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Old 02-14-2005, 11:39 PM   #1
bigpaulo
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Default who makes the Subaru OEM front oxygen sensor?

Is it made by Bosch? Or someone else?

Because around Boston, an OEM 02 sensor goes for about $80, and a Bosch 02 sensor from AutoZone goes for about $130.

Is the Bosch sensor that much better, i.e. planar ceramic type 02 sensor, versus heated thimble type for the OEM?

Thanks for any light you can shed on this discrepancy!
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Old 02-15-2005, 12:05 AM   #2
Uncle Scotty
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The oem one isn't a 'wideband' sensor....it only really measures enough A/F for the ECU to adjust the A/F to make the car run properly and no more.....
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Old 02-15-2005, 10:15 AM   #3
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Uncle Scotty, are you saying that the planar ceramic oxygen sensors are by definition wide band sensors?

And I'm still curious as to who makes the OEM Subaru oxygen sensor...
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Old 02-15-2005, 10:26 AM   #4
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I believe it's Denso. Don't quote me on that, though. Have you tried looking at the sensor itself?

IIRC the 02 sensors in the 2.5RS (98-01) were Bosch. Not sure on the A/F ratio sensor.
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Old 02-16-2005, 12:03 AM   #5
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Does anyone have any opinion on whether the Bosch oxygen sensor is worth the markup over the OEM Subaru sensor?
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Old 02-16-2005, 10:09 AM   #6
Mike Wevrick
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I would say no. Since its OEM I'm sure it does what Subaru thought it needed to do.
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Old 02-16-2005, 10:45 AM   #7
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Quote:
Originally Posted by Mike Wevrick
I would say no. Since its OEM I'm sure it does what Subaru thought it needed to do.
By that logic, we'd all still be using Champion spark plugs. Sorry, I just can't buy that argument.
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Old 02-16-2005, 11:53 AM   #8
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All this discussion begs the question: who makes the REAR OEM oxygen sensor??/?
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Old 02-16-2005, 01:35 PM   #9
speedyHAM
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The front and rear OEM O2 sensors for an '02 WRX are made by DENSO. It's printed on the O2 sensors and since I was under my car for a while last night I got a really good look at them.
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