What's the miles? Judging from failure reports, changing the water pump (I thermostat) every 100K miles is prudent. Likely best to do hybrid pump at same interval, but it is nuts to get to.
THANks, Mr Mendel -- first i changed the cheaper difficult-to-reach hybrid pump -- STALLED AGAIN along the highway so I drove slowly w/o a/c to dealer for diagnosis. Changed more expensive, easily accessible main water pump... 4000 miles ago ! ! PS: Toyota could have positioned that hybrid pump in a VERY EASY TO REACH spot behind the left headlight = lots of space there ! ! ! GRRR !! !
3013 Prius now has 214,000 miles. I am considering bolting 3/4" plywood sheet under the car to try to make for a quieter ride. [with large cut for heat from exhaust piping] We can hardly converse on rough blacktop. I already put two layers of 1/2" carpet padding in all the doors and floors, and I sprayed many cans of tar in all the wheel wells and underbody --- all to NO avail.
Yeah I was looking at the inverter coolant pump from below: it's right there, could readily be dropped out, except the fasteners can only undone from the far side. Which entails removing the entire blessed inverter. Very frustrating.
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