who makes the Subaru OEM front oxygen sensor?

bigpaulo · 02-14-2005, 10:39 PM

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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Uncle Scotty · 02-14-2005, 11:05 PM

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.....

bigpaulo · 02-15-2005, 09:15 AM

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...

Porter · 02-15-2005, 09:26 AM

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.

bigpaulo · 02-15-2005, 11:03 PM

Does anyone have any opinion on whether the Bosch oxygen sensor is worth the markup over the OEM Subaru sensor?

Mike Wevrick · 02-16-2005, 09:09 AM

I would say no. Since its OEM I'm sure it does what Subaru thought it needed to do.

bigpaulo · 02-16-2005, 09:45 AM

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.

poison · 02-16-2005, 10:53 AM

All this discussion begs the question: who makes the REAR OEM oxygen sensor??/?

speedyHAM · 02-16-2005, 12:35 PM

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.

02-14-2005, 10:39 PM	#1
bigpaulo Scooby Newbie Member#: 17655 Join Date: Apr 2002 Location: Massachusetts Vehicle: 2002 Impreza TS low profile green	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! * Registered users of the site do not see these ads.

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02-14-2005, 11:05 PM	#2
Uncle Scotty NASIOC Supporter Member#: 16200 Join Date: Mar 2002 Vehicle: OK Houston we have an Uncle	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.....

02-15-2005, 09:15 AM	#3
bigpaulo Scooby Newbie Member#: 17655 Join Date: Apr 2002 Location: Massachusetts Vehicle: 2002 Impreza TS low profile green	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...

02-15-2005, 09:26 AM	#4
Porter NASIOC Supporter Member#: 486 Join Date: Nov 1999 Chapter/Region: MAIC Location: Roanoke, VA Vehicle: 2004 Forester XT bug spattered	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.

02-15-2005, 11:03 PM	#5
bigpaulo Scooby Newbie Member#: 17655 Join Date: Apr 2002 Location: Massachusetts Vehicle: 2002 Impreza TS low profile green	Does anyone have any opinion on whether the Bosch oxygen sensor is worth the markup over the OEM Subaru sensor?

02-16-2005, 09:09 AM	#6
Mike Wevrick RIP 1/19/64 - 7/23/11 Scooby Guru Member#: 24654 Join Date: Sep 2002 Chapter/Region: NESIC Location: saraseager.com Vehicle: 1957 Taggart Comet atlasshruggedpart1.com	I would say no. Since its OEM I'm sure it does what Subaru thought it needed to do.

02-16-2005, 10:53 AM	#8
poison NASIOC Supporter Member#: 37678 Join Date: May 2003 Chapter/Region: SCIC	All this discussion begs the question: who makes the REAR OEM oxygen sensor??/?

02-16-2005, 12:35 PM	#9
speedyHAM Scooby Specialist Member#: 48377 Join Date: Nov 2003 Chapter/Region: MWSOC Location: "They eat fish soaked in lye" Vehicle: 1996 Gutted, built XP class Impreza L	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.