Fixd is an amazing device that sends you a smartphone notification if it detects any problem with your car, while also alerting you to potential consequences and costs.
The contraption consists of a vehicle sensor and companion app. The sensor plugs into the car's On Board Diagnostics-II (OBD-II) port, a computer-based system mandatory in all cars built in the US after 1996.
Once the sensor is installed and the user has the app running, Fixd can monitor vehicle diagnostics and provide information on potential problems. Issues that could be flagged by the device include airbag malfunctions or O2 sensor failures. For example, if the O2 sensor malfunctions, Fixd will notify the user of the possibility of increased emissions and reduced miles per gallon.