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, which starts by pressing one button, eventually the battery inside your fob will die. It is easy to replace it using the use of a paperclip. Simply take out the old battery, replace it with the new one (refer to the owner's manual to determine the type of battery that you need) Then, clip it back in place.
Keys
Lexus keys are not easy to replace and require a specialist locksmith for replacing car keys to make a functioning spare. This is due to the fact that every Lexus key has an electronic chip that needs to be programmed to synchronise with the immobiliser system of your vehicle If it is not, the car will not start.
It requires a lot time and specialized equipment for this procedure to be executed correctly. Each model has its own procedure for programming. Replacing remotes or keys is a costly service that should be left to experts, unless equipped with the right equipment and know-how.
It doesn't matter if you have a standard key that is turned on in the ignition barrel, or a smart key that will start your car at the click of one button Both will eventually require their batteries replaced. This can be done by yourself however you'll need the smallest Phillips Screwdriver, a coin worth 20p and a paperclip. On the back of the fob you will see two or more screws remove them and place them in a safe location (they're small and easily lost). Remove the fob to reveal a circular indentation for the metal key, pop the battery out (using the paperclip) and then 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
Lexus remotes and fobs aren't easy to replace and require locksmiths who are experienced and possess the proper tools. Some models require that the chip inside the key be programmed in order to work with the immobiliser of the car. The chips are programmed with different methods, based on the model of Lexus. This is done with an instrument that sends an electronic signal to the chip which matches the code used to open the doors and start the engine.
Some Lexus vehicles are equipped with a system that combines the key head and the remote. They are much easier to replace, as there is no separate chip required. This kind of key may also be a bit less expensive.
All fobs eventually lose battery power, regardless of the type of key. This could be a difficult situation, but it's possible to get your Lexus back up and running with a little knowledge. Refer to the owner's manual to determine the type of battery you need. Then, locate the replacement. Then, locate a small hole in the inside of the fob. insert coins (a 20p piece is a good choice) and twist. You should be able to see an open area that you can remove with the help of a paperclip.
Next, pop the old battery away and then insert the new one. Make sure that the new battery is in the correct polarity. Clip the two sides of your fob together and insert the key in the metal.
Transponder Chips
Transponder chips are present in the head of the key on almost all new vehicles manufactured after 1995. They can be used to disable immobiliser systems. If you've got a key that has a chip inside it, the head comes with a cover that can be pulled off to reveal an L-shaped key. Having a replacement key or fob with a transponder chip is a multi-stage procedure that involves precise cutting of replacement keys as well as programming the transponder chip to synch up with the vehicle's immobiliser system.
Transponders are electronic chip with Non-Volatile Memory (NVM) which contains a set of windings (very fine wire twisted around the tube) that look like the ones found in an electric motor. These windings generate a signal for the car to read. If the code is correct the car will start.
There are replacement lexus key of transponder chips. One is called the 80 bit and the other referred to as a circle + (General Motors). The first one is reusable, however it needs to be delocked using a specific machine to function on a different vehicle compatible with it. The latter is a bit more difficult since the earlier ones are often broken or drilled through, or discarded after key cases are replaced. They can be salvaged, however and then used to create a service key that doesn't require batteries to operate.
Immobiliser Systems
An immobiliser system is an electronic security feature which prevents thieves from opening your car. It works by sending a signal from your vehicle to the key whenever you attempt to start it. The electronic chip inside the key responds with an unique code that must match that of the vehicle in order to start. If the codes do not match, the engine will stop immediately, preventing theft of your vehicle.
Modern smart keys and fobs have an embedded transponder chip that stores electronic security in a format that cannot be duplicated. When the fob or key is inserted into the ignition, they send this code to the ECU. The ECU analyzes this code in comparison to the one stored in its memory and activates the fuel system and the ignition circuit if they are compatible. If the codes do not match, your engine will not start - even if a thief tries to short-circuit the ignition circuit.
The replacement of the fob or key requires a multi-stage procedure that includes cutting the new key blade with precision and programming it to ensure that it can be synced with your car's system. Every immobiliser system is unique and has its own unique programming procedure. We utilize Ross-Tech to ensure that the replacement key is programmed correctly. This will ensure maximum performance and security.