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How to Change a Car Key Battery Nine times out of 10 it is a dead battery that is the reason for your key fob's inability to function. Luckily replacing the battery is easy and quick. You can buy a replacement CR2032 Lithium battery at any Lexus Service Center, Walgreens or Camera Store. It's also recommended to have some spare batteries on the shelf. How do you replace a key fob's battery? A key fob, also referred as a remote control, is a small device that can be connected to or integrated into your keys to open and start your vehicle. It is powered by batteries and will eventually die. It is easy to replace the battery of a car key at home. A reduced signal strength is one of the first indications that your key fob battery is in need to be replaced. You might also notice that you must press the unlock button several times in order to get an answer from your vehicle. Your owner's manual (or the online version) will provide you with detailed instructions on how to replace the battery of your key fob. If not, you can find instructions on YouTube and at an hardware store or a battery specialist shop. The battery inside your key fob is secured by tiny screws. Locate the screw and remove it, making sure to put it away in a secure place (such as an airtight plastic bag) to avoid losing it. Use a small screwdriver to pull the case apart to reveal the battery. Some fobs come with clips to hold the battery in place; if so, gently lift these to release the battery. Replace the battery with a new one, making sure it is fitted with the positive side facing up. How do you unlock your vehicle by using a dead key fob battery We've all been there: you get to your car, click the unlock button, but nothing happens. Your key fob battery is probably dead if your car isn't opening. Thankfully, Lexus (and all other major manufacturers) have thought of this and added a mechanical emergency key in the key fob. The mechanism can be accessed by pressing or moving a small lever on the side of the fob. This will take off the cover for the key fob. This exposes a metal key that you can insert into the door lock to unlock your vehicle. The same method can be employed to roll down your windows, or to open the moonroof when the key fob is not working. You'll have to have an expert program your Lexus for this feature however once it has been activated, you can use the key fob as a button to push it to open the windows. Be aware, however, that you cannot roll up the windows or moonroof from outside the car once they are down. It is still necessary to replace the battery of your key fob frequently, so you'll also want to ensure it's fully charged and functioning properly. This means keeping it away from the cold, staying away from direct sunlight, and ensuring that it is connected to a charger at all times. How to open the Windows with a Key Fob Battery Every new model year brings new features and technology to automobiles. One of the most convenient features to be found in 2021 Lexus models is the key fob which lets drivers lock and unlock their doors, open the trunk and even start their vehicle without ever taking the key from their pockets. Did you realize that the key fob can do much more than just unlock doors? Earnhardt Lexus will show you how to use your keyfob in this blog. With the key fob, you will be able to lock and unlock your vehicle as well as lower your windows and sunroof. To do this you need to press the unlock button twice, and then hold it down after the second time. The windows and sunroof will start to lower but you can stop them at any point by pressing the unlock button twice. Some key fobs also have the capability to summon your vehicle. This feature is great for when you're trying to find parking in a crowded area or you'd like your car to pull you out of an impasse. Press the lock button twice on the key fob, and hold it after the second. The car will begin to pull out or move out of the spot and you'll be able release the lock button when you are in the location you want to. How to unlock your vehicle by touching the handles on the doors. Virtually lexus key fob comes equipped with keyless entry which lets owners unlock and lock their doors from a distance, as well as to open the trunk and start the engine. These features are useful however they can cause problems if your key fob's battery needs to be replaced or has gone out of service. It's essential to know how to replace the key fob battery, as well as other tricks to keep your Lexus running smoothly for many years. Modern Lexus models do not use traditional keys. Instead, they use Smart Access keys. This is a remote controlled in tiny pockets that fulfills the same functions like a normal key. However, just like other remote control, it can be plagued by a myriad of issues, including the inability to unlock or lock your vehicle from a distance. This can be a huge problem, particularly if you're trying to get in your vehicle after a long day at work or running for errands in Holmdel. Fortunately, there are an easy set of steps you can take to fix this problem. First, ensure your key fob isn't in close proximity to electronic devices that generate magnetic fields, like 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 show that the key fob has entered battery saving mode.