How to replace air filter?
 

Is it easy to replace air filter? If so, can someone tell me how to do it? I just did my oil change, it's really easy. Thanks in advance.

I've never done this, since my Box is only a few thousand miles old, but I do have the factory workshop manual. As with other Porsche factory manuals, it assumes you've "taken the course" and isn't intended for neophytes. Therefore, it says absolutely nothing about where the air cleaner is, since it assumes 1/you already know that or 2/can certainly figure out where the induction system is and where a filter element might reside.

Assuming you can do the latter, which I would guess is done by taking off the engine compartment cover behind the seats--I repeat, I have yet to work on the car, though my 911 is no secret to me--the filter element lives inside a drawer-like arrangement that is withdrawn upward at about a 35-degree angle, judging by the illustration in the manual, after "pressing out spring clips." You then pull out the drawer, clean the air-cleaner compartment (with a vacuum, _not_ compressed air, it warns, since the latter can damage the mass airflow sensor) and replace the element where the old one came from, then push it back in and replace the spring clips.

How hard is it? I haven't the faintest idea.

Stephan

The air cleaner (plastic box with filter inside) is on the driver's side of the engine bay right at the top. Very easily accessible once you remove the engine cover (your owners manual has instuctions on how to remove the cover from engine compartment).