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 activates with the push of a button, eventually the battery inside your fob will run out. It's easy to replace it using an ordinary paperclip. Simply take out the old battery, insert the new battery (refer to the owner's manual to determine the type of battery that you require) and then clip it back into the correct position.
Keys
Lexus keys can be difficult to replace. A professional locksmith is required to design an appropriate replacement that functions. Each Lexus key comes with an embedded microchip, which needs to be programmed in order to work with the immobiliser system in your vehicle.
It requires a lot time and specialized equipment to allow this procedure to be executed correctly. Each model has its own procedure for programming. Replacing remotes or keys is a pricey task that should be left to professionals unless you are equipped with the right tools and knowledge.
You will need to replace the batteries in your smart key or standard key. Both keys work by turning the barrel of the ignition. You can save money by doing this yourself but it will require only a small Phillips screwdriver and an old coin (a 20p piece is a good choice) and a paperclip. On the back of the fob, you will see either one or two screws, unscrew them and put them in a safe location (they're small and can be lost). Take the fob off to reveal an indentation of circular shape for the key made of metal. Pop the battery out (using the paperclip) and insert the new one ensuring it's the correct way up. Then, clip the outside of the key back together.
Remotes
Lexus remotes and fobs can be difficult to replace and require locksmiths who are both well-versed and have the proper tools. Some models require the transponder within the key to be programmed in order to function with the immobiliser of the vehicle. The Lexus models use different methods to program these chips. This is done using an electronic device that transmits a signal to the chip which matches the code used to open the doors and start the engine.
Certain Lexus cars are constructed with a single piece of hardware that incorporates the key head as well as the remote. These are more simple to replace since there is no separate chip. lexus key thekeylab.co.uk of key is also a bit less expensive.
Whatever the type of key no matter what type of key it is, all fobs eventually run out of battery power. It can be quite frustrating but with a little bit of knowledge you can get your Lexus up and running. Read the owner's guide to determine the type of battery you require. Then, find an alternative. Find tiny holes on the inside of the fob. insert a coin (a 20p piece works well) and twist. You should be able to see a flat surface that you can remove with an ordinary paperclip.
Then, remove the battery that was used and replace it with the new one. Be sure to insert the battery with the proper polarity. Finally, you can clip the inside of the fob back together, and re-insert the metal key.
Transponder Chips
Transponder chips are found in the head of the key on almost all new cars manufactured since 1995. They are used to disarm immobiliser systems. The head of a key that is equipped with a transponder chip may be removed to reveal a metal L-shaped key. Making a replacement key, or fob made with a transponder chip is a multi-stage method that includes accurate cutting of the key replacements and programming the transponder chip to link up with the vehicle's immobiliser.
Transponders are electronic chip with Non-Volatile Memory (NVM) which contains a set of windings (very fine wire that is wrapped around a tube) that resemble ones in an electric motor. These windings produce a coded message that the car read. If the code is correct then the car will allow you to start it.
There are two kinds of transponder chip, the first is called the 80-bit, while the second is known as the circle + (General Motors). The first one is reusable, but must be unlocked using a special machine in order to work on another compatible vehicle. The second type is more difficult to use because the old ones can be broken, drilled or removed when key cases are changed. They can be salvaged, however and used with an ad-hoc key that doesn't require a battery in order to function.
Immobiliser Systems
An immobiliser system is an electronic security feature that stops thieves from starting your car. It operates by sending a signal from your vehicle to the key when you attempt to start it. The electronic chip inside your key then responds with a unique code which must match the one found in the vehicle in order to start. If the codes do not match, the engine will shut down immediately and stop the theft of your car.
Modern smart keys and fobs have embedded transponder chips that stores electronic security in a format that cannot be easily duplicated. When your key or fob is inserted into the ignition, it transmits the code to a device within the ECU. The ECU is then able to compare it with the code stored in its memory and then activates the ignition system and fuel circuit if the two coincide. If the codes do not match, the engine will not start - even if someone tries to short-circuit the ignition circuit.
Replacing a fob or key is a multi-stage procedure that requires precise cutting of the new blade of the key and programming it to work with the immobiliser system of your vehicle. There are many different immobiliser systems used in different models and years and each has its own unique programming procedure. We employ Ross-Tech to ensure that the replacement key is correctly programmed. This will ensure the best performance and security.