I just bought a refurbished one recently with part number AWR1012 for a 96 RR, mine says its for a 97 RR with part number awr5051. i checked my vin, its a VA358193. online my vin says that i should be getting the awr5051 hevac, just like my original hevac. i was just wondering if those two are interchangeable? because i might have to return the one i bought and get it exchanged for the right part number. I just want to know if i do use the older hevac awr1012, would it cause any trouble or problems. thank you and much appreciated!