Scheduled Maintenance

welcome!

the problem is, you've done everything at the wrong intervals. there's no need to repeat anything already done, but all the fluids should have been done by 120k.

you have toyota's recommended maintenance schedule in your o/m.

have the spark plugs been changed?

i would do the tranny, but find a place that will do it for around a hundred bucks. it's not required by toyota, but many here feel it is a good idea.

 

First off, all of these "flushes" are in-fact drain-and-fills.

Can you clarify that? Engine coolant, inverter coolant, air conditioning system?

Looking at a pdf schedule I've found I believe both engine and inverter coolant circuits were supposed to have coolant "replaced" at 100K miles or 10 years. From your summation of what's been done, I believe inverter fluid has never been changed? The price is steep though, $120 would be more reasonable.

Way too much. It is very simple, on par with an oil change, albeit the drain and fill bolt washers are more expensive, and the fluid is about $9~10 per quart/liter. You should have 4 quarts on hand? Anyway, around $80~90 is reasonable charge.

It's not in the Toyota schedule btw. Ever. But well worth doing. About 100,000 miles sooner.

It's not unreasonable time interval, worth doing. The cost is a little high, but not by too much. This is something that should be done periodically: Honda for example, recommends tri-yearly, regardless of mileage. Toyota Canada recommends tri-yearly or 48K km's, whichever comes first.