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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 that begins with the press of a button, in time the battery in the fob will deplete. Replacing it is easy with a paperclip: Take the battery that is in use and then insert the new one (refer to your owner's manual to see which type of battery you require), and clip it back in place. Keys Lexus keys can be difficult to replace. A professional locksmith is required to create a spare that works. This is because every Lexus key is equipped with microchips that need to be programmed to synchronise with the immobiliser system of your vehicle If it is not, the car will not start. It takes a lot of time and specialized equipment for this process to be carried out correctly. Each model has its own specific programming process. Replacing remotes or keys is a costly task that should be left to professionals, unless equipped with the right equipment and know-how. You will have to replace the batteries in your smart key or traditional key. lexus car key replacement www.g28carkeys.co.uk operate by turning the barrel of the ignition. You can save money by doing this yourself, but it requires an inexpensive Phillips screwdriver as well as the coin (a 20p piece works best) and a paperclip. You will find one or two screws on the back of the fob that holds the key. Unscrew them and store them securely (they are small and easy to lose). The fob can be removed to reveal a circular indentation for the metal key, pop the battery out (using the paperclip) and then put in the new one making sure it's facing the right way up. Clip the inside of the key back together. Remotes Lexus remotes and fobs can be difficult to replace and require locksmiths who are both knowledgeable and have the right tools. Certain models require the transponder within the key to be changed to work with the immobiliser systems of the car. These chips are programmed by different methods, based on the model of Lexus. This is accomplished using a special device which sends a code chip to unlock the doors or start the engine. Certain Lexus vehicles are equipped with a unit that combines the key head and the remote. These are easier to replace since there is no chip that needs to be replaced. This type of key is also less expensive. Whatever the type of key regardless of the type of key, all fobs eventually run out of battery power. It can be a frustrating experience however, with a little knowledge you can get your Lexus back to normal. Read the owner's guide to determine which type of battery you require. Find the replacement. Find a small opening on the inside of your fob. Insert a coin (20p works well) into the hole and twist. You will see a flat surface that you can remove with the help of a paperclip. Then, take out the battery that was used and replace it with the new one. Be sure to insert the battery using the correct the polarity. Finally, clip the inside of the fob back to its original position and re-insert the metal key. Transponder Chips Transponder chips are in the head of the key on almost all new cars produced since 1995. They are used to disable immobiliser systems. If you've got keys with a chip in it the head comes with a cover which can be pulled off to reveal an L-shaped metal key. A transponder-chip replacement keys or fob is a multi-stage procedure. It involves cutting the keys with precision and programming the chip to connect with the vehicle immobiliser. A transponder is a type of chip with Non-Volatile Memory. It has a set of windings, which are fine wires that are wrapped around the tube. They look like those in an electric motor. The windings generate a coded message that the car read. If the code is correct the car will begin to move. There are two types of transponder chips, one known as the 80 bit and the other is known as a circle + (General Motors). The first is reusable but needs to be unlocked by a machine that is specially designed to function in a different compatible vehicle. The latter is a bit more difficult because the previous keys are often damaged or drilled through, or discarded when key cases are replaced. However, they can be utilized with a service key that doesn't require a battery. Immobiliser Systems An immobiliser is an electronic security measure that deters thieves from starting your car. It operates by sending a signal from the vehicle to your key when you attempt to start it. The chip inside the key responds with an unique code that must match that of the vehicle in order to start. If the codes don't match, the engine will stop immediately, and stop theft of your car. Modern smart keys and fobs are equipped with an embedded transponder that can store electronic security information in a format which is not easily copied. When your key or fob is placed in the ignition, it transmits the code to a receiver in the ECU. The ECU is able to compare this code with 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, the engine will not start even when the ignition circuit has been short-circuited by a thief. Replacing a key or fob is a multi-stage procedure that involves precise cutting of the new blade for the key and programming it to synch with the immobiliser system of your vehicle. Each immobiliser system is distinct and has its own programming procedure. We use Ross-Tech to ensure that the replacement key is programmed correctly. This will give you maximum performance and security.