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Lexus Key Replacement – Replacing a Remote Or Fob No matter if you have a standard Lexus key that switches on the ignition or a smart key for your car that starts by pressing an arrow, eventually the battery in your fob will run out. The replacement process is simple with a paperclip: Pop the old battery out, insert the new one (refer to the owner's manual to determine which battery you need) and then secure it back into place. Keys Lexus keys aren't simple to replace and require a professional locksmith for car keys to make a functioning spare. Every Lexus key has an embedded microchip that must be programmed to work with the immobiliser system of your vehicle. This procedure takes time and requires special equipment to perform correctly, and every model has its own unique programming procedure. Replacing keys or remotes is a costly service that you should leave to professionals unless you are equipped with the right tools and expertise. You will have to replace the batteries in your smart key or standard key. Both keys function by turning the barrel of the ignition. You can save money by doing this yourself, but it requires only a small Phillips screwdriver as well as an old coin (a 20p piece is ideal) and a paperclip. You will find two or three screws on the back of the fob that holds the key. Unscrew them and store them safely (they are small and easy to lose). The fob is removed, revealing an indentation that is circular where the key's metal part will be. Remove the battery using the paperclip and insert the new battery, making sure that it's properly inserted. Clip the inside of the metal key back together. Remotes Replacing a Lexus remote or fob is a complicated process and requires skilled locksmiths equipped with the right tools and experience. Some models require the transponder in the key to be reprogrammed to work with the immobiliser systems of the car. The Lexus models use different methods to program these chips. This is done by using a specific device that transmits a code to the chip to unlock the doors or start the engine. Certain Lexus automobiles are built with a single unit that includes the key head and the remote, and these are much easier to replace because no separate chip is required. This type of key is also a bit cheaper. Regardless of the key type no matter what type of key it is, all fobs eventually run out of battery power. It can be very frustrating but with a little knowledge you can get your Lexus up and running. Check out the owner's manual to determine the type of battery you require. Then, locate an alternative. Then, find tiny holes on the inside of the fob and insert a coin (a 20p piece is ideal) and twist. TheKeyLab should reveal the flat spot, which you can employ a paperclip to take away. Then, remove the battery that was used and replace it with the new one. Make sure to insert the battery with the proper polarity. Finally, clip the inside of the fob back to its original position and insert the key back into the metal. Transponder Chips More or less all new cars since 1995 have transponder chips in the head of the key to disable the immobiliser system. If you've got a car key with a chip in it the head has a plastic cover that is able to be pulled off to reveal an L-shaped metal key. Having a replacement key or fob with transponder chips is a multi-stage procedure that includes precise cutting of replacement keys as well as programming the transponder chip in order to synch up with the vehicle's immobiliser. A transponder is a type of chip with Non-Volatile Memory. It is comprised of a set of windings that are fine wires wrapped around a tube. They look like the ones in an electric motor. These windings create 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 known as the circle + (General Motors). The first kind can be reused, but has to be unlocked using a special machine in order to work on a different vehicle compatible with it. The latter type is more difficult, as the older keys are usually damaged or drilled through, or discarded after key cases are replaced. However, they can be used with a key-service that does not require a battery. Immobiliser Systems Immobiliser systems are electronic security measures that stop thieves from starting your vehicle. It operates by sending a signal from your vehicle 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 the one of the vehicle in order for it to start. If the codes do not match, the engine will stop immediately to prevent theft. Modern smart keys and fobs have an embedded transponder chip that stores security information in a format that can't be duplicated. When your key or fob is placed in the ignition, it transmits this code to a device within the ECU. The ECU examines the code against the one stored in its memory and activates both the fuel system and the ignition circuit if they match. If the codes do not match then the engine will not start even if the ignition circuit is short-circuited by a burglar. Replacing a key or fob is a multi-stage process which involves precise cutting the new blade for the key and programming it to synch with your car's immobiliser system. There are many different immobilisers that are available in various years and models and each one requires the use of a unique programming method. We utilize Ross-Tech to ensure that the replacement key is programmed correctly. This will ensure maximum performance and security.