Sorry to revive an old topic. What a near colossal mistake upgrading to Bluetooth 3.32 was.
I had the exact problem as Rebelhell, and downgrading to Bluetooth 3.24 worked for me as well! Big thank you to natedog172. This has saved me from buying a replacement receiver. I'm attaching just the Bluetooth firmware (1.8 MB) so you don't need to download the entire 2.2 GB file from natedog172.
DOWNLOAD: AVIC Z140-BH Bluetooth 3.24 FIRMWARE.zip
PS - I don't understand why Pioneer would be rude about this because they include the Bluetooth 3.32 drivers with the official Firmware up
