https://www.thekeylab.co.uk/bmw-car-keys/ Replacing BMW Key Fob Batteries You have pressed the BMW key fob button, but nothing happened. It is possible to replace the battery if this is the scenario. You can order an blank replacement key from an online seller. However, you will need to take the key to a locksmith or dealer to be programmed for your vehicle. You'll also require proof of ownership, such as a copy of your registration or ID. Rekeying If your BMW key fob isn't functioning properly, the first thing you need to do is get a new battery. You can purchase one at an auto dealer or a locksmith that specializes in car key services. The process can take about a week to receive the new key and then have it programmed to your car. The cost can vary based on the type of BMW and the features it comes with. Some BMWs have Comfort Access which makes use of near-field communications to unlock and begin the car. It saves the keys data in the Secure Element of your phone and enables a number of other features, such as acceleration, braking, drive position change, minimum steering correction, engine start/stop, and activating/deactivating the electromechanical parking brake. It's also safe to use because it only sends a signal when the smartphone is within close proximity of the BMW Digital Key. To activate the BMW Digital Key, you need to have a compatible iPhone with an iOS version of 9.3 or higher and a compatible Bluetooth device. This includes the Apple Watch, but it also works with Android phones that have a Bluetooth LE profile that can run iOS 9.3 or later. You can also program additional key fobs to work with your BMW by following a straightforward procedure. First, make sure that the working key is in the ignition and rapidly turns it to position 1. Remove the key, and while pressing the unlock button, press the BMW logo three times on the fob. Turn on your car, and the other BMW key fobs should now be connected to the vehicle. When you've installed a new batte