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 activates with the push of one button, eventually the battery inside the fob will deplete. It's easy to replace it with a paperclip. Simply pop the battery that is in use and replace it with the new one (refer to your owner's manual to determine which battery you need) and then secure it back in the correct position.
Keys
Lexus keys aren't easy to replace and require a professional locksmith to replace your car key to create a working spare. Every Lexus key is equipped with a microchip which must be programmed to communicate with the immobiliser system in your vehicle.
This procedure takes time and specialized equipment to complete properly, and each model has a distinct programming procedure. Replacing a remote or key fob is a cost-effective service and one you should leave to experts unless you have the appropriate tools and experience.
If you have a traditional key that rotates in the ignition barrel or a smart key that will start the car with the click of a button they will both eventually need their batteries replaced. This can be done yourself but you'll need the smallest Phillips Screwdriver, a 20p coin and a paperclip. On the side of the fob you will find two or three screws, unscrew them and put them in a safe location (they're small and can be lost). The fob is removed, revealing an indentation of a circular shape where the key's metal part will be. Remove the battery by using a paperclip. Then, insert the new battery, ensuring that it's placed correctly. Clip the the key back to.
Remotes
Lexus remotes and fobs can be difficult to replace and require locksmiths who are experienced and possess the proper tools. Certain models require that the transponder chip within the key be changed in order to work with the immobiliser of the car. The Lexus models use different methods to program these chips. This is accomplished by using a special device that transmits a code to the chip to unlock the doors or start the engine.
Certain Lexus cars are designed with a device that combines the key head and remote. These are easier to replace since there is no chip that needs to be replaced. This kind of key is also cheaper.
All fobs eventually lose their battery power, no matter the kind of key. It can be frustrating however, with a little know-how you can get your Lexus back in operation. The first step is to consult the owner's manual for the type of battery you need and find a replacement. Find a small hole on the inside of your fob. Insert an amount of money (20p works well) into the hole and twist. The fob should be revealed as the flat spot, which you can make use of a paper clip to remove.
Then, take out the old battery and replace it with the new one. Be sure the replacement battery is installed with the correct polarity. Clip the two sides of your fob to insert the key in the metal.
Transponder Chips
Nearly all new cars manufactured after 1995 have transponder chips embedded in the key head that allow it to deactivate the immobiliser system. If you've got a key with a chip inside, the head is covered in a plastic cover that is able to be pulled off to reveal an L-shaped metal key. A replacement key or fob made of transponder chips is a multi-stage process that includes accurate cutting of the key replacements and programming the transponder chip to synch up with the vehicle's immobiliser.
Transponders are electronic chip equipped with Non-Volatile memory (NVM) that contains a set of windings (very fine wire coiled around tubes) which look similar to ones found in an electric motor. The windings generate a coded message that the car will read. If the code is correct then the car will allow you to start it up.
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 must be delocked by a machine that is specially designed to function in a different compatible vehicle. The latter one is more difficult as the old keys are usually broken and drilled or discarded when key cases are replaced. However they can be used with a service-key that does not require a battery.
Immobiliser Systems
An immobiliser system is an electronic security feature that stops thieves from starting your vehicle. It operates by sending an electronic signal from the car to your key each time you try to start it. The chip inside the key responds by transmitting a unique code that must match the one of the vehicle in order for it to start. If the codes don't match, your engine will stop immediately to stop theft.
Modern smart keys and fobs contain an embedded transponder, which stores electronic security information in a format that cannot be easily copied. When your key or fob is inserted into the ignition, it transmits this code to a device within the ECU. The ECU examines the code against the one in its memory and activates both the fuel system and the ignition circuit if they match. If the codes don't match, the engine will not start - even if an armed robber attempts to short-circuit the ignition circuit.
lexus replacement key programming of replacing the fob or key requires an entire process that involves cutting the new key blade with precision and programming it to ensure that it syncs with your car's system. Every immobiliser system is unique and has its own programming procedure. We utilize Ross-Tech to ensure that the replacement key is programmed correctly. This will give you maximum performance and security.