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How to Change a Car Key Battery Nine times out of 10 the battery is dead and the cause of your key fob not functioning. Fortunately replacing the battery is simple and fast. You can purchase a replacement CR2032 Lithium battery at any Lexus Service Center, Walgreens or Camera Store. You should also keep several batteries in your possession. How to replace a Key Fob Battery A key fob is a remote control device that can be attached to your keys, or integrated into the key itself. It allows you to unlock and start your vehicle. It is powered by an internal battery and will eventually run out. It is easy to replace a car key's battery at home. One of the first signs that your key fob requires replacement batteries is reduced signal strength. You may also notice that you have to press the unlock button several times to receive a response from your car. The owner's manual (or the online version) should provide specific instructions on how to replace a key fob battery. If not, you can get instructions on YouTube and at an hardware store or a battery specialist shop. The battery inside your key fob is secured by small screws. Find the screw and remove it, making sure to put it away in a secure place (such as a resealable plastic bag) to avoid losing it. Then, use a small screwdriver to pry open the case in which the battery is. If the battery is secured by clips, gently lift them to let the battery go. Replace the battery with the new one. Make sure that the positive side is facing up. How to Unlock Your Vehicle with a Dead Key Fob Battery You approach your car and push the unlock button. Nothing happens. The car simply won't open, and the battery for your key fob has probably died. Fortunately, Lexus (and all other major manufacturers) have thought of this and put a safety key inside the key fob. The mechanism can be accessed by pressing or sliding a small button on the inside of the fob. It will then remove the key fob cover. The cover will reveal a steel emergency key that you can place into the door lock by hand, which will then unlock your vehicle. The same method can be used to roll down your windows or open the moonroof when the key fob is not working. You'll need an expert program your Lexus to enable this feature after which, once it's been enabled, you can use the key fob as a button and push it to open the windows. It isn't possible to raise the windows or the moonroof until they're rolled down. Be aware that the key fob is still going to need its regular battery replacement, and you'll want to ensure that you keep it running and charged efficiently. This means keeping it out of the cold, staying away from direct sunlight, and ensuring it's connected to a charger at all times. How do you roll down the windows with the key fob battery Every year, with each new model, cars are gaining more advanced features. One of the most useful features of 2021 Lexus models is the key fob, that allows drivers to lock and unlock their doors, open their trunks, and start their car without ever having to take the key out of their pockets. But did you realize that your key fob comes with a lot more tricks up its sleeve? Earnhardt Lexus will show you how to use your key fob in this blog. In addition to locking and unlocking your vehicle You can also open your windows and sunroof by using the key fob. Press the unlock button twice, and then hold it after the second press. G28CarKeys can stop the sunroof and windows from rolling down by pressing the unlocking button again. Certain key fobs can also be used to summon your car. This feature is very useful when you are trying to find a parking spot in a crowded area or if your car needs to get you out of an difficult situation. To activate this feature, press the lock button on the fob of your key twice and then hold it in place after the second press. The car will begin to pull or back out of the spot and you'll be able unlock the lock when it's at the desired location. How to unlock your car by pressing the door handles Nearly all new vehicles are equipped with keyless entry which allows owners to open and lock their doors from a distance, as well as to open the trunk and start the engine. While these features are extremely convenient, they can also cause issues if the key fob battery has gone out or needs a replacement. This is why it's vital to know how to replace the battery of a key fob as well as the other methods that will help you keep your Lexus running at its best for the years to be! Modern Lexus models do not utilize traditional keys. Instead, they utilize Smart Access keys. This is a remote that fits into small pockets that fulfills the same functions like a normal key. It can cause a variety of issues, like the inability to lock or unlock your vehicle remotely. This could be a major inconvenience, especially during a long working day or running out of Holmdel. Fortunately, there are a few easy steps you can take to address this issue. First, ensure your key fob doesn't sit in close proximity to electronic devices that create magnetic fields, such as cell phones, laptops, and table lamps. By pressing the lock and unlock buttons simultaneously on your key fob will activate the battery saving mode. This will cause the indicator to flash four times to indicate the key fob is in the battery-saving mode.