What Are the Reasons Why a BMW Cannot Be Locked?
2 Answers
BMW cannot be locked due to reasons such as aging remote transmitters, magnetic field interference, or door jammers. The following situations may cause this: Aging Remote Transmitter: If you are using a remote key to lock the door, it is likely that the remote lock is malfunctioning or the antenna of the car's remote transmitter is aging, causing the remote key to fail. In this case, you can use the spare mechanical key to lock the car. Magnetic Field Interference: Another situation is strong magnetic field interference around the car. Since smart keys use low-intensity radio waves, they cannot function properly under magnetic interference. Door Jammer: If the car frequently fails to lock remotely in a certain location, the owner should be wary of a door jammer. Some criminals use a radio signal blocker that emits electromagnetic waves of the same frequency as the locking signal, thereby blocking the electronic code of the car's central lock and temporarily disabling it.
I've driven BMWs for many years and often encountered issues with the locking system failing. The most common problem is the remote key battery running out—simply replacing it with a new one does the trick. Another issue is when the doors aren’t closed properly, especially if the trunk or hood is left slightly ajar, which causes the system to refuse to lock. Environmental interference is also annoying, such as strong signal sources in parking lots, requiring you to get closer to the car to press the key or manually lock it. If the anti-theft system malfunctions, a reset code or a visit to the dealership for repairs is needed—never delay, as it poses a high security risk. I’ve developed a habit of checking the electronic system weekly, confirming all closure points before locking, and updating the software regularly, which saves a lot of hassle. These small actions are simple yet effective—prevention is always better than repair.
