A few quick O2 sensor questions. - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 11-23-2005, 12:15 PM   #1
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Default A few quick O2 sensor questions.

Hi All,

After doing some searching and reading on this site, I've decided to change the O2 sensor on my 1995 SLE. It'* never been changed and I have 133,000 miles on the car. I remember I used to get better gas mileage, but I never thought to change the O2 sensor. I have a few questions:

1) Does it matter if I get an AC Delco sensor or one from GMPARTSDIRECT. (I know to stay away from the Bosch)?

2) I can find the price of the GM part but not the AC Delco sensor. Are they similar?

3) The part numbers I've gotten from this site are:

AC Delco - AFS75
GMPartsDirect - 25312184

I just want to confirm that these are correct.

4) It sounds like the AC DElco unit comes with the anti-sieze compound on the threads. Does the GM unit come this way?

5) Can this change be done without the special tool to change the sensor? I assume, given its location, it'* easier to change the sensor from above (as opposed to accessing it from underneath the car)

Thanks for any help. I always like to get as much information before I embark on a job (as usual my brother has kindly offered to help).


Sincerely,
LeifW
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Old 11-23-2005, 12:23 PM   #2
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Default Re: A few quick O2 sensor questions.

Quote:
Originally Posted by LeifW
Hi All,

After doing some searching and reading on this site, I've decided to change the O2 sensor on my 1995 SLE. It'* never been changed and I have 133,000 miles on the car. I remember I used to get better gas mileage, but I never thought to change the O2 sensor. I have a few questions:

1) Does it matter if I get an AC Delco sensor or one from GMPARTSDIRECT. (I know to stay away from the Bosch)?

2) I can find the price of the GM part but not the AC Delco sensor. Are they similar?

3) The part numbers I've gotten from this site are:

AC Delco - AFS75
GMPartsDirect - 25312184

I just want to confirm that these are correct.

4) It sounds like the AC DElco unit comes with the anti-sieze compound on the threads. Does the GM unit come this way?

5) Can this change be done without the special tool to change the sensor? I assume, given its location, it'* easier to change the sensor from above (as opposed to accessing it from underneath the car)

Thanks for any help. I always like to get as much information before I embark on a job (as usual my brother has kindly offered to help).


Sincerely,
LeifW
The part numbers are correct.... That part is the GM part... But AC Delco has one PN on the Bag as well as the GM PN... When you get the Bag( AC Delco ) you will see both of these part numbers on the bag... You can get this sensor from your dealership... Some are better than others price wise... I think I usually run about $47-48 or so including shipping

Good Luck

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Old 11-24-2005, 03:42 AM   #3
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It can be done with a good sized open end (or box end if you disconnect the connection first) wrench, but it is a much easier job with the proper socket. Some of the sensors can be a bit tough to break loose, so you'll want some extra leverage. If you don't want to buy one, I believe Autozone has a loaner. Yes, it'* easier to get from above.
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Old 11-24-2005, 04:58 PM   #4
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some come out easily and others fight you tooth and nail.
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Old 11-24-2005, 08:45 PM   #5
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My mileage is about the same, is this a good time to replace the o2?
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Old 11-25-2005, 12:50 AM   #6
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It can't hurt...

Hows your MPG doing lately?
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Old 11-26-2005, 12:30 PM   #7
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No idea, I havent ever calculated it. Sorry to hijack the thread
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