Recreational Vehicle Lpg Tank Valve/gauge problems of the 2003 Toyota Prius

There is no thermostat guauge in a 2003 Toyota Prius , the car over heats and you don't know until your in the middle of traffic nearly getting killed. Toyota was contacted, but say not a recall and they don't honestly car cause car is old . That's not right , anything you still use from cars or even medicine have later come back to hurt or killed people. There is no hot to cold gauge in the car , 2003 only . I have investigated and see people publish about this but let it slip by . I was driving with no installed guauge and survived through make a left hand turn on a stalled vehicle that over heated and was later check by Toyota technicians that said f there was a thermostat gauge problem would of most likely be avoided. Somebody can't keep open and closing the radiator cap cause of this missing gauge . Oil has dipstick you check !!! safely too. Not going fry my face or burn my hands on keep checking the radiator. Plus with a proper guage you might know if your car is cooled down or safer to check. Toyota had refused to address or claim any issues. Case# 1707283203. People lives on at stake cause they wanted to a. Save money b. Don't know how forget to install the part for the year on every 2003 Prius !! please help , Toyota does not car about my safety or anybody else safety - jon tiskowitz.