Been wanting to add outside /inside air temp. gauge for a while,also a compass.
The search for these items is not finding what I had in mind!
Would like to get & modify to where I want to install ,a overhead unit from what ever,but seems no one knows where the senors are if you can find a unit!
Found a outside only that will go where I want( where the clock is), & the same company has a round inside /outside unit that I think I can make work. The compass will have to be a in another area. Found a Bell product & made a holder to go @ the headliner,but the unit failed. Another Bell unit that goes over the mirror & the sender attaches to the windshield,may be what I use!
Photo's when I get that far!

 

Well my sister wrecked her car a week ago, and the adjuster was out there writing it up, and I asked what a loose sensor was. She told me it was the temp sensor. So as far as i know (at least on toyota yaris) the outside temp sensor is under the front bumper on the driver side.