Lexus Key Replacement - Replacing a Remote Or Fob
The battery in your key fob will eventually go out, regardless of whether it's the standard Lexus Key that turns the ignition on or an intelligent key for your vehicle that can start by pressing a button. Replacing it is easy with a paperclip: Take the old battery out and then insert the new one (refer to the owner's manual to determine which battery you need) and then clip it back in the correct position.
Keys
Lexus keys aren't simple to replace and require a professional locksmith for car keys to make a working spare. This is because every Lexus key contains an embedded microchip that must be programmed to synchronise with your vehicle's immobiliser system If it is not, the car will not be able to start.
It requires a lot of time and specialized equipment to allow this process to be carried out correctly. Each model has its own programming procedure. Replacing remotes or keys is a pricey task that should be left to experts, unless equipped with the proper tools and know-how.
It doesn't matter if you have a standard key that is turned on in the ignition barrel, or an electronic key that starts your car at the click of the button Both will eventually require their batteries replaced. This can be done yourself but you'll need a small Phillips Screwdriver, 20p coin and paperclip. You will find one or two screws on the back of the key fob. Unscrew them and store them securely (they are small and easy to lose). Take the fob off to reveal an indentation that is circular for the metal key, pop the battery out (using the paperclip) and then put in the new one making sure it is the right way up. Clip the inside of the metal key back together.
Remotes
Lexus remotes and fobs aren't easy to replace and require locksmiths who are both skilled and possess the appropriate tools. Some models require the transponder within the key to be programmed to allow it to communicate with the immobiliser of the vehicle. The Lexus models use different methods to program these chips. This is accomplished by using a specific device that sends a signal to the chip that is compatible with the code used to open the doors and start the engine.
Certain Lexus models are built with a device that combines the key head and remote. They are simpler to replace, since there is no separate chip to replace. This kind of key may also be a bit cheaper.
All fobs eventually lose their battery power, regardless of the kind of key. It can be quite frustrating, but with a little knowledge you can get your Lexus back in operation. First, consult the owner's manual for the type of battery you need and then locate a replacement. Find tiny holes on the inside of the fob. insert coins (a 20p piece is a good choice) and twist. This should reveal a flat spot that you can make use of a paper clip to take away.
Then, take the old battery out and replace the new one. Make The Keylab that you insert the battery with the correct orientation. Clip the inside of your fob together and insert the key made of metal.
Transponder Chips
The majority of new cars built since 1995 have transponder chips within the key head that allow it to deactivate the immobiliser system. The head of a key that has a transponder chip can be removed to reveal a metal L-shaped key. A replacement key or fob with a transponder chip is a multi-stage procedure that involves precise cutting of key replacements and programming the transponder chip in order to synch up with the vehicle's immobiliser.
A transponder is a chip that has Non-Volatile Memory. It is comprised of a set of windings, which are very fine wires coiled around a tube. They look like the ones in an electric motor. The windings generate a coded message that the car can read. If the code is valid, then the car will allow you to start it up.
There are two types of transponder chip. The one is known as the 80-bit while the other is known as the circle + (General Motors). The first one is reusable, but it must be unlocked with a special machine in order to work on another compatible vehicle. The second one is more difficult to use as the older keys could be broken, drilled or thrown out when key cases are changed. However they can be used with a service-key which doesn't require a battery.
Immobiliser Systems
An immobiliser system is an electronic security measure that prevents thieves from starting your car. It works by sending a signal from your vehicle to your key when you attempt to start it. The electronic chip in your key then responds with a unique code that must match the one found in the vehicle in order to start. If the codes do not coincide, your engine will shut down immediately to stop theft.
Modern smart keys and fobs have an embedded transponder chip that stores security information 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 is then able to compare it with the code stored in its memory and then activates the ignition and fuel system circuit if they match. If the codes don't match, the engine won't start - even if an armed robber attempts to short-circuit the ignition circuit.
Replacing a key or fob is a multi-stage process that involves precise cutting of the new key blade and programming it to communicate with the immobiliser system of your vehicle. 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 optimum performance and maximum security.