Engine coolant inside catalytic converter

The coolant hoses are connected to the Heat exhaust recirculation system, not the cat.

 

No - there were 2 separate diagrams - this is the relevant one:

 

In many parts of the world we don't have extreme cold - I'm not aware of how extensively it's in USA cars - could be all? This article (TOYOTA early Gen4 publicity) seems to indicate that - if you've got active grille shutters, you've got the other:



Here's the whole article:
Toyota Unveils Advanced Technologies in All-New Prius | Toyota USA Newsroom

 

Got it now, so there's one in front of the first joint right next to the manifold.

 

Seems so - not sure why 2, though. I've only seen 2 before on a car with dual exhausts.

 

Good grief, I didn't say CONNECTED,I said CLOSE PROXIMITY. I'm sure Toyota designed the thing very carefully,but still,that's a lot of radiating heat very close to the hoses.

 

I see what you mean now, rubber hoses near a hot exhaust

 

You could always wrap the exhaust with fiberglass.

Pixel XL ?

 

I would imagine almost all parts between the different Prii are interchangeable. Glad it wasn't expensive for you though.

 

Or they redesigned it and would replace it with newer part if it fails. That happens also.

 

It often happens - more noticeable as vehicles age. Updates, like the 2019 won't just have new headlights and taillights - AND FINALLY, we're getting knobs on our radios here - but many seemingly unchanged parts will have been re-designed slightly, some parts strengthened etc.

That's why, when you go to get parts, they ask you for the year - and very likely the VIN. And, sometimes bits you get from a wrecked car may not fit.

 

You'll be lucky to work it out - unless you go to the parts branch of your dealer and they've got the 2 to look at side-by-side. I'd be surprised if they have either in stock though, let alone both. They could look identical - seen that before.

 

I glanced at the 2 diagrams - I couldn't really see any differences apart from a number? But I didn't labour over it. Did you spot any actual change - or is it just a few design changes?

 

Yes, I thought the same. There could be changes non-visible in a diagram, like the hardness of a seal, elasticity of a joint, thickness of a ... whatever. And - TOYOTA wouldn't tell us because it wouldn't be widely known there - just that an engineer signed off on a new part.