There are millions of combinations in this system that will not use the same code twice in a row. This eliminates the risk of code being detected by thieves with a code copier, also called a “grabber”, a risk that exists in the case of cars using a fixed code radio remote control. 

Careful! It is very important to allocate a few seconds each time you get out of the car, especially if you do not leave a door or a window open. Many cars are equipped with the lock function after a certain time. I don’t think it’s nice for anyone to be hundreds of miles away from home and not be able to open the car. 

Also, to prevent this negative event, it is advisable not to hold the remote control (key) in an area with an electromagnetic field source. This can be decalibrated, disturbing the frequencies between the receiver and the transmitter.