Lexus Key Replacement - Replacing a Remote Or Fob
Whether you have a conventional Lexus key that is used to turn on the ignition or a smart key for your car that begins with the push of a button, in time the battery in the fob will deplete. Replacing it is easy with a paperclip. Simply pop the battery that is in use and then insert the new one (refer to the owner's guide to determine which battery you need) and then clip it back into place.
Keys
Lexus keys aren't easy to replace. A specialist locksmith is needed to make an alternative that functions. Every Lexus key is equipped with an embedded microchip, which needs to be programmed in order to connect with the immobiliser system of your vehicle.
It takes a lot time and specialized equipment to allow this procedure to be completed correctly. Each model has its own specific programming process. Replacing remotes or keys is a cost-effective service that you should leave to professionals unless you are equipped with the right tools and know-how.
You'll need to replace the batteries in your smart key or conventional key. Both keys work by turning the barrel of the ignition. This can be done yourself however you'll need an inexpensive Phillips Screwdriver, 20p coins and a paperclip. You will find one or two screws on the back of the key fob. Unscrew them, and then store them in a safe place (they are small and easy to lose). The fob is removed, revealing an indentation that is circular where the key's metal part will be. Remove the battery with the paperclip, and then insert the new battery, ensuring that it's properly inserted. Then, clip the outside of the key back to the fob.
Remotes
Replacing a Lexus remote or fob can be complicated and requires skilled locksmiths who have the right tools and knowledge. Certain models require that the transponder chip in the key be programmed to function with the car's immobiliser system. The Lexus models employ different methods to program these chips. This is done with an instrument that sends an indication to the chip which matches the code used to open the doors and start the engine.
Some Lexus cars are constructed with a single unit that incorporates the key head as well as the remote, and these are simpler to replace as there is no separate chip. This type of key can also be a bit less expensive.
All fobs eventually lose their battery power, no matter the type of key. This can be a very frustrating experience, but it's possible to get your Lexus back on track with a bit of know-how. Refer to the owner's manual to determine what type of battery you require. Then, search for the replacement. Locate a small hole on the inside of your fob. Insert a coin (20p is a good choice) into the hole and twist. You should be able to see an area flat that you can remove with the help of a paperclip.
Then, take out the old battery and replace it with the new one. Make sure the new battery is inserted with the correct direction of operation. Finally, you can clip the inside of the fob back 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 can be used to disarm immobiliser systems. The head of a key which contains a transponder chip is able to be removed to reveal an L-shaped key. A replacement key or fob made of a transponder chip is a multi-stage procedure that involves precise cutting of key replacements and programming the transponder chip to link up with the vehicle's immobiliser.
Transponders are electronic device with Non-Volatile Memory (NVM) that houses a set of windings (very fine wire that is wrapped around a tube) which look similar to ones found in an electric motor. These windings generate a signal that the car can read. If the code is correct the car will start.
There are two types of transponder chips. One is known as the 80 bit and the other is known as a circle + (General Motors). replacement lexus car keys can be reused, but has to be unlocked using a special machine in order to work on a different vehicle compatible with it. The latter is a bit more difficult as the old keys are usually broken and then drilled through or thrown away when key cases are replaced. They can be salvaged however and then used to create a service key that does not require a battery to function.
Immobiliser Systems
Immobiliser systems are electronic security measures that prevent thieves from starting up your vehicle. It works by sending an electronic signal from the car to the key every time you try to start it. The chip inside your key responds with a unique code which must match that of the vehicle to start. If the codes do not match, the engine will stop immediately and stop the theft of your vehicle.
Modern smart keys and fobs are equipped with an embedded transponder chip that stores electronic security in a format that cannot be easily duplicated. When the fob or key are inserted in the ignition, they send this code to the ECU. The ECU compares this code with the one 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.
The procedure of replacing the fob or key involves a multi-stage procedure that includes cutting the new key blade with precision and programming it to ensure that it works with your car's systems. Each immobiliser system is unique and has its own unique programming procedure. We utilize Ross-Tech software to ensure that your replacement key is programmed correctly for the best performance and security.