Oxygen Sensor

Tiny
PIANOPLAYA16
  • MEMBER
  • OLDSMOBILE
I have a 1991 Oldsmobile 98 Regency Elite. Can you please tell me where the oxygen sensor is located and the steps required to replace it. Thank you.
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Wednesday, February 7th, 2007 AT 3:19 PM

5 Replies

Tiny
GARFIELD
  • MEMBER
Normally the o2 sensor is located at the end of the exhaust manifold or in the exhaust piping just after the exhaust manifold.
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Thursday, February 8th, 2007 AT 8:08 AM
Tiny
PIANOPLAYA16
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Well I heard from an acquaintance that my model has 2 Oxygen sensors. The problem is that one (or both) of them is failing but I can't afford to have the mechanic replace it. The part is fairly inexpensive but the labor is what kills me. It sounds like an easy fix but I don't know much about it. I'm only 17 and this my first car which I'm having trouble maintaining it due to lack of funds. If someone could please walk me through replacing this part I would greatly appreciate it.
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Thursday, February 8th, 2007 AT 5:08 PM
Tiny
GARFIELD
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You are right assuming that your car is a V6, there will be one in each exhaust manifold or in the piping right after the exhaust manifold.
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Thursday, February 8th, 2007 AT 7:46 PM
Tiny
PIANOPLAYA16
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But How do I go about replacing it? I don't meant o sound aggressive but do I have to remove other parts, do I have to disconnect the battery? Do I need a specific tool? Things like this are what I need to know.
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Friday, February 9th, 2007 AT 5:54 AM
Tiny
ELPRUP
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You can buy a special removal tool, but for the same price or a little more, you can get a whole set of crowfoot wrenchs. Of course, there's metric and SAE so buy the set that has the proper size for your oxygen sensor(s).


http://www.2carpros.com/forum/automotive_pictures/60440_crowfoot_wrench_set_1.jpg



You'll also need a 3/8" ratchet and a couple long extensions.

When you replace them, make sure you put some anti-seize on the threads of the oxygen sensors before you screw the new ones in. The new sensors should already have some applied at the factory, but if not, then buy a tube and apply it yourself.
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Wednesday, February 21st, 2007 AT 6:53 PM

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