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December 12, 2017 Service bulletin

Optimized software for Porsche Communication Management (PCM) 4.0 has been used in standard production in...

Porsche technical service bulletin 122-E9N4X-01 for 2017 Porsche Cayenne, 2017 Porsche Macan and 2017 Porsche 911 and others.

Bulletin number
122-E9N4X-01
Component
Electrical system: software
Summary
Optimized software for Porsche Communication Management (PCM) 4.0 has been used in standard production in order to further improve the general performance of the system. These optimizations must be implemented retrospectively even for vehicles manufactured before the date of introduction. Action Required: ? Update PCM software using an SD card ? Re-code the PCM using PIWIS Tester test software version 34.800.030 (or higher

Owners of these vehicles have filed 12 complaints in the electrical category.

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