What's the reason for BMW X6 door lock sensor failure?

[CassidyRose]

There are only three possible reasons for the failure of the smart key. First, the car key may be out of battery, which naturally prevents the door from opening and the car from starting. Another possibility is that the car's battery is dead. If the battery is dead, the sensors in the car won't have power, so they can't detect the key. As a result, the car won't start. If neither of these is the issue, then the problem lies with the smart key or the sensor module, and you'll need to visit a 4S store for repairs. Do not leave the spare key in the car: If the primary key fails and the spare key is misplaced, you'll face high reconfiguration costs. If you only need to replace the key, you'll have to provide a series of documents and the manufacturer must supply the corresponding model parameters and password. This process is not only troublesome but also time-consuming. Do not use the wrong battery: Just like phone batteries, smart key batteries cannot be used randomly. Using the wrong battery can damage the circuit board. Most smart keys use button batteries, so simply find the same model.