Join Date: Feb 2009
Drives 2003 Santa Fe 2.7L v6
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Sorry, you are correct that the 2.7 liter has Bank 1 as the rear bank. As shown in your diagram, where the 3 exhaust runners join to one exhaust runner (maybe 3 inches below the merge point) is the O2 sensor. You will have a difficult time to reach from either top or bottom. Removing the upper intake manifold will help to give you access from the top. What a pain.
Sorry to dredge up a ~6 year old thread, but do you know where Bank 1 Sensor 2's 02 sensor would be located? I'm driving the same vehicle as OP. 2003 Santa Fe, 2.7L AWD<<--- add that to your "DRIVES" in your profile
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