Originally Posted by e36brossard
Hey my 02 sensors need to be replaced but im wondering if it really matters cuz i dont really care about the check engine light and its like 400$ and i already have at least 3gs to put on the car so i as wondering if it affects the air/fuel mix? if it doesnt ill just leave it that way...thanks
I wouldn't leave it, a bad O2 sensor not only causes poor performance and waste gas, it damages other parts like the catalytic converters. I don't know the year or engine size of your car but check out these prices for a '95 E34 with different engine sizes, then decide if they are affordable, then look up the O2 sensor for your car.
Free shipping to montreal for orders over $75. I have no affiliation with this company just trying to help out.
Oh by the way... with the price of gas these days new O2 sensors will pay for them selves in no time flat.