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How to Change a Car Key Battery Nine times out of ten the battery is dead and the cause of your key fob's inability to function. It's easy to replace the battery. You can locate the 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 that allows you to unlock and start your vehicle. It is powered by a battery and will eventually die. Fortunately, replacing a car key battery is an easy job that can be completed at home. One of the first indications that your key fob needs an upgrade is a lower signal strength. It is also possible to notice that it takes several presses on the unlock button to trigger an answer. The owner's manual (or the corresponding online version) will have specific instructions on how you can replace a key fob's battery. If it doesn't, you can obtain instructions from YouTube or a battery specialist shop. A small screw is what holds the battery in your key fob. Find the screw and remove it, but be sure to put it away in a secure area (such as an resealable plastic bag) to ensure that you don't lose it. Then take a small screwdriver to pry open the case where the battery is located. Some fobs are fitted with clips that hold the battery in place. If they do you can gently lift them to let the battery go. Replace the battery with a new one. Make sure that the positive side is facing upwards. How to unlock your vehicle by using a dead key fob Battery You approach your car and you press the unlock button. Nothing happens. The battery on your key fob probably dead if the vehicle isn't able to open. Fortunately, Lexus (and all other major manufacturers) have taken this into account and added a mechanical emergency key inside the key fob. The mechanism is accessible by pressing or sliding a small button on the back of the fob. This will take off the cover on the key fob. This exposes a metal emergency key that you can insert into the door lock manually which will allow you to unlock your vehicle. If the key fob stops working but you're still able to use this method to open the window or moonroof. Once the technician has programmed your Lexus and you have it programmed, you can use the fob to lower windows. It isn't possible to raise the windows or the moonroof after they're rolled down. Be aware that the key fob will continue to need its regular battery replacement, and you'll want to ensure that you keep it fully charged and operating effectively. Keep it away from the cold and direct sunlight. Also, keep it constantly charged. How do you roll down the Windows using a Key Fob Battery With each new model year, cars are gaining more advanced features. One of the most convenient features that will be available in 2021 Lexus models is the key fob which lets drivers lock and unlock their doors, open their trunk and start their car without ever taking the key from their pocket. Did lexus keys think that your key fob can do a lot more than just unlock doors? In this blog post, Earnhardt Lexus will show you some of the coolest and most innovative ways to use your key fob. With the key fob, you are able to lock and unlock your car as well as roll down your windows and sunroof. Press the unlock button twice, and keep it in place after the second press. You can stop the windows and sunroof from sliding down by pressing the unlock button a second time. Some key fobs also have the capacity to summon your car. This feature can be useful if you need to locate a parking spot in a busy area or if your car is required to help you out of an awkward situation. To activate this feature, simply press the lock button on the fob's keychain twice and hold it down after the second time. The car will start to move out of the area and you can let go of the lock button when you are in the location you want to. How to unlock your vehicle by pressing the handles on the doors. Almost all new vehicles have keyless entry. This allows the owner to lock and unlock doors and also start the engine and open the trunk from the distance. While these features are incredibly convenient, they can also cause issues if the key fob's battery is depleted or needs to be replaced. It's crucial to know how to replace the battery on the key fob, and other tricks to keep your Lexus running efficiently for a long time. Modern keys are not like traditional keys. Lexus models utilize a Smart Access key, which is essentially a pocket-sized control that performs all of the similar functions of a regular key. However, just like any other remote control, it may suffer from a range of issues, including the inability to unlock or lock your vehicle from a distance. This can be a major hassle, especially after a long day of work or running errands in Holmdel. There are a few easy steps you can follow to fix the issue. First, ensure that your key fob doesn't sit in close proximity to electronic devices that generate magnetic fields like cellphones, laptops, and table lamps. You can also turn on battery saving mode by pressing the lock button and unlock button simultaneously on your key fob. The indicator will flash four times to show that the keyfob is in battery saving mode.