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Old 02-22-2001, 02:18 PM   #1
Scooby Specialist
Member#: 1182
Join Date: Mar 2000
Location: Ventura, CA

Question Recall O2 sensor before or after MRT exhaust?

I'm getting the MRT full exhaust system from the first GB. I just got a notice for the recall of the front O2 sensor. I read some comments in the Borla header threads about possible fumes from the newly crafted header fouling the O2 sensors.

My question is, should I get the O2 sensor replaced before or after I get the MRT exhaust? The dealership whining about my exhaust is not my concern, but the effect (if any) on "new exhaust" fumes killing the new O2 sensor is.

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Old 02-22-2001, 02:52 PM   #2
Scooby Guru
Member#: 1594
Join Date: Jun 2000
Chapter/Region: MWSOC
Location: Carson, IA
1999 2.5 RS
2002 Legacy


What MY is this recall for?

Get it before the exhaust... No questions ask.
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Old 02-22-2001, 03:37 PM   #3
Scooby Specialist
Member#: 1182
Join Date: Mar 2000
Location: Ventura, CA


I have a 2000 RS. It wasn't for all 2000's either, just within a certain production date range. If you're affected you should (should have) received a letter from SOA.

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Old 02-22-2001, 05:23 PM   #4
Scooby Newbie
Member#: 567
Join Date: Nov 1999
Location: La Habra, CA, USA

i got one of those notices. i think it was for 2000-2001 imprezas and foresters. i didn't really read the whole thing because my car was already at the dealership. i just asked them to check it out while they have it there. but it is something about a bad first O2 sensor...
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Old 02-22-2001, 08:06 PM   #5
Fred Fredburger
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Member#: 2539
Join Date: Oct 2000
Location: Snohomish, WA, USA

I think if you fall into the recall category, you should put on the MRT exhaust with the current O<sub>2</sub> sensor, drive for a week then put the old exhaust back on and get your O<sub>2</sub> sensor replaced by recall. Then any of the "burn off" crap from the MRT would have fouled up your soon-to-be-replaced O<sub>2</sub> sensor.
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Old 02-22-2001, 08:09 PM   #6
P.K. Motorsports
Scooby Specialist
Member#: 1110
Join Date: Mar 2000
Location: USA
1999 RS


The O<sub>2</sub> sensor thing has been going on since before the 2000 model year. My ex's L went through 2 within 10,000 miles back in early 1999.

Does anyone know offhand just what one of these sensors costs? I have not tried to look it up in the book at the parts store, but a lot of O<sub>2</sub> sensors are interchangeable, so much so that you can buy an adapter for Toyotas which allows you to use standard (spark plug-threaded) GM O<sub>2</sub> sensors. Before I decide what's "worth" it I'd like to know how much money I'm talking about.
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