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Originally Posted by eappiah
How many Oxygen sensor/s do 1994 Bonneville, 3.8L SE has?
And where are they located. I found one at the back of the engine block on the exhaust line leading to the catalytic converter.
Thank you
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1994 Bonneville 3.8L SE only has 1 O2 sensor and that is located in the rear exhaust manifold.If you are wanting to replace it,only use an AC-Delco as Ive seen other's have problem's with the Bosch after a few thousand miles.Part # for an AC-Delco O2 is AFS75 or GM part # 25312184 and you can find them new on Ebay from time to time for about 30/40 bucks or you can get it from
www.gmpartsdirect.com for $45.49 shipped VS dealer list is $75.09.You will also need an O2 socket to replace the sensor and dont forget to buy some PB Penetrating Catalyst that will aide in the removal of the O2.
~Larry~