actually lookin at it further..
the beginning 98AB looks like it belongs at the end... the first 4 are usually either Yxxx or 2xxx for our cars...
The part in question is the plastic frame that the dome light assembly snaps into.
The piece broke on mine and when I examined it, all I could find was the alpha-numeric string I posted...
Someone in the Interior Mods section stated it should be easy to take the piece to the dealership and order a new one, but I tried that and the parts guy said it's part of the headliner and a new one would cost $380
If you could find a part number for that, I'd appreciate it because I cannot fathom why they want $380 for a part is CLEARLY a seperate piece...
Here's a pic of it:
(You can see the frame that the clear domelight assembly fits into)