup that's how my Z3 once tried to kill me. Doing 90kph on the off ramp and the ol water pump decided to retire. In the process dousing my rear wheels in coolant.

I picked the pierburg for all aluminum casing and impeller. They were both about the same price last time I needed to get one. Note that the pierburg failed at not even 10k miles. I replaced with another pierburg chalking it up to bad luck. The only advantage I can think of with the pierburg is the fact that you can torque down the hoses that use clamps and not have to worry about cracking the housing. But in reality doubtful that is a risk. Also it won’t be in service long enough to get brittle enough to matter.