doesn't the dealer have an oe sensor? if you still have the original one take it with u so you can match it if they have it. i'm not sure but have u tried a ka (91-94)sensor? they may fit and i know they are one wire like the sr's. but if u are looking to just go ahead and put an aftermarket one on that's cool cause u will get accurate readings all the time. i still reference my factory gauge(just under halfway mark)just look at it every so often just for insurance but i have the power fc now so i get accurate readings all the time. just putting my 2 cents in to help you out, always willing to help out a fellow 240 owner. later man!