I think it's finally time to replace my o2 sensor. My car has been getting terrible gas mileage and will sometimes hesitate. After reading on this forum for a few hours I have decided that it's more than likely the oxygen sensor, so that's where I'll start. I have two questions.

First, which brand of o2 sensor should I get and why? I have heard that some can cause undesired results and use more gas than other brands.

Second, what steps should I take to remove my stock o2 sensor, which has most likely been on there for most of its life? Will I need any special tools.

Thanks for your help. I'm just ready to have this car running good for the nice months ahead.

 

TTT

Any info?

 

The sensor may be difficult to remove with the engine cold warm it up a bit but not to hot.. just to about 120 or so.
Disconnect the electrical connector from the oxygen sensor.
note the position of the silcione boot and carefully back out the sensor from the exhaust manifold. Be care not to damage the threads dont use excessive force.
MAke sure to put an anti seize compound on the threads if the new one doesnt have it and reinstall , becarefull not to cross thread..
and torque it to 30ft lbs. then connect the electrical connector back on.
Be careful when handling the sensor it can be damaged easily do not drop of handle it roughly.
also make sure the boot goes back on correctly or you will melt it.
as far as what kind i dont think i matters.
i would get a new one rather then a serviced one.

 

I think I read somewhere that the bosch oxygen sensors tend to make the car run rich and use more fuel. Is that true? I dunno if the AC Delco would be the one to use or not.