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Lexus Key Replacement – Replacing a Remote Or FobThe battery inside your key fob is going to eventually run out, whether you own the standard Lexus Key that operates the ignition on or an intelligent key for your vehicle that can start by pressing a button. The replacement process is simple with a paperclip: Take the old battery out, insert the new one (refer to the owner’s manual to determine which battery you require) and then clip it back into place.KeysLexus keys aren’t always easy to replace. A professional locksmith is required to create a spare that works. Each Lexus key has an embedded microchip, which needs to be programmed in order to sync with the immobiliser system in your vehicle.It requires a lot time and equipment that is specially designed for this process to be done correctly. Each model has its own specific programming process. Replacing remotes or keys is a cost-effective service that should be left to professionals unless you are equipped with the right tools and expertise.If you have a traditional key that rotates in the ignition barrel or a smart key that can start the car at the touch of the button, both will eventually need their batteries replaced. It’s a simple task to do but you’ll need an inexpensive Phillips Screwdriver, 20p coins and a paperclip. You will find two or three screws on the back of the fob that holds the key. Remove them and store them safely (they are small and easy to lose). Remove the fob and you will see an indentation of circular shape for the key made from metal, take the battery out (using the paperclip) and insert the new one ensuring it is the right way up. Then, you can clip the inside of the key back together.RemotesLexus remotes and fobs aren’t easy to replace and require locksmiths who are both well-versed and have the proper tools. Certain models require the transponder on the key to be changed so that it can work with the immobiliser systems of the car. These chips are programmed by different methods depending on the model of Lexus. This is accomplished by using a special device that sends an indication to the chip that matches the code used to open the doors and start the engine.Certain Lexus vehicles are equipped with a system that combines the key head and remote. They are much easier to replace, since there is no chip that needs to be replaced. This type of key is also cheaper.Regardless of the key type, all fobs eventually run out of battery power. This can be a frustrating experience, but it’s possible to get your Lexus back on track with a little know-how. Read the owner’s guide to determine what type of battery you need. Then, locate an alternative. Find a small hole on the inside of your fob. Insert the coin (20p works well) into the hole and twist. You should see a flat area that you can take out with an ordinary paperclip.Then, take the old battery off and insert the new one. Make sure that the replacement battery is installed with the correct orientation. Finally, cut the inside of the fob back to its original position and re-insert the metal key.Transponder ChipsTransponder chips are found in the key heads of almost all new cars produced since 1995. They are used to disarm immobiliser systems. The head of a key which has a transponder chip can be removed to reveal a steel L-shaped key. A transponder-chip replacement key or fob is a multistage process. It involves cutting the keys precisely and programming the chip to communicate with the vehicle immobiliser.A transponder is an electronic chip with Non-Volatile Memory (NVM) that contains a set of windings (very fine wire that is wrapped around tubes) that resemble ones found in an electric motor. These windings create a coded message that the car is able to read. If the code is valid, then the car will allow you to start it up.There are two types of transponder chips, one known as the 80 bit, and the other is known as a circle + (General Motors). The first is reusable but needs to be unlocked by a special machine to be used in a compatible vehicle. The latter is more difficult, as the older keys are often damaged and then drilled through or thrown away when key cases are replaced. However, they can be used with a service-key which does not require a battery.Immobiliser SystemsAn immobiliser is a security measure that uses electronic technology which prevents thieves from opening your car. It operates by sending a signal from your car to the key when you attempt to start it. The electronic chip inside the key responds by sending a unique number of codes that must match that of the vehicle in order for it to start. If the codes do not match, the engine will immediately shut down to stop theft.Modern smart keys and fobs have an embedded transponder that stores electronic security information in a format that cannot be easily copied. When lexus car key The Keylab or key are inserted in the ignition, they transmit this code to the ECU. The ECU is able to compare this code with the one in its memory, and then activates the fuel system and the ignition circuit if they are compatible. If the codes do not match and the engine does not start even when the ignition circuit has been short-circuited by a thief.Replacing a fob or a key is a multi-stage procedure that involves precise cutting of the new key blade, and programming it to synch with your car’s immobiliser system. There are a variety of immobiliser systems that are used in different models and years and each one requires an individual programming procedure. We employ Ross-Tech to ensure that the replacement key is correctly programmed. This will provide you with the best performance and security.