They used to... The AOS came with the accordion shaped hose.

I have not replaced an AOS in the last 4 years so things must have changes. Does not surprise me, the parts suppliers look for more ways to gouge us.

Shows the hose in the photo:

https://www.pelicanparts.com/More_Info/99610702304M100.htm?pn=996-107-023-04-M100&bt=Y&fs=0&SVSVSI=1048

I see my confusion. I thought you were referring to the hose/tube that connects the top of the AOS to the intake... and I was wondering what you meant by "included". Then I saw your post and realized you were talking about that hose at the bottom of the AOS... yes, the accordian. That and the clamp seperately I purchased. Fromn Pelican. ;)

That top tube I had to replace because the AOS had been redesigned since the original. That tube cost me ~$35. I had a fix in place (the original tube with a section cut out and a piece of hose clamping the two pieces together). My OCD took over and I couldn't stand that ugly part snaking across the top of the motor.

:cheers:

They specialize in volkswagen. Here's the pictures of the leaking hose they said. I am confused that these hoses are before the MAF. The air should be adjusted. Thanks for any help!
http://986forum.com/forums/uploads02...1596848125.jpg
http://986forum.com/forums/uploads02...1596848133.jpg

Tim, You might have other vacuum leaks besides the AOS. If your mechanic did a smoke test he might have found a cracked hose(s). BUT, if you have major suction at the oil fill tube the AOS is bad.

Yeah. I did see a lot of signs of AOS failure. Like, the car runs rough at idle only when it starts from cold.

I am just curious that does the fault code relates to the failed AOS or the leaking hose.

Yes, a bad AOS will trigger those fault codes. I have seen it a few times.

Thanks. I am gonna work on those. I just replaced the engine air filter. Some oil residual on it. Another sign of failed AOS?

You shouldn't be seeing oil on the air filter unless it was a K&N reusable filter, Tacky Oil is used on those. I can't imagine someone spraying tacky oil on a paper filter... but???

A bad AOS will cause oil in the intake cross-over tubes. One of the signs of a bad AOS is smoke at start-up... Have you experienced that?

Tim, you're getting good help here from Jager, so I hesitate to interrupt.
However:
I have seen oil (in small amounts) get to the air filter due to a bad aos, when combined with a poorly running engine.

Under normal conditions air only moves in one direction through the intake tube. However: if your engine "backfires", even just a slight stutter or a cough, then yes, you can see air moving the other direction, though only momentarily. I wouldn't worry about it at all, for the moment, as you could end up chasing squirrels that aren't there. I would focus first on your AOS, then on your vacuum leaks.

Then let us know how it goes.

Sent from my SM-G970U using Tapatalk

No doubt backfires would throw oil onto the air filter if you had oil in the intake/throttle body. I have not seen that since I have never had a Porsche motor backfire.

So Tim, has your motor backfired??

I think I never experienced that. But you are right, I used K&N air filter!

There are no hoses that enter the intake before the MAF sensor.
If there is a vacuum leak in the hoses that you are pointing to, then that air is not adjusted.
The vacuum leak in those hoses is part of your problem.