Water pump AISIN or Hepu

Get the Aisin one off rockauto, I just replaced mine with it.

You can save yourself some time and money by buying the Aisin water pump / timing belt kit on RockAuto. Don’t mess around with other ones. The parts are all the same OEM you’d get from Subaru at a fraction of the cost, except for the pump itself — but that’s a good thing because while Aisin didn’t make the pump for these, they were an OE pump maker for Subaru and the company that made the OE one for that generation (Gates) has apparently started producing crap. I don’t think Subaru even uses them anymore for their OEM pump.

You should use Aisin or OEM water pumps.

When I do side jobs I use an aisin branded water pump and timing belt tensioner. The aisin kit is top notch.

It has a hepu water pump

The inverter water pump is a fairly common failure on the second gen Prius. The pump runs anytime the car is on, and it just wears out.

GMB or Hepu pumps are generally good for 100k or more.\n\nThat leak is due to the donut like seal between the pump and the head.

I bought one a couple weeks ago. It went right in and works perfectly so far. It's a really easy install too.

I’ve now popped two water pumps. Each of them have sprung a leak from the freeze plug. I seat the pump and o-ring by hand then torque bolts to spec.. each time they’ve been good for about a month or so, then start leaking from the freeze plug.. both pumps have been made by HEPU.

I had a defective hepu pump that leaked also. Only had about 20k miles on it