Is there a way for me to use by factory bluetooth mic in my 2011 sienna with the z130BT?

Thanks

Most likely you will need to obtain a wiring diagram for your vehicle, and cut the wires, then cut the wire for the mic that came with your head unit, and splice them together.

Im not sure about your vehicle, but I did it in my 2010 Ford Explorer.

I was able to find the wires for the built in mic that connected to the factory Sync, and splice it to the BT120.

your installer need to find the wire that uses that mic, on my mazda cx-9 the installer could not pin it out so he just used the supplied mic.

i just bought a 2012 sienna and saving to get the 130bt, so ill be in your boat soon.

have you find out the answer?