chipped key analysis

mikey72

Woudn't work for me anyway, I'd be pressing the key and wouldn't know the car wasn't there until it didn't beep back at me.

Strider590

Theoretically if the key operated on a rotating code, any key press while the car was out of range would result in a mismatch between the key and the car until the car was in range again. So if the code exactly matches the car, then they could assume that it was last used with the car.

For example with a Honda if you press the button more than 200 times when out of range, the key would stop working.

Locknut

You are talking about the remote side of the key though not the transponder chip although that too is rolling code on most modern cars.