A push button start key fob is a button that allows drivers to start their engine by pressing it. That said, you won't be able to turn on your car if you don't apply your vehicle's brakes.

Place the key fob directly on or near the sensor. Even without power, the fob can still be detected using passive RFID technology. Press the brake (or clutch) and push the start button.

The keyless car is a marvel of engineering. But how is it that they can start even when the battery in your key fob goes dead? The answer lies in science.

Push-button ignitions work via the fob, also known as a "smart key," which allows a driver to keep the device in a pocket, purse or other place when unlocking, locking and starting the vehicle.

Cars have 'secret button' that starts engine even if your key fob dies Around 60 per-cent of drivers with push-button start systems had no idea their car had a hidden emergency start feature.