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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 08-13-2015, 04:12 PM
BluesFan44 BluesFan44 is offline
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Location: Marissa, IL
 
Join Date: Apr 2015
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Mein Auto: 1996 BMW Z3
O2 Sensors in 4cyl M44 1996 Z3

Good afternoon,

After having some AC work done, I'm getting a P0130 Oxygen sensor code (details) and CEL on my Z3. Based on everything I've read, this seems to be coincidence. Looking around the net for O2 sensors, prices seem to vary widely. Can an aftermarket one for ~$30 serve me well, or should I bite the bullet and drop three figures on an OEM?

Also, since the car is approaching the 100,000 mile mark, I'm considering just replacing both while I'm under there. Seem reasonable?

Thanks in advance

BluesFan44

Last edited by BluesFan44; 08-14-2015 at 11:53 AM.
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  #2  
Old 08-13-2015, 04:27 PM
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vintage42 vintage42 is offline
BMW CCA 1405
Location: Louisville, KY
 
Join Date: Jun 2007
Posts: 2,347
Mein Auto: 1997 BMW Z3 1.9 5MT
I have heard in forums that aftermarket O2 sensors do not last as long as OEM.
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  #3  
Old 08-13-2015, 07:33 PM
Blacklane Blacklane is offline
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Location: Springfield, Ohio, USA
 
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Mein Auto: 1998 Z3 Roadster
I forget the details, but there are two materials used to make oxygen sensors: the cheap stuff and whatever BMW uses. The difference in performance is how quickly it starts working as it warms up. The cheap ones won't work well enough to keep the BMW CEL test from tripping.
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Old 08-14-2015, 07:00 AM
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vintage42 vintage42 is offline
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Mein Auto: 1997 BMW Z3 1.9 5MT
That must have been what I heard -- aftermarket was failing somehow. People who got them were replacing them pretty soon but I didn't know why.
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Old 08-14-2015, 08:04 AM
BluesFan44 BluesFan44 is offline
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Location: Marissa, IL
 
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Mein Auto: 1996 BMW Z3
Yeah, I figured the "you get what you pay for" rule applies once again.

Perhaps I should start a crowdfunding campaign to finance all this stuff....
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