However, there are more ways than one to lock your keys inside. Most aftermarket car security systems or even some factory basedsystems have "passive arming" which will automatically rearm and lock your car after a period of time. Sometimes, your pet or child could
"accidently" lock the car while playing with the keys or door locks inside the car.
Traditionally, you would either call your friend, spouse or family to bring a spare key (assuming they are available and nearby). The other option would be to call a tow truck and have them unlock it "manually" making all kinds of holes and scratches on your car and window. Not to mention another $60 ~ $80 for their services.
The Z-PASS from Zenesis Electronics is a simple add-on module that will sit behind the front windshield of your car. You can assign your own 4-10 digit PIN CODE which you can change at any time. In the event that you lock the keys inside, you can simply "touch" your PIN code on the module from outside your front windshield.Once the last digit is accepted, you will hear two chirps from the sirenand the door will unlock automatically.