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I bought these crap o2 sensors from Amazon n they kept throwing codes. I just bought o2s from the factory n I have the wrong item number. I have a 2004 Dodge Durango 4.7 SLT. My bank1-sensor1, bank2-sensor1, and bank2-sensor2 part number is 56028998AA. For my bank1-sensor2 the part number is 56028999AA. I was sent a part number saying 56028999AB instead of AA. I would like to know if this part would still fit and function as properly as the AA part. I would also like to know where is the best place or site to buy good quality- OEM parts. Thank u
 

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1988 Dodge Dakota LWB RC 3.9V6 3 speed auto
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To amplify AandPDan's answer, the AB will fit and work perfectly as an AA replacement.

Shucks, the AB may mean they're from company B instead of company A, but still meet Mopar's requirements.

RwP
 

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I've bought both those same two O2 sensors for my truck (AB Part numbers), and have no issue with them.

I find that Mopar Parts Direct is a great source for OEM parts, although there are a few others too.
 
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