What O2 sensor socket size? - SR20 Forum
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Old 02-14-2007, 06:35 PM   #1 (permalink)
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What O2 sensor socket size?

So i pulled a code for a rea O2 sensor shorted on my G20, i need to replace it but i need to buy a O2 sensor socket...i looked at Sears and they have a universal O2 socket that says it fits SOME O2 sensors but doesn't specify which ones.

Does it matter if i buy a universal socket? Or are all sensors the same size? I just don't wanna go spending 50 bucks on a quality socket if it won't even fit mine....

TIA

PS What site is the best to use to buy O2 sensors?
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Old 02-14-2007, 06:40 PM   #2 (permalink)
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most are all the same but a 7/8 combination wrench should do the job if you got one
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Old 02-14-2007, 07:22 PM   #3 (permalink)
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The rear O2 is either a 17mm or a 19mm. I use a flare nut wrench on those, since they are usually rusted from being under the car.
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Old 02-14-2007, 07:57 PM   #4 (permalink)
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im assuming a 7/8 open ended wrench? i got one of those but someone told me to buy a O2 sensor socket as to not potentially strip the sensor
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Old 02-14-2007, 08:27 PM   #5 (permalink)
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7/8" line wrench works good for me
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Old 02-14-2007, 08:36 PM   #6 (permalink)
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Which sensor, the front or the rear? Your original post says

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So i pulled a code for a rea O2 sensor shorted on my G20, i need to replace it but i need to buy a O2 sensor socket...
When you put rea, I'm assuming you meant rear.
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Old 02-15-2007, 12:06 PM   #7 (permalink)
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oops yes i meant rear...
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Old 02-15-2007, 12:16 PM   #8 (permalink)
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The rear is not a 7/8 or 22mm, those are too big. The rear is either a 17mm or a 19mm. Find a flare nut wrench with both, and that will work. If you are going to replace it anyway, you can cut the wires and use a closed end wrench to remove it.
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