I was just thinking today i notice that my gas lid was not locking i assumed the worst and would need to get a new air ram, when out removed it cleaned it up greased it reinstalled it and that fixed it works beautifully, i have never done a windsheild wiper on a car like this but you might want to try cleaning and greasing it up that might fix it, i dont doubt that if i would have took my car in they would have told me that i need a new air ram for the gas lid cover, but they would have done the same thing as i did i allways ask for parts and take down serial numbers, you might think i am parinoid but i dont have unlimited $$$$ and i was allways told you dont get money buy blowing it on useless things.