Part number 99970176141Source-mentioned candidate. Verify fitment and availability independently.
Cited source accounts
http://www.autoatlanta.com/porsche-p...section=103-00 #33 O-ring 28, 00x2, 0 N* - Genuine Porsche Six (6) required G99970176141 Not showing any O-rings on the coils, so that must be it. Also not showing spark plug tubes like on a 996 engine. Seems simple enough to replace after pulling the ignition coils.
Replace faulty ignition coils
ion=103-00 #33 O-ring 28, 00x2, 0 N* - Genuine Porsche Six (6) required G99970176141 Not showing any O-rings on the coils, so that must be it. Also not showing spark plug tubes like on a 996 engine. Seems simple enough to replace after pulling the ignition coils.
Replace the spark plugs
This is a source reference. Confirm exact model applicability in the original material.