Sorry, I don't have a lot of direction to offer. Firmware for updating the Nav and vehicle is only available from and through authorized service departments. We're not talking about a PC here, for example where code can be downloaded and users can update things themselves. Most of this firmware is done via tools service depts have that connect to propietary systems users don't have direct access to.

You can check the website I suggested on specifics for your ES350, but more recent models like our Gen 3 RX require both the purchase of Map Updates from an authorized dealer (on a USB stick) which you may be able to do via the Net from a Lexus Parts Dept that will ship to you, but it must be installed by an authorized service department using a tool/PC/whatever they have that connects to some internal Toyota/Lexus system to authorize the key that comes with that USB stick. Impossible to do it yourself on certain models like our present RX. That's evolving again, but check the website for how your particular model works. I just caution you, that even if you can buy new maps and could install them yourself, that isn't going to help you at all if you don't first have the Nav supporting the regional maps your trying to install. Hence, back to square one. You need to find a dealer that will support what you're trying to do. I am not aware of a Nav website like we have with Canada/US, that describes mapping data available for other countries -- so can't help with that either I'm afraid.

Good luck.

 

When it comes to Gray market vehicles, you are best off browsing local/other gray market forums for hacks that people in your situation had to come up with. You are not likely to find knowledge here.

 

Yeah, I got a 2011 450h. It was owned in Canada. Everything is changed to Fahrenheit except the climate control which is in Celsius and there's no option to change it.

 

Has anyone successfully changed from Celsius to Fahrenheit on the 2013-2015 RX350 climate control temperature buttons. I believe this can not be done without changing a component, not sure which one controls this….A/C control head unit, A/C amplifier/ECU, sensors?

any help would be appreciated