Coolant Service Question

The fluid is the same for engine and inverter.
IMO they should change both when they did that "hybrid coolant fluid service".

 

The fluid is the same, but there are 2 different systems. Shortly after I bought our Gen 2, I asked the dealer to change the coolant in both. They charged me $150 for each. $150 is probably too much to pay for the inverter coolant drain and refill, but about right to pay for the ICE drain and refill, because I'm told getting all the air out of the ICE system is much more involved. They had my car for a couple of hours and I saw them working on it for most of that time.

 

Not even close to the same service. As Dave so correctly pointed out. And the engine coolant is more involved due to the extra work in getting out the air bubbles. Both need bleeding but the engine coolant needs burping, too.

 

@NutzAboutBolts has YouTube videos for both engine and inverter coolant changes, give a good idea of what's involved.

Toyota USA maintenance schedule says:

Engine coolant change at 100k miles or 10 years (whichever comes first).

Inverter coolant change at 150k miles or 15 years.

Both thereafter at 50k miles or 5 years.

 

Schedule? Who has time to follow that? We just come here and be told when to do things