There are multiple threads about Bluetooth pairing failures for Gen 7 facelift models. Most of these problems are due to hardware failures as a result of low quality soldering (dry joints) in the Bluetooth module manufactured by Johnson Controls.
I just had a look at the FCC pages for the 08-12 and the 13-etc. Bluetooth modules, and whilst these are still manufactured by Johnson Controls, the modules have different boards. For starters these are single boards (the Gen 7 was an interlocking dual board design).
You would think that considering the failure rates of the Gen 7 modules Johnson's would have improved QC on the later boards..
If it is any consolation, Ebay prices for Gen 8 and later OEM modules seem to be lower than Gen 7. (US Ebay prices)
Link to Gen 8 board. (BT chip + antennae top centre of board)
Link to Gen 7 BT module interior (BT chip + antennae shown in detail shot)
BTW (important) the Gen 8 module was available with different housings for different model Hondas
and have different Honda part numbers. They all contain the same board and all are labelled
CB2BLUEC08
For advanced nerdery this is the
FCC link to the 2013 module which is a different design again (I can't see a PCB antennae on this board - perhaps it was external..?)
Curiously, the Gen 7 board BT output was 3mW, the Gen 9 1.7mW and the last version 1.5mW