Eugen A

Will do, thanks

The technician, I know him for a very long time and seems a capable technician, but, maybe you are correct and I will insist again very soon. Thanks again

Yes, you are correct on your presumption. The coolant level always been checked when engine cold, topped up to full and after few thousand miles drops down to between min an max and stays there. Lexus dealership told me that seems that on some trim specs, it's a normal characteristics. But, I have had many Lexus cars before and I never remembered none of our previous cars to have this kind of coolant behaviour. I still assume that somewhere is a very tiny and small drop but never needed to top up huge amount of coolant, only around 200 ml...

Many thanks for all your replies. I will keep you updated.

Yes,I agree , but I got a loaner no long time ago, RX450h takumi, 2022, 3000 miles odo only and when I checked by curiosity, tge coolant level was halfway through between min and max on cold engine.

The car has been checked twice by Lexus Tunbridge Wells and they haven't spotted anything wrong. The loss is very minimal, but is there. They have checked everything. The car has nearly 20.000 miles from new, bought last year. I suppose they have checked the coolant filler indeed, no leaks and nothing wrong with the car. They will recheck everything at the 20000 miles service. The car always stays between minimum and maximum on coolant level , but drops always to middle if topped up to full after 4000 miles to 5000 miles. But,the level of coolant never dropped further on expansion tank.

Hi everyone, one of our Lexus cars, 2022 RX450H F -sport Takumi pack have a minimal loss of coolant level on each 3000 to 5000 miles. If the expansion tank is filled on full, at 10.000 miles service , on cold engine, coolant level is around one inches below the max. Car has been checked twice by Lexus dealership, no leaks, no any other issues. I use the car to tow a caravan (Coachman VIP575 - 1700 kg ). The dealership checked everything and the car seems to be fine. I was wondering if someone else has the same issue? All my other Lexus cars which we own at the moment (Nx300h and UX300e) have not had this coolant dropping symptoms. Thank you