Not that I'm aware of. The device needs to detect the OK Google hot word. Perhaps a hands free application can help you. Vlingo used to be a good app, however, I no longer see it available in the Play Store. There are others that may be worth a look. I'd suggest checking for a car/driving mode and see if you can use that while connected to the vehicles Bluetooth. Let us know what you end up using.Can the nexus 5 connect to car Bluetooth via voice activation not google ok!