Help Bluetooth issue with Zenfone 4


When using this Asus Phone as handsfree in my Honda CRV the Bluetooth connects for about 10-15 seconds properly then cuts out, then reconnects, then cuts out.... I have tried killing as many services as I can find - WIFI/GPS but the problem persists.
It makes handsfree discussions almost impossible.
Does anyone have any idea how to troubleshoot further or find assistance??
Other Phones - Nexus, iPhone, Samsung all connect well and reliably to the vehicle.