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2003 my03 outback O2 sensor- 3 or 4 wires?

Posted: Mon Mar 03, 2014 9:58 am
by nvmylh
Hi all,
Looking at replacing the O2 sensor in the outback but have notice that it only has 3 wires whereas the bosch recommended universal sensor has 4..

Has anyone here used the universal sensor and just not had to use 1 wire?
I believe the bosch part number is 0258986507 or 0258007084
Thanks

Posted: Thu Mar 06, 2014 9:25 am
by nvmylh
Found an old comment from Gannon saying that you can use the 4 wire sensor and just wire the earth to the exhaust or body. Heater and signals wires stay the same..

Posted: Thu Mar 06, 2014 4:49 pm
by Point
I just replaced the front one on mine and it was a 4 wire. I got a Denso the same as the original for what I thought was a reasonable price. Mine was a 22641 AA140, it is written on the sensor, so check yours to be sure. They are listed on ebay for about $200.

BTW, my car is a 7/2002 MY03 XS Lux

Posted: Thu Mar 06, 2014 6:18 pm
by Gannon
Yup just throw a crimp on ring lug on the ground/earth wire and put it under a bolt into the body or engine

Posted: Thu Mar 06, 2014 10:14 pm
by nvmylh
Thanks Gannon, ps how did you ever go with that exhaust you were making?? We emailed a couple of times.. I thinking of doing another, maybe a 4 into 1 this time

Posted: Fri Mar 07, 2014 5:03 am
by Gannon
Havent got any further with it. 2 mortgages, 2 kids and full time work doesnt leave much time for playing