Hi Tony, I understand your concern and frustration at having spent a lot of money and having to experience little niggles with it.
It's really difficult to say what it could be, unless someone here has actually experienced the same condition.
I tend to think it could be transmission related and not in a mechanical sense because everything is run by computers these days and when the software has a brain fart it can translate into a mechanical one.
I would definitely bring it to the attention of the dealership and perhaps take it back under a warranty claim. It's possible it may need a software update or something insignificant as that.
The old chestnut that seems to be the flavour of the day, is that people are saying that "I took it to Toyota and they could find nothing wrong". Don't accept it. If it's not driving as it should then they are responsible to offer a solution and fix it under the terms of the warranty agreement and consumer law.
Hopefully, it turns out to be nothing major. It's brand new, so I cannot imagine anything serious. Minor hiccups can occur with the high complicated electrical systems these modern cars have.
I'd hate to be a car technician these days to be honest. Issues like this can take you down a rabbit hole if you're not careful.
Let us know how you go.
My car does the same thing and it never bothers me to be honest. If there are no obvious leaks anywhere, usually checking when the engine is hot, then it's more likely it's just evaporation through the hoses.
It's not uncommon to have to top up the reservoir on the odd occasion. Water evaporates over time so the coolant level will never be constant.
Although they can look prettier, they don't perform as good as EPDM rubber. Sure they can handle higher temperatures, but when does your average car operate in that temperature range to warrant these anyway ??
High performance cars are usually fitted with silicon water hoses due to the higher temperatures produced. That's it. The major downside to silicon hoses is that they are much more porous than EPDM rubber. Why do you think they don't use silicon for fuel and oil ? You will lose more coolant over time a compared to stock rubber hoses. It's just dumb.
If the factory intended our cars to have silicon hoses, then they would've put them there.
At the end of the day, just stick to the original manufacturer recommended products and you can never go wrong.
Why would you want to introduce reliability issues in a reliable vehicle ?
Hi, back in February this year I spent $80k on a brand new Toyota Prado GXL from Sunsine Toyota in the Sunshine Coast. This is the first time I've owned a Toyota and whilst I'm generally happy with the vehicle I am beginning to get concerned with a subtle stutter that happens at random times when driving the vehicle. I haven't been able to figure out if it is an engine-related stutter or a transmission stutter, but it appears to happen when the the engine is revving at about 1500rpm and under a bit of load (so for example when starting to climb up a slightly inclined road). It isn't something that can be heard (so it doesn't appear to be engine misfire) but you can feel the stutter, which makes me think it could be a transmission issue.
I haven't discussed this with the Toyota dealer yet because, since this happens randomly, I'm thinking it will be hard to convince their technicians that there may be an issue with the car if I take them out for a test drive and the stutter doesn't happen. So I thought I'd post my experience on this forum to see if anyone else has experienced something similar, and if they have, what the outcome has been? Keen to hear from you.
Yep except I test drive my car's after I do the work to prove its ok before I button everything & close her up. Not being satisfied with one test drive, I did another the following day & I almost instantly smelt the fumes. I filled the tank up the previous night & after deliberately trying to slosh the fuel about violently via quick left right steering manoeuvres & sudden braking she leaked & leaked well. Easy fix 👍