Why do car keys not sometimes unlock other cars?

Question

I understand that the ability to unlock or lock a car is based on the frequency of the transmission from the key, but hypothetically wouldn’t some of these eventually overlap and lead to someone being able to unlock someone else’s car?

In: 0

Answer 1

Modern keys have a specific handshake code between the car and they key that is set with each locking. So not only does it need to send the correct frequency, but it needs to send the correct code, too.