Water pump AISIN or Pierburg

We used an Aisin water pump. We have had no problems with this water pump as of 11k miles on the engine rebuild now.

I had my timing belt done by not a Volvo specialist specifically, but a “European brand” mechanic. They used an Aisin pump / Gates belt kit and life is good.

There’s a really good kit that come with gates timing belt, tensioner, idler, Aisin water pump, Toyota cam and crank seals and a serpentine belt for $350 I used it and everything has worked perfectly

You should be fine with the Aisin. They were the OE manufacturer for a lot of makes.

Pierburg. It’s literally exactly the same just no BMW logo.

Pierburg is the OEM maker of the BMW water pump. Spending the extra for the BMW is ridiculous when they are 100% the same exact same pump from the same company from the same factory.

I'm working on adapting these water pumps to a variety of older engines. This one will be going on a Chevy LSx. The pumps support two different control schemes; one via PWM (no feedback) and one via LIN. I will be working on reversing the LIN communications and building a more sophisticated controller soon.

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.

My 1 year, \~6K miles Aisin WPT-108 pump failure story:

I have a 4A-FE Corolla E11. Changed timing belt, auxiliary belts, tensioner+spring, the whole lot last summer. The waterpump (Aisin WPT-108) was from a reputable online shop here in Europe (Autodoc). Last week I come to find the new pump dripping from the lower weep hole, so its the whole timing belt job all over again pretty much. No wierd bearing sounds. I did 6K miles last year if that.

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.