Vw are ok but some other brands are a pain, I have a D22 Navara Dx cab chassis , I bought a 6 stacker off Ebay out of a D40 2012 model . ,The owner had a GPS unit installed by Nissan , but did not have the pin Nissan told me it would only work in that particular car,
So I thought I had bought a mantle piece, until hooked it up and it worked with out the pin , and has worked flawlessly for over 1 years .When I rang NIssan back complaining that their vehicle Security was useless as the radio worked with out any pin they could not supply an answer ,