I'm pretty sure some of the 89s used the FX15 and the 93 used the FS10. However, I think they are compatible and that the hookups are the same. I did a search for both years on partsamerica.com and both showed up as the FS10. One was Factory Air 58121 Type FS10. This is the same brand and part I used for my A/C. It is a new unit, not a rebuilt which nobody recommends except for the manufacturer.