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How to Replace a Dead BMW Key Fob Most BMW owner will need to replace their key fob's battery at some point. Luckily, this is simple to do and won't cost you a fortune. The key fob is powered by an ordinary CR2032 battery that can be replaced at a hardware store, online, or even the local BMW dealership. Replacement Battery A dead key fob is more than a pain to deal with, it can also be dangerous. You don't want to walk into your vehicle, press the unlock button, only to you find that there is no response. This usually means that the battery in your BMW key fob has gone out of service. Fortunately, this is a simple issue to fix at home with the replacement battery. First, you need to determine which type of battery is needed for your BMW key fob – the sleek slant or Comfort Access keys or a Smart Key CR2450. These batteries can be found in hardware and auto parts shops for less than $5 each. Once you have the correct type of battery, all that is left to do is swap out the old battery with the new one. Once you've inserted the new battery, make sure to shut both halves of the key fob securely. Before you begin taking the key blade from your BMW key fob, and then make use of a valet key or small screwdrivers to open it up and reveal the tiny access port in the back of the fob. Then, you can remove the back of the key fob to replace the battery that has died. Be careful not to break the plastic around the key fob when you remove it. Wrapping a small piece of tape over the top of your tool will protect against scratches. After replacing the battery you should reassemble and test your BMW key fob. If your door locks and opens the car, you've successfully reset your BMW key fob! If not, you'll have to refer to the owner's manual or go to an expert for assistance. Key Blade There are many locations to purchase replacement BMW keys in case you've lost your key fob or simply need to replace your battery. Some online stores offer discounts and free shipping, making them a great option for those who are on a tight budget. It is important to keep in mind that these prices do not include the cost to program the new key into your vehicle. Some BMW models are equipped with a “proximity key,” which allows you to start or unlock the car at the push of a button. Some models have a key made of metal in the remote which needs to be put into the ignition to start the engine. The replacement process is almost identical for both types of BMW keys. If the battery inside your BMW key fob is dead and you lose it, you won't be able unlock your vehicle or use Comfort Access if it is equipped. It's easy to replace the battery with a few simple instructions. Ensure that the doors and windows of your vehicle are closed. Then, locate the locks and unlock buttons on your working BMW key fob. Press and hold the unlock button until the electronic inside the key fob come on, but the engine remains off. Insert the new battery in the key fob, and sync the key within 30 seconds of syncing the original key. Many of today's cars such as BMWs, are equipped with Smart Keys that can unlock and start the vehicle without using a traditional key. These keys come with a built-in transponder, which sends a distinct signal to the car's immobilizer, which stops unauthorised key-cloning and even starting. These keys are more expensive than standard key fobs, as they require additional technology and programming. Certain BMW models also come with a special feature called Summon, which allows you to press a button on the key fob and then get your car to come and take you away from an area of parking or garage. Although this feature isn't available in all models, it's a great feature that can save you from needing to summon a taxi, or fight off a creeper while trying to get your car back. Start/Stop Button A new BMW key comes with a built-in push button which can start your car for you. This is a great way to save some time and not have to get out of the car to access your keychain. The starter/stop button is not simple to use on the BMW key fob replacement. The first step is to make sure the key fob is properly associated with your car. This can be done by following the steps in this guide. Once you have the correct key fob in your possession, it is time to program it to your BMW. The procedure will differ slightly according to the type of key you have. Some modern models come with an electronic key fob that can be programmed following the directions in this guide. Older BMW models might need to be brought to our dealer to be programmed with the key fob. The process will begin by checking that the new key fob is working key blade. Test it by putting the key fob into the keyhole pressing the lock/unlock button. If it works, the BMW iDrive system will ask you to put a name on the key. Then, you can press the Start/Stop button to activate your car. Next, you will need to set up an appointment with Patrick BMW to have the new key fob programmed. We will need a valid driver's licence to verify your identity and an official copy of your vehicle's registration. This will help us identify the correct code for the key fob. You'll either have a key fob standard that does not require programming or a key fob smart with a transponder built in that requires more advanced technology. Once the key fob is programmed and you are able to use it on your daily commute in Decatur. If you have lost your key fob you can also contact our dealer for a service which will disable the key fob in the system and prevent it from being used to unlock or start your car. This is a great option to prevent theft if you are concerned that your keys will fall into the wrong hands. Programming You may need to re-programme your replacement BMW keyfob if it has an upgraded battery, but isn't working properly. The service team at our dealership in San Diego can help walk you through the steps to do so. Start by inserting the working key into the ignition, moving it to position one, then back to zero quickly five times. Then, take the key from the ignition and press the unlock button (the BMW logo) on the new key. Within 30 seconds you can press the BMW logo three times. Release the unlock button and you will hear the doors lock, and unlock instantly. The process of programming the replacement BMW key fob is the same for other BMW models, and should be completed in less than 30 seconds. After you've completed the process you are able to start your car using the new key. It is essential to replace the BMW key battery regularly. You should replace your BMW key battery every month, at a minimum and based on the way you live. bmw key replacement G28 Car Keys Solutions and easy to change the key battery. The BMW key battery is available in a standard size and can be found at most hardware stores, or even in the parts department at local dealerships. The ownership of a BMW vehicle is a sign of status and it's like you've arrived travel through the streets of Longmont in your BMW. BMW owners need to be aware that their luxury vehicle can break down like any other. It's best to learn how to program the BMW remote control before you actually need it. Our service department in Princeton can show you two methods to reprogram your BMW X3. The first is if you already have a key working and you want to add a new one, and the second is when you are beginning from scratch and don't have any keys.