Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4515206.

I have a Ford Focus 2012 (Hatchback) and after 9 years of prolonged heat, the windshield wiper tank cap decided to disintegrate. I whipped this up it Fusion 360 and printed it in PETG.

This cap may fit newer ford(s) vehicles.

Update: I updated the model to be a little easier for some people, this is a push-fit with a screw-on lid.