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Ever snice i bought my Car (93 Mazda mx-6 v6 5spd) the rear 02 sensor is dead. SO my engine light is on. My o2 sensor in front onthe exhaust manifold is fine. What kinda of a difference will i see by replaceing my dead rear o2 senor? Better gas mileage? better performnace?
 

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hi,

you will see a difference in a mile or two of gas mileage. you will also feel the engine working up to par. it is a good investment anyways.

anthony
 

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also the cat. willnot get burnered up. also the combustion camber might be runnign rich, which mean you are burning to much gas( low gas mileage problem ) and the more gas you burn does not always mean more power.. the more gas you burn will turn the inside of you muffler tip black, so you can cheak that out. good luck

note to self i need to change min too.
 
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