Your Porsche consists of thousands of parts that age and wear and inevitably sometimes need replacement.
Porsche provide easily accessible technical details of every part of your car in the Porsche PET System for spare parts. For Australian cars you can download the complete catalog for your car from https://www.porsche.com/australia/accessoriesandservice/classic/genuineparts/originalpartscatalogue/
These pdf documents, which are many hundreds of pages, show your car reduced to individual nuts and bolts with itemised part numbers. If you like to order your own parts and have a tinker… ascertaining the Porsche part number makes ordering from Porsche or searching online a much more efficient process.
Please note these catalogs only provide the part numbers for genuine Porsche parts, and depending on your vehicle, and the part you’re looking for, there may be much cheaper aftermarket options available with a completely different part number.