Question about 2002 Mercury Villager
Correct, called upstream and downstream. look at the exhaust pipe running under you car only two electronic parts(wires) should be plugged in to it. one is right on the exhaust manifold/header(header comes out of the cylinder head) and one right after the catalytic converter. if you have any engine besides the 4 cyl such as a v6 you might have more than two. the easy way to change it is to spray it with wd-40 or equivalent penetrant, cut the wires and use a breaker bar and socket of the right size, that is assuming you everything ready to get the job done.
Posted on Nov 05, 2010
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Posted on Jan 02, 2017
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