Yaris 2004: Coolant hose leak

[YarisPie]

Hello. I have a coolant hose with what seems to be a leak. I've been searching online, but I can't seem to figure out the right search term to find one. And when I do think that I've found one, after entering my car's details, I get told that it doesn't fit my car.

The hose in question is the top one on the radiator, next to the filling cap (see borrowed images below).

Does anyone know what the hose is called, have a serial number for it, or know where I can buy one online?

My car is a French-built Yaris hatchback aut 1.3 2004 (LHD). Many thanks!

[TonyHSD]

Hi, 

you can use this website to find your car and locate any part and number then use this to search autodoc or Google but your best bet will be local dealer. 
https://japancars.ru/index.php?route=catalog/toyota

Make sure that you really need a new hose before you buy it. Where is exactly the leak a show much is? If it’s close to the radiator cap it could be from the cap instead as these has over pressure valve to let coolant out in ans event of pressure going too high