Been quite a few years since I've participated on these forums, but still got the old Gen2 and it's still going strong at about 460000 km. A few days ago while I was checking the oil I noticed that the inverter coolant pump wasn't running. I usually check for that, and coolant levels etc any time I'm checking the oil. So not sure how long it's been non functional, though probably not more than about 3 or 4 weeks as it was working fine last time I checked the oil. No blown fuses or error codes or anything, so I guess I'm lucky that it's only been driven pretty easily in that time and nothing overheated. Rang around my local Toyota dealers for a replacement part and apparently none in the country. They told me 4 to 8 weeks from Japan, ouch. Anyway, didn't want to be off the road for that long so I took a punt on a cheap non genuine part from ebay. Shipped overnight and I put it in this afternoon and is working perfectly. For how long though? That I'm not sure of, but at least I'm back on the road. Will be keeping a close eye on it, but for now it looks really good and is pumping strongly. Maybe I'll get nervous and end up replacing it with a genuine part some time in the future, not sure at this point, but all good for now. Will update this post if anything untoward happens.
In cool weather, you cannot observe the absence of the inverter part of the pump. Especially during short trips. The coolant will not have time to heat up and nothing critical for the Gen2 inverter will happen. The contract spare part may not be used for long. It is better to wait for a new pump and replace it.
They're are about 50 12 volt hot rated water pumps w 5/8 barbs in almost exact clocked positions . I'm using one from a gy6 water cooled scooter like a Vespa. Been in place about 4 yrs dead silent too.if not above 65 us degrees you'll probably never know it's not working.
