What are the reasons why the BMW e60 key cannot sense the car lock?

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The reasons why the BMW e60 key cannot sense the car lock are as follows: Damaged smart box sensor: If it is a new car, this problem is unlikely, but it cannot be ruled out. If the smart box sensor is indeed damaged, you can complain to the place where you bought the car and ask the staff to replace it with a new smart box sensor. Weak battery power: If the battery is weak, pressing the remote control indicator light will still flash normally. You can use a multimeter to measure the battery voltage. If the voltage is lower than 2.5 volts, the remote control will fail to recognize the signal. Replacing it with a new one can solve the problem. Remote control code loss: This may be caused by pressing the remote control multiple times from a long distance, triggering the system's anti-theft protection mechanism; or the remote control being underpowered for a long time, which is also a factor leading to the remote key code loss.