sorry...
The part replaced was the Passenger Side Multiplex Control Unit.
Part # 38850-S84-A23.
This was for a 99 Accord EX 4-dr. My understaning is that the unit is different depending on trim level and # of doors (4 dr or 2 dr). So don't go by this part # alone.
Looking at the bill, Honda charged me $225 for labor!!! My understanding is that this is not a hard job, although I do not have any instructions. You do have to reprogram your remotes after replacing the unit....