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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 a button, in time the battery in your fob will die. Replacing it is easy with using a paperclip. Pop the battery that is in use and insert the new one (refer to your owner's manual to determine the type of battery you need), and clip it back into place. Keys Lexus keys aren't always easy to replace. A specialist locksmith is required to design a spare that works. Each Lexus key has an embedded microchip, which needs to be programmed to work with the immobiliser system of your vehicle. The process takes time and specialized equipment to complete properly, and each model has a distinct programing procedure. Replacing keys or remotes is a costly task that should be left to professionals, unless equipped with the proper tools and knowledge. Whether you have a conventional key that is turned on in the ignition barrel, or a smart key that starts the car at the touch of one button Both will eventually require their batteries replaced. It's a simple task to do however you'll need an inexpensive Phillips Screwdriver, a coin worth 20p and paperclip. On the back of the fob you will see either two or more screws, unscrew them and put them in a secure place (they're small and easy to lose). Take the fob off, revealing an indentation that is circular where the key's metal surface will be. The battery can be removed using the paperclip and insert the new battery, making sure that it's placed correctly. Then clip the inside of the key back to the fob. Remotes Replacing a Lexus remote or fob is complicated and requires skilled locksmiths who have the right tools as well as knowledge. Some models require that the chip inside the key be programmed in order to work with the immobiliser of the car. The Lexus models use different methods to program these chips. This is accomplished using a specific device that sends a code chip to unlock the doors or to start the engine. Some Lexus cars are constructed with a single unit that incorporates the key head and remote. They are more simple to replace since there is no separate chip. This type of key is also cheaper. All fobs eventually lose their battery power, regardless of the type of key. It can be very frustrating but with a little know-how you can get your Lexus back to normal. The first step is to consult the owner's guide to determine the kind of battery you require and locate a replacement. Find an opening inside of the fob. Then, insert a coin (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, pull the old battery out and insert the new one. Make sure the new battery is in the correct orientation. Clip the inside of your fob to insert the key made of metal. Transponder Chips The majority of new cars built since 1995 have transponder chips within the head of the key to disable the immobiliser system. The head of a key that includes a transponder chips can be removed to reveal an L-shaped key. The process of getting a replacement key fob made of a transponder chip is a multi-stage method that involves precise cutting of replacement keys and programming the transponder chip so that it can synch up with the vehicle's immobiliser system. Transponders are electronic device with Non-Volatile Memory (NVM) that houses a set of windings (very fine wire twisted around tubes) that resemble ones in an electric motor. The windings generate a coded message that the car is able to read. If the code is valid, then the car will allow you to start it. There are two kinds of transponder chip, the first is called the 80-bit and the other is known as the circle + (General Motors). The former type is reusable but needs to be unlocked with a special device to work in another compatible vehicle. The second is more difficult to use since the old keys can be damaged, drilled or removed when key cases are changed. However, they can be used with a service-key that does not require a battery. Immobiliser Systems An immobiliser system is a security measure that uses electronic technology which prevents thieves from opening your vehicle. It operates by sending an electronic signal from the car to your key each time you attempt to start it. The electronic chip in 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, your engine will immediately shut down to prevent theft. Modern smart keys and fobs come with an embedded transponder which stores electronic security information in a format which cannot be easily copied. When G28CarKeys or fob are inserted in the ignition, they transmit this code to the ECU. The ECU will then check it against the code stored in its memory and then activates the ignition system and fuel circuit if the two match. If the codes don't match then the engine will not start even when the ignition circuit has been damaged by a thief. The procedure of replacing the fob or key requires a multi-stage procedure that includes cutting the new blade with precision and programming it to ensure that it is compatible with your car's system. There are a variety of immobiliser systems used in different models and years, and each requires the use of a unique programming method. We utilize Ross-Tech software to ensure that your replacement key is programmed correctly to ensure the best performance and security.