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Lexus Key Replacement – Replacing a Remote Or Fob No matter if you have a standard Lexus key that is used to turn on the ignition, or a smart key for your car that begins with the push of an arrow, eventually the battery inside your key will go out. It's easy to replace it with using a paperclip. Pop the old battery out and replace it with the new one (refer to the owner's manual to see which type of battery you need) and then clip it back into the correct position. Keys Lexus keys can be difficult to replace. A professional locksmith is required to design an alternative that functions. Each Lexus key is equipped with a microchip which must be programmed to communicate with the immobiliser system in your vehicle. This process takes time and special equipment to do properly, and each model has a distinct programming procedure. Replacing keys or remotes is a pricey task that should be left to professionals, unless equipped with the right tools and know-how. You will need to replace the batteries in your smart key or traditional key. Both keys operate by turning the barrel of the ignition. It's easy to do it yourself, but you will need the smallest Phillips Screwdriver, a 20p coin and paperclip. On the back of the fob you will find one or two screws remove them and place them in a secure place (they're tiny and easy to lose). Remove the fob, which will reveal a circular indentation where the metal key will be. Remove the battery by using a paperclip. Then, insert the new battery, ensuring that it's placed correctly. Clip the the key back together. Remotes Lexus remotes and fobs aren't easy to replace and require locksmiths who are knowledgeable and have the right tools. Some models require that the transponder chip in the key be programmed in order to work with the car's immobiliser system. The Lexus models employ different methods to program these chips. This is done using a special device that transmits a code to the chip to unlock the doors or to start the engine. Some Lexus automobiles are built with a single unit that incorporates the key head as well as the remote. They are much easier to replace because there is no separate chip. This type of key is also a bit less expensive. All fobs eventually lose their battery power, no matter the kind of key. This could be a difficult situation, but it's possible to get your Lexus back on track with a little knowledge. Check out the owner's manual to determine which battery type you need. Then, find an alternative. Find a small hole on the inside of the fob. Insert program lexus key of money (20p is a good choice) into the hole and then twist. You should see an open area that you can remove with an ordinary paperclip. Then, pull the old battery away and then insert the new one. Make sure the new battery is inserted with the proper direction of operation. Finally, you can clip the inside of the fob back to its original position and replace the key with the metal. Transponder Chips Transponder chips are found in the head of the key on almost all new cars built since 1995. They are used to disable immobiliser systems. If you've got a key with a chip in it the head has a plastic cover which can be pulled off to reveal an L-shaped key. A transponder-chip replacement key or fob is a multi-stage procedure. It involves cutting the keys accurately and programming the chip to make it sync with the vehicle immobiliser. Transponders are electronic chip with Non-Volatile Memory (NVM) which contains a set of windings (very fine wire wrapped around a tube) that resemble ones in an electric motor. The windings are coded to create a signal for the car to read. If the code is correct it will allow the car to start. There are two types of transponder chip. The one is known as the 80-bit and the other is called the circle + (General Motors). The former type is reusable but it needs to be unlocked by a machine that is specially designed to function in a compatible vehicle. The latter one is more difficult since the earlier ones are often broken and drilled or discarded after key cases are replaced. However they can be used with a key-service that does not require a battery. Immobiliser Systems An immobiliser system is an electronic security feature that stops thieves from starting your car. It operates by sending an electronic signal from the vehicle to the key every time you attempt to start it. The electronic chip inside the key responds by sending a unique number of codes that must match the one of the vehicle to allow it to start. If the codes do not match, the engine will shut down immediately and prevent theft of your vehicle. Modern smart keys and fobs are equipped with an embedded transponder that can store electronic security information in a format that cannot be easily copied. When your fob or key is inserted into the ignition, it transmits the code to a receiver within the ECU. The ECU then compares it with the code that is stored in its memory. It then activates the ignition system and fuel circuit if the two coincide. If the codes do not match then the engine will not start even when the ignition circuit is short-circuited by a thief. Replacing a fob or key is a multi-stage process that involves accurate cutting of the new key blade and programming it to connect with the immobiliser system of your vehicle. There are a variety of immobilisers used in different models and years and each needs its own distinct programming process. We use Ross-Tech to ensure that the replacement key is programmed correctly. This will ensure the highest level of performance and security.