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Lexus Key Replacement - Replacing a Remote Or FobThe battery inside your key fob will eventually wear out, regardless of whether you have the standard Lexus Key that switches the ignition on or an intelligent one for your vehicle that starts by pressing a button. It's easy to replace it with the help of a paperclip. Simply remove the battery that was in use, and then insert the new one (refer to the owner's manual for the type of battery that you need) and then secure it back into the appropriate spot.KeysLexus keys are not simple to replace and require a professional locksmith for car keys to make a working spare. Every Lexus key comes with a microchip that needs to be programmed to sync with the immobiliser system of your vehicle.G28CarKeys takes time and special equipment to do properly, and each model has its own unique procedure for programming. Replacing a key or remote fob is a cost-effective service and one you should leave to professionals unless your have the proper tools and knowledge.You'll need to replace the batteries in your smart key or traditional key. Both keys function by turning the barrel of the ignition. You can save money by doing it yourself, but it will require only a small Phillips screwdriver as well as coins (a 20p piece works best) and a paperclip. On the back of the fob you will see either two or one screw take them off and place them in a secure place (they're tiny and easy to lose). Remove the fob and you will see an indentation of circular shape for the key made of metal. Pop the battery out (using the paperclip) and then insert the new one, making sure it's facing the right way up. Then, clip the inside of the key back to the fob.RemotesReplacing a Lexus remote or fob can be difficult and requires skilled locksmiths who have the right tools and knowledge. Certain models require that the chip inside the key be reprogrammed to function with the immobiliser system of the car. These chips are programmed using different methods based on the model of Lexus. This is accomplished by using a special device that transmits a specific code to the chip to unlock the doors or start the engine.Certain Lexus cars are constructed with a single piece of hardware which includes the key head and remote, and these are much easier to replace because no separate chip is required. This type of key is also a bit less expensive.All fobs eventually lose their battery power, no matter the type of key. It can be frustrating however with a little know-how you can get your Lexus up and running again. Consult the owner's guide to determine which type of battery you require. Then, search for the replacement. Find a small hole on the inside of the fob. Insert the coin (20p works well) into the hole and then twist. There should be an open area that you can get rid of using an ordinary paperclip.Then, pull the old battery off and insert the new one. Make sure you insert the battery using the correct orientation. Then, clip the outside of the fob back to its original position and reconnect the key to the metal.Transponder ChipsNearly all new cars built since 1995 have transponder chips inside the key head that allow it to deactivate the immobiliser system. The head of a key which is equipped with a transponder chip may be removed to reveal a metallic L-shaped key. The process of getting a replacement key fob made with transponder chips is a multi-stage process which includes precise cutting of replacement keys and programming of the transponder chip to synch up with the vehicle's immobiliser system.A transponder is an electronic device with Non-Volatile Memory (NVM) which contains a set of windings (very fine wire that is wrapped around tubes) that resemble ones in an electric motor. These windings create a coded message that the car will read. If the code is correct it will allow the car to start.There are two kinds of transponder chips. The one is known as the 80-bit and the other is called the circle + (General Motors). The first type is reusable, however it needs to be unlocked using a special machine to function on another compatible vehicle. The second one is more difficult to use as the old ones can be broken, drilled or thrown out when key cases are changed. They can be salvaged however and used with an ad-hoc key that does not require a battery to function.Immobiliser SystemsImmobiliser systems are electronic security measures that prevent thieves from starting up your vehicle. It operates by sending a signal from the vehicle to the key whenever you attempt to start it. The electronic chip in your key responds with an individual code that must match the one found in the vehicle in order to start. If the codes do not match, your engine will shut off immediately to stop theft.Modern smart keys and fobs come with an embedded transponder that stores electronic security information in a format that can't be copied easily. When the fob or key are inserted into the ignition, they transmit this code to the ECU. The ECU examines the code against the one it has stored in its memory, and activates both the fuel system and the ignition circuit if they are compatible. If the codes do not match, your engine won't be able to start - even if someone tries to short-circuit the ignition circuit.The process of replacing a key or fob involves an entire process that involves cutting the new blade with precision and programming it so that it can be synced with your car's security system. Each immobiliser is unique and has its own programming procedure. We utilize Ross-Tech software to ensure that your replacement key is programmed correctly to ensure optimal performance and security.