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Help rear o2 sensor won't come off

844 views 1 reply 2 participants last post by  subi_stout 
#1 ·
I'm trying to replace my rear o2 sensor and it will absolutely not come loose. I tried wd40, tried warming up the car for a few minutes, and i have a o2 socket as well. Anyone have any tips to how to loosen this o2 sensor? Please help. thanks.
 
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