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E36 General discussion and technical help for 1992-1998 3 series cars.

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Old 05-10-2005, 10:40 AM   #1
Fadec40

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O2 Sensor replacement

This is more of a poll about oxygen sensor replacement.

If you have changed your O2 sensors, how much trouble, if you had any, in removing the old sensor?
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Old 05-10-2005, 10:56 AM   #2
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Only trouble would be seizing up and tring to get it loose.. really...
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Old 05-10-2005, 11:36 AM   #3
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I'm actually curious if anyone could not remove the old one at all.
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Old 05-10-2005, 01:34 PM   #4
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I removed mine in 2 minutes... get some "bolt" loosener and spray it on, there and go for it.. use a little muscle and it'll come off.
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Old 05-10-2005, 02:41 PM   #5
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I couldnt get mine off. I could not get enough leverage. I didnt have the proper O2 removal tool tho. Had a local shop do it for $20. Money well spent.. In all fairness the guy said there was no way I would have gotten it off in my driveway..
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Old 05-10-2005, 11:21 PM   #6
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Thanks all for the replies!
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Old 05-11-2005, 02:24 AM   #7
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as a continuation for this thread how many O2 sensors are on a 96 328is. i have heard everything from one, two, or four.

how much do they cost?
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Old 05-11-2005, 08:49 AM   #8
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On OBD II cars, 1996 onward, you should have 2 per catalytic converter. Since you have 2 cats, 4 sensors. I haven't had to buy one yet, so not sure how much they cost.
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Old 05-11-2005, 09:04 AM   #9
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they arent cheap..like $85 is the cheapest i've seen from bimmerworld.. OBDII cars I thought had 2 pre cat sensors and 2 post cat sensors- 4 total. And that they only have one cat.. That is what I've been told
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Old 05-11-2005, 12:12 PM   #10
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I only see one behind my cat. so I have a total of two.
ODBII 98 323is
but then again, I have a single pipe all the way back.
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Old 05-11-2005, 12:49 PM   #11
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The 1996 and onward have the same number of cats (2) as the earlier models of the E36. The exceptions are the 323 and the 318.
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Old 05-11-2005, 07:29 PM   #12
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if i get an OBDII scan, will it tell me which ones have failed?
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Old 05-11-2005, 11:33 PM   #13
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Yes, it should. I don't remember the exact terminology the scan uses though.
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Old 05-27-2005, 12:54 PM   #14
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Quote:
Originally Posted by Spieluhr
if i get an OBDII scan, will it tell me which ones have failed?
This is just the thread I was looking for

Yes it will, I think mine is bad, the code it gave me was:

P0155 code: O2 Sensor B2 S1 Htr Circuit Malfunction . So, the 02 sensor of the second bank sensor 1 has a heater circuit malfunction.
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Umnitza now provides a mechanic to install all parts ordered right in the box! It's their new "Total customer service program" that will eliminate all the haters and keep incompetents from breaking shit and blaming the vendor! When you are all set simply call INS and they will pick him up free of charge.
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Old 05-27-2005, 03:03 PM   #15
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I only remember seeing one cat on my old xpipe... are you sure my car had 2?
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Old 05-27-2005, 09:09 PM   #16
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yeah, I am 200% sure, we acutally have 4 cats...
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Quote:
Originally Posted by Gregg
Umnitza now provides a mechanic to install all parts ordered right in the box! It's their new "Total customer service program" that will eliminate all the haters and keep incompetents from breaking shit and blaming the vendor! When you are all set simply call INS and they will pick him up free of charge.
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