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the best thing you could do is sell that mounaineer and get a new car, problem solved, you're welcome.

I just purchased one for my 1997 merc mountaineer, i was up under it and found that the transmission cross member makes it very hard to get to, i may have to remove the cross member and support the tranny with hyd jack while i replace it, I allready know that you will have to modify a wrench, ie: cut off or shorten so as to be able to tighten the plug. This is where one of those times where the metric matches the American size. You can use a 7/8" end wrench or a metric size which ever you prefer. If I find an easier way I will let you know. I wish you well in your endeavor.

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โˆ™ 2011-09-12 20:43:42
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Q: How do you replace a front oxygen sensor on a 1997 Mercury Mountaineer?
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