:cries: thanks for ur help stevej... i am really appreciated ur useful replies. but since i already changed the wrong one, do u think i should just leave it there or take it off and return? it is $149 from autozone. :( i feel stupid now.. also, what is the different btw these Universial sensor and the OE sensors? because the universial is very cheap, like only half price of the OE sensors. :cries: