The present invention provides an emission monitoring device for a vehicle. The device includes but is not limited to a lightweight housing for operationally encapsulating a processor, memory; a sensor for each vehicle component to be monitored, a display device; and a power supply for power the device. The processor is programmed to monitor each sensor, capture data from each sensor, store the captured data from each sensor in the memory; and display the captured onto the display device. In one embodiment of the present invention the housing is operationally mounted onto the inner gas lid of the vehicle. In an alternative embodiment, the housing is incorporated into the dashboard.