It changes the fuel pump symbol from white to orange, it will say low fuel on the center of the gauge cluster, and it will pop up a temporary banner on the multimedia screen saying fuel is low. Also, zero miles range seems to be something more like 20-40 miles in reality.I can’t find a light, only a pop up that reads Low Fuel on the dashboard. Unfortunately this doesn’t happen for me until 10-14 miles left and there’s no auditory alarm. So…..if I’m on the phone and hopping on the highway, not looking at my dashboard for 20 min, a lot can change. Just gotta reprogram my brain to check gas level literally every time I get in the car now cuz it drains so quickly with such a small tank and only 13-14 mpg. Not impressed.