PIWIS (Porsche Integrated Workshop Information System) Tester 4 is the official diagnostic and programming interface for all Porsche models from 1998 onward, with full support for current and upcoming electric vehicles (including the Taycan and future PPE-based models). It replaces the PIWIS Tester 3, offering faster communication, enhanced cybersecurity, and a more intuitive user experience.
This is the "killer app." When a fault code appears (e.g., "P1442 – Tank leak diagnosis module"), the doesn't just show the code. It forces the user through a guided tree test plan. It displays wiring diagrams directly from Porsche’s servers, shows pin-out measurements for your multimeter, and tells you exactly which relay to click. piwis tester 4