I am slowly gathering the parts to convert my 2018 4 inch radio to the 8 inch. I have noticed on ebay that there are several companies saying the apim they are selling is a gen4. They come loaded with software version 3.4. Can anyone confirm that there is indeed a gen4? Or is this a lot of smoke?

Thank you for your response.

 

i just change my sync 2 to sync 3 gen 1 with nav ver 1.0 updated to 3.4 no issues at all also have a spare sync 3 gen 4 i had issues updating to 3.4 the differences is the newer gens are more expensive