2001 Villager - ECM replacement
 

My 2001 Mercury Villager Sport's ECM need to be replaced per my mechanic

I'm looking for a used ECM to replace it.

Numbers on my ECM are: MEC07-301 A1 0Y29

I see used one's on ebay with same numbers except the last four: 0Y29 are different.

Do I need an exact match, or can I swap it with any ECM with MEC07-301 regardless of the last four letters?