The top selling in-dash car AV/navigation deck year-to-date through October was the Pioneer AVIC-8100NEX deck, measured in dollar sales, according to the NPD Group.
Second in line was the Kenwood DNX692 followed by the third place ranked Kenwood DNX892 in dollar sales January through October.
We also looked at the best selling AV deck (in dollars) WITHOUT navigation. The top seller was the Pioneer AVH-4100NEX. In fact all 5 top selling No-Nav AV decks through October were all Pioneer models as shown below.
Source: The NPD Group