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Lexus Key Replacement – Replacing a Remote Or Fob Whether you have a conventional Lexus key that switches on the ignition, or a smart key for your car that activates with the push of one button, eventually the battery inside your fob will run out. It is easy to replace it with the use of a paperclip. Simply remove the old battery, insert the new battery (refer to the owner's manual for the type of battery you need) Then, clip it back in its place. Keys Lexus keys aren't easy to replace. A professional locksmith is needed to make a spare that works. This is because every Lexus key is equipped with microchips that need to be programmed to sync with your vehicle's immobiliser If it is not, the car will not be able to start. It takes a lot of time and specialized equipment for this process to be done correctly. Each model comes with its own set of programming procedures. Replacing a remote or key fob is an expensive service and one you should leave to professionals unless you possess the proper tools and knowledge. You'll need to replace the batteries in your smart key or traditional key. Both keys work by turning the barrel of the ignition. You can save money by doing this yourself, but you'll need an inexpensive Phillips screwdriver, the coin (a 20p piece works best) and a paperclip. On the front of the fob, you will see two or three screws loosen them and place them in a safe place (they're small and can be lost). Take the fob off, revealing a circular indentation where the metal key will be. The battery can be removed using the paperclip and insert the new battery, ensuring that it's inserted correctly. Then clip the inside of the key back together. Remotes Lexus remotes and fobs aren't easy to replace and require locksmiths who are well-versed and have the proper tools. Certain models require the transponder in the key to be programmed so that it can work with the immobiliser system in the car. The Lexus models use different methods to program these chips. This is done using a special device that transmits a specific code to the chip to unlock the doors or start the engine. Some Lexus cars are equipped with a single piece of hardware that includes the key head and the remote, and these are easier to replace since no separate chip is required. This kind of key may also be a bit cheaper. All fobs eventually lose battery power, no matter the type of key. It can be very frustrating however with a little know-how you can get your Lexus up and running. Check out the owner's manual to determine which battery type you need. Then, search for a replacement. Find an opening inside of the fob. insert coins (a 20p piece works best) and twist. The fob should be revealed as a flat area that you can use a paper clip to take away. Then, take the old battery off and insert the new one. Make sure that the new battery is inserted in the correct direction of operation. Finally, cut the inside of the fob back to its original position and re-insert the metal key. Transponder Chips Transponder chips are present in the head of the key on almost all new cars produced since 1995. They are used to disarm immobiliser systems. The head of a key that has a transponder chip can be removed to reveal a metal L-shaped key. G28CarKeys of getting a replacement key fob made of a transponder chip is a multi-stage process which includes precise cutting of key replacements and programming the transponder chip to link up with the vehicle's immobiliser. A transponder is a type of chip with Non-Volatile Memory. It contains a set windings that are fine wires wrapped around the tube. They look similar to those in an electric motor. The windings generate a coded message that the car will read. If the code is correct the car will begin to move. 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 however it must be unlocked by a special machine to be used in a compatible vehicle. The second type is more difficult to use since the old ones can be broken, drilled, or toss out when keycases are changed. They can be salvaged, however, to use with an ad-hoc key that doesn't need a battery to function. Immobiliser Systems Immobiliser systems are electronic security measures that prevent thieves from starting up your vehicle. It works by sending an electronic signal from the vehicle to the key every time you try to start it. The electronic chip in the key responds by sending a unique code that must match the one of the vehicle in order for it to start. If the codes do not match, the engine will shut off immediately to stop theft. Modern smart keys and fobs have an embedded transponder chip that stores security information in a format that cannot be duplicated. When the key or fob is inserted into the ignition, they transmit this code to the ECU. The ECU will then check it against the code in its memory and activates the ignition and fuel system circuit if the two coincide. If the codes don't match, your engine will not start, even if a thief tries to short-circuit the ignition circuit. The procedure of replacing the fob or key requires a multi-stage process that includes cutting the new blade accurately and programming it to ensure that it can be synced with the car's system. There are a variety of immobiliser systems used in different models and years, and each requires its own unique programming procedure. We employ Ross-Tech to ensure that the replacement key is correctly programmed. This will give you the highest level of performance and security.