Lexus Key Replacement - Replacing a Remote Or Fob
If you have a traditional Lexus key that is used to turn on the ignition or a smart key for your car that activates by pressing an arrow, eventually the battery inside your key will go out. It is simple to replace it with the use of a paperclip. Simply remove the old battery, replace it with the new battery (refer to the owner's manual for the type of battery you require) and then secure it back in place.
Keys
Lexus keys aren't always easy to replace. A professional locksmith is needed to make an appropriate replacement that functions. This is because each Lexus key contains a microchip that needs to be programmed in order to synchronise with the immobiliser of your vehicle If it is not, the car will not start.
This process requires time and special equipment to execute right, and each model has a distinct procedure for programming. Replacing a remote or key fob is a cost-effective service and should be left to experts unless you have the proper tools and knowledge.
You will need to replace the batteries in your smart key or conventional key. Both keys work by turning the barrel of the ignition. You can save money by doing it yourself, but you'll need an inexpensive Phillips screwdriver as well as coins (a 20p piece works well) and a paperclip. There are two or three screws on the back of the fob that holds the key. Unscrew them and store them securely (they are small and easy to lose). Remove the fob and you will see a circular indentation for the metal key, pop the battery out (using the paperclip) and insert the new one, making sure it's facing the right way up. Then, you can clip the inside of the key back together.
Remotes
Replacing the Lexus remote or fob can be difficult and requires skilled locksmiths who have the right tools as well as knowledge. Certain models require the transponder within the key to be reprogrammed so that it can work with the immobiliser system of the car. The Lexus models use different methods to program these chips. This is accomplished by using a specific device that transmits a code to the chip to unlock the doors or start the engine.
Certain Lexus vehicles are designed with a device that combines the key head and the remote. They are simpler to replace, since there is no separate chip needed. This kind of key may also be a little cheaper.
Regardless of the key type, all fobs eventually run out of battery power. This can be a very frustrating situation, but it's possible to get your Lexus back to normal with a bit of know-how. Start by reading the owner's manual to determine what kind of battery you require and then locate an alternative. Locate a small hole on the inside of your fob. Insert replacement lexus keys www.thekeylab.co.uk (20p is a good choice) into the hole and twist. You will see a flat area that you can remove with an ordinary paperclip.
Next, pop the old battery out and insert the new one. Make sure that the new battery is in the proper orientation. Clip the inside of your fob together and insert the key metal.
Transponder Chips
Transponder chips are in the key heads of a majority of new cars produced since 1995. They are used to disable immobiliser systems. If you have a key with a chip inside, the head is covered in a plastic cover which can be pulled off to reveal an L-shaped metal key. The process of getting a replacement key fob that is made using a transponder chip is a multi-stage process that includes precise cutting of replacement keys and programming the transponder chip so that it can synch up with the vehicle's immobiliser.
A transponder is an electronic device with Non-Volatile Memory (NVM) that has a set of windings (very fine wire twisted around the tube) that resemble ones found in an electric motor. The windings are coded to create a signal that the car can read. If the code is correct then the car will allow you to start it up.
There are two kinds of transponder chip. The first is called the 80-bit and the second is called the circle + (General Motors). The former can be reused but it needs to be unlocked by a machine that is specially designed to work in another compatible vehicle. The second is more difficult to use as the old keys can be broken, drilled, or taken away when key cases are changed. However, they can be used with a service-key which doesn't require a battery.
Immobiliser Systems
Immobiliser systems are electronic security devices that prevent thieves from starting up your vehicle. It operates by sending an electronic signal from the vehicle to the key whenever you try to start it. The chip inside your key responds with a unique code which must match that of the vehicle in order to start. If the codes aren't compatible, the engine will shut down immediately, preventing theft of your vehicle.
Modern smart keys and fobs are equipped with an embedded transponder that stores electronic security information in a format which cannot be easily copied. When your fob or key is placed in the ignition, it transmits this code to a receiver inside the ECU. The ECU is able to compare this code with the one stored in its memory, and then activates the fuel system and the ignition circuit if they are compatible. If the codes do not match, the engine will not start even when the ignition circuit has been cut off by a criminal.
Replacing a key or fob is a multi-stage procedure that involves precise cutting of the new key blade and programming it to work with the immobiliser system of your vehicle. There are many different immobiliser systems that are used in different models and years, and each requires its own unique programming procedure. We utilize Ross-Tech software to ensure that your replacement key is programmed correctly for maximum performance and security.