Skip to content. Toggle Navigation. Frequently Asked Questions; News; Company Profile; Disclaimer. Cheap Vehicle GPS, Buy Quality Automobiles & Motorcycles Directly from China Suppliers:Plug & Play Auto Play Adapter for Porsche PCM 3.1 Cayenne Macan Panamera support Siri command, OEM Knob operation Enjoy Free Shipping Worldwide! Speedrunners crack. Limited Time Sale Easy Return. The MAP update for PCM3.0 (987.2) and PCM3.1 (981) is the same. The operating system software (firmware) updates are slightly different. TTBOMK the latest PCM3.0 firmware is 2.24, and the latest PCM3.1 firmware is 4.75. Bear in mind that the latest maps are 04. Resolving PCM Issue: SiriusXM Satellite Radio has recently sent out an update to all satellite radios that has in turn effected some Porsche Communication Management (PCM) systems. Porsche Cars North America has passed along the following instructions to reset your PCM and restore functionality.