Factory Dash Mic?

[Drewie]

This topic is quite outdated.
But anyway, there are in fact three types of microphone (lhd):

99664630704 - noise mic only (as Smallblock454 mentioned)
99664630702 - HF mic only
99664630703 - combined (two wired) noise + HF mic

If you change the red 7 to 8 you will get the mics for rhd.

I've found this post because I'd like to install some BT HF and wanted to use OEM mic. Too late I found out there are more mics and the one in my car is noise only