most guys on the board are going to recommend the same thing i am getting ready to tell you ==> go with the used oem from ebay, your local pick and pull, or from someone on this site.
the aftermarket versions, IMO, are worthless.
i could wax all day on cheap a$$ aftermarket parts made for our beloved volvos... my three day (return & replace & return & replace & test everything in the world & replace) drama with an aftermarket alternator being one.
plus, i have bought many aftermarket parts for my ride & have found quality to be seriously lacking.
in this case, with an amm, go with oem -used is better than reman.
a new used bosch unit is going to be trouble free.
while you got the amm out... change the air filter, remove & clean the box, replace or remove the air box thermostat (controls the flap door... if you remove it remove the door), check/clean the air intake tube (accordian like tube going to throt. body), remove & clean the throttle body.
all easy to do in a couple of hours with basic hand tools.
2 cents.

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'Be who you are and say what you feel because those who matter don't mind and those who mind don't matter.' - Dr.Seuss
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