Having had a recent oil and filter change at time of purchase, I thought I would replace the air filter and pollen filter, both very simple operations.
Removing the airbox lid is simple, unplug the AFM and unclip the wiring harness from the airbox, undo the hose clip onto the throttle body unscrew the 7 retaining screws, disconnect the oil filler tube and lift the lid clear and away. It was good to see the throttle body was lovely and clean, but it got a wipe out with some air intake cleaner just to be sure.
I also removed the base of the airbox to allow it to be cleaned thoroughly – make sure you do not lose the mounting rubbers on the two spigots on the base of the airbox. Replace the filter and refit. I used a Mahle air filter, part number LX 582/1.
The pollen filter is at the front under the panel to the right. Undo the retaining screw – you may want a new captive nut as they can seize (refit with anti-seize paste on the screw threads!). The filter lifts out easily. Again I used a Mahle filter LA 32/2 supplied by my local motor factor. Oddly enough the one they supplied me wass for a Peugeot 406! Apparently it is what they supply the local Porsche specialist, and it fits fine, so who am I to argue?
The official Mahle pollen filter for 996 is Part#LA32/3. Dimensionally it measures 38.3mm (h) x 327mm (l) x 163mm (w). The filter used measures 43.2 x 326 x 163, fits perfectly and is half the price!