How to change the BMW car key

Let ’s introduce how to change the battery of the BMW model key and its illustration:

Before replacing, it is best to know the model of your car key battery. This is usually written in the vehicle user manual, and then the new key battery is selected according to the specified model.

Remove the hidden mechanical key from the remote control, as shown in the figure, and press the switch of the mark 1 to remove the mechanical key.

With the mechanical key just taken out, insert it into the marked position, and then use the lift bar movement to lift the key housing.

After removing the key case, you can see that the battery is in a deeper position. Take any thing and go in through the gap on both sides, and gently pry out the old battery.

After replacing the new battery, pay attention that the positive and negative electrodes of the battery cannot be reversed. The next step is the installation procedure. Finally, don't forget to put the mechanical key back.

It can be seen that replacing the battery is very simple. There is no difficulty to say that almost everyone can complete it. The car key battery is a button battery. It is bought in ordinary large and medium-sized supermarkets, so there is no need to go to a 4s store to replace it. Time will cost several times more money.
In daily use, some of our actions can easily damage the car key, that is, falling from height. It is estimated that many car owners have tried to use the key as a toy for children, but the child is not sensible and throws it around. Because the internal resistance of the key is relatively weak, it is easy to be damaged in severe collisions. There is also a case where the key enters the water. If the water penetrates the internal burning circuit, it will also cause the remote control to fail.
So if you encounter water from the remote control key, don't hold the key and shake it hard, and don't press the key above. This will make it easy for the water to seep into other important lines, and do not use the remote control to unlock immediately, because this may cause the circuit The board burned out. The correct way is to open the car key case flat and blow dry with a hair dryer before checking.