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Lexus Key Replacement – Replacing a Remote Or Fob If you have a traditional Lexus key that turns on the ignition, or a smart key for your car, which starts with the press of an arrow, eventually the battery in your fob will die. It's easy to replace it with a paperclip: Pop the existing battery out and then insert the new one (refer to the owner's manual to determine which battery you need) and then clip it back in place. Keys Lexus keys aren't always easy to replace. A specialist locksmith is required to design an alternative that functions. Every Lexus key has an embedded microchip, which needs to be programmed to communicate with the immobiliser system of your vehicle. It requires a lot of time and specialized equipment for this process to be carried out correctly. Each model has its own procedure for programming. Replacing remotes or keys is a costly task that should be left to professionals unless you are equipped with the right equipment and know-how. If you have a traditional key that turns on the ignition barrel, or a smart key that will start your car at the click of a button Both will eventually require their batteries replaced. It's a simple task to do however, you'll require an inexpensive Phillips Screwdriver, a coin worth 20p and paperclip. On the side of the fob you will see either two or more screws remove them and place them in a safe location (they're small and easily lost). Take the fob off, revealing an indentation with a circular pattern where the metal key will be. The battery can be removed with the help of a paperclip. Insert the new battery, making sure that it's properly inserted. Clip the inside of the key to secure it. Remotes Lexus remotes and fobs can be difficult to replace and require locksmiths who are experienced and possess the proper tools. Some models require that the transponder chip contained in the key be changed to function with the immobiliser system of the car. The Lexus models use different methods to program these chips. This is done using an electronic device that transmits an electronic signal to the chip that matches the code used to open the doors and start the engine. Some Lexus cars are equipped with a single unit that incorporates the key head and remote, and these are easier to replace since there is no separate chip. This kind of key is also less expensive. All fobs eventually lose battery power, regardless of the type of key. This could be a difficult experience, but it's possible to get your Lexus back on track with a little know-how. Refer to the owner's manual to determine which battery type you require. Find the replacement. Find a small hole in the inside of the fob and insert a coin (a 20p piece is ideal) and twist. You will see an area flat that you can take out with the help of a paperclip. Then, take the old battery out and replace the new one. Make sure that the replacement battery is in the proper orientation. Clip the inside of the fob together, then insert the key in the metal. Transponder Chips More or less all new cars built since 1995 have transponder chips embedded in the key head to disarm the immobiliser system. If you've got keys that has a chip inside it, the head is covered with a plastic cover that is able to be pulled off to reveal an L-shaped key. The process of getting a replacement key fob made of transponder chips is a multi-stage process that includes precise cutting of the replacement keys and programming of the transponder chip so that it can synch up with the vehicle's immobiliser. A transponder is a type of chip that has Non-Volatile Memory. It has a set of windings, which are fine wires coiled around the tube. They look like the ones in an electric motor. lexus key replacement The Key Lab form a coded signal for the car to read. If the code is valid, then the car will allow you to start it. There are two kinds of transponder chip, one called the 80 bit and the other one is called a circle + (General Motors). The first kind is reusable, but it must be unlocked with a special machine in order to work on another compatible vehicle. The second kind is more difficult to use since the older ones could be damaged, drilled or taken away when key cases are changed. They can be salvaged however for use with the service key, which doesn't require a battery in order to function. Immobiliser Systems Immobiliser systems are electronic security measures that stop thieves from starting your car. It works by sending an electronic signal from the car to the key every time you try to start it. The electronic chip inside the key responds with an individual code that must match that in the vehicle to start. If the codes do not coincide, your engine will stop immediately to prevent theft. Modern smart keys and fobs have an embedded transponder that can store electronic security information in a format that cannot be easily copied. When the fob or key are placed in the ignition, they transmit this code to the ECU. The ECU is able to compare this code with the one that is stored in its memory, and then activates both the fuel system as well as the ignition circuit if they match. If the codes don't match, your engine will not start – even if someone tries to short-circuit the ignition circuit. The replacement of keys or fobs involves a multi-stage procedure that includes cutting the new key blade precisely and programming it to ensure that it is compatible with your car's system. Every immobiliser system is unique and has its own programming procedure. We utilize Ross-Tech to ensure that the replacement key is correctly programmed. This will ensure maximum performance and security.