O2 Sensors - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 05-22-2006, 05:57 PM
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O2 Sensors

Where can I get O2 sensors for cheap for my 328i? Im assuming I want Bosch... AZ has them for $110 each. Would like to do the job for cheaper...

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#2 (permalink) Old 05-22-2006, 06:23 PM
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That is actually as good as I have heard in the recent past. I was ready to dish out $130 for each, but I will check AutoHaus now. Swing by pelicanparts. I haven't checked with them yet.

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#3 (permalink) Old 05-22-2006, 07:00 PM
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rexking, i just replaced mine (Bosch) on my 92' 325i and i got it for about $78. included s+h, i think. I'm pretty sure i got it from Bavauto. try there, they seem to have decent prices.

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#4 (permalink) Old 05-22-2006, 11:31 PM
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How many miles?

RexKing how many miles on your car? Were you getting any CEL codes? Some of the earlier O2 sensors weren't heated, so they're a little cheaper. But $110 is not a bad price for heated Bosch O2 sensors.





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#5 (permalink) Old 05-28-2006, 10:57 PM
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100,100 sorry bout the delay... think im gonna order them soon...

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#6 (permalink) Old 05-30-2006, 09:38 PM
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i replaced mine this weekend... i have a 92 and it was around 72 from bavauto... pre 96s only had one o2 sensor... post had 2... i see you have a 97 so i would make sure before just ordering which one you really need...

and oh one more thing... if you are going to do it yourself, there is a special tool to remove the sensor... it's only like 10 bucks... trust me, it will come in very handy...
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#7 (permalink) Old 05-30-2006, 10:46 PM
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made the order from bav auto, got the tool too. Im sure ill be back here if i have any issues doing the install.

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#8 (permalink) Old 05-30-2006, 10:54 PM
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Quote:
Originally Posted by RexKing86
made the order from bav auto, got the tool too. Im sure ill be back here if i have any issues doing the install.
Are you changing all on yours, or just the pre-cats? If you're changing all, you'll need 4.

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#9 (permalink) Old 05-31-2006, 04:40 PM
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Originally Posted by tomctx
Are you changing all on yours, or just the pre-cats? If you're changing all, you'll need 4.
Holy shit, theres 4?!?! I thought there was 1 before and one after!

i got my order today, are they all the same sensor? mine are 13884.

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#10 (permalink) Old 05-31-2006, 04:44 PM
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yeah, the post '96 has 4. One set on the left cat (front and back), one set on the right cat (front and back). Just had to change the fronts on the GF's 97.


Did you get the OEM plug on them, or are you wiring it yourself? If you're wiring it yourself, I think it's all the same sensor, IIRC.
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#11 (permalink) Old 05-31-2006, 05:00 PM
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Will I be ok if i just replace the pre-cats?
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#12 (permalink) Old 05-31-2006, 05:07 PM
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I am doing this due to a check engine light... will the precats only take care of the problem?

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#13 (permalink) Old 05-31-2006, 05:28 PM
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generally speaking, the pre-cat O2's die. Your car needs the same one (bosch 13884) for all four of the sensors.

Replacing the front ones should make your CEL go away, but there's no way of telling unless you hook it up to a diagnostic computer.

However, when my GF's CEL came on, we replaced the front O2's and it went away.

Good luck!
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#14 (permalink) Old 05-31-2006, 05:46 PM
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ill try my luck just replacing the front 2 and see what happens... thanks!

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#15 (permalink) Old 05-31-2006, 08:52 PM
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Front two should take care of it...

Rex the front two O2 sensors in the '97 328i you have should take care of it. One heated BEFORE each Cat, and one HEATED after each Cat. You can replace your front sensors and reset the light and you're probably good to go.

On the OBDII cars the O2 sensors are heated due to their operating design. On the older OBDI cars the O2 sensors are not heated and much less accurate.

The front O2 sensors is exposed to all the dirty exhaust gases, that's why they die at a much higher rate than the rears. Its actually rarely the rear sensors unless their heater elements just fail. The rear sensors get to breath clean exhaust gases AFTER they've gone through the Cat Converter. They really only change readings if the Cat has failed.






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Last edited by Hamfisted; 05-31-2006 at 09:18 PM.
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