Okay, I just received my armrest extension in the mail.
The guy I bought it from said he had it in his 2002 and I own 2004.
It should fit then right?
It screwed in perfectly, but the problem was that the bottom cover doesn't fit on. The extended armrest looks long and wont lock with the cabinet.
He also gave me an extra piece with the armrest and I have no clue what it is for.
I will post up a picture of everything in like an hour.
BUT PLEASE HELP ME

 

Mine doesn't click shut either. There is a plastic clip that seems to commonly break off on the aftermarket one. I talked to the dealer and they do not sell it separately like they do for the OEM lid, so there's little chance of getting the clip.