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How hard is it to change out your own O2 sensors? What should a shop charge to do that for you? Just wondering because i have to get new ones one way or another.
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do it yourself... it's simple. Only trouble you might have is the sensors being too tight... you can use a 02 sensor removal tool which can help greatly. You can also use vise grips too. Heat helps too. Mine wouldn't budge with any pb blaster and such so i used my torch and got that nice and hot... came right loose. once you are under there bud you will see exactly how simple it is.
 

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Its really easy to do, If I remember right it takes a 7/8ths wrench.
 
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