Does anyone have a pic of the oil separator bellows?

[Burg Boxster]

The bellows (circled in blue below) come with a new AOS when you order part #996-107-023-04 ($76.50 last summer from Sunset). The newest j-tube (not 100% required if yours is clean) is part #996-107-145-06 ($24.22 again last summer from Sunset).



Here's a link to the DIY I used for replacing mine.
Mike Focke's AOS Replacement DIY

I definitely recommend doing this a preventative maintenance. Took me under 1.5 hours to DIY at a total cost of $110 (including shipping on the parts). Dealers are known to charge $500-800 to r&r. Definitely DIY.... as long as you know how to take a wheel off and put the back end up on jack stands (not in that order though )

Incidentally, You can order the bellows on their own (don't have p/n). However, if you're going to all the trouble to replace them, it's in your best interest to replace the entire AOS. The bellows do fail on their own, but the bladder inside the AOS is much more likely to fail.... first.