Lexus Key Replacement - Replacing a Remote Or Fob
If you have a traditional Lexus key that turns in the ignition, or a smart key for your car that begins by pressing a button, eventually the battery in your fob will run out. It is easy to replace it using the use of a paperclip. Simply remove the old battery, replace it with the new battery (refer to the owner's manual to determine the type of battery you need) Then, clip it back into its place.
Keys
Lexus keys aren't always easy to replace. A specialist locksmith is required to create an appropriate replacement that functions. This is because each 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 be able to start.
It takes a lot time and equipment that is specially designed for this process to be carried out correctly. Each model has its own specific programming process. Replacing keys or remotes is a pricey task that should be left to professionals unless you are equipped with the proper tools and expertise.
You will need to replace the batteries in your smart key or standard key. Both keys operate by turning the barrel of the ignition. It's a simple task to do but you'll need an inexpensive Phillips Screwdriver, a coin worth 20p and a paperclip. On the front of the fob, you will see two or more screws, unscrew them and put them in a safe location (they're small and easy to lose). Remove the fob to reveal a circular indentation for the key made of metal. Take the battery out (using the paperclip) and insert the new one, making sure that it's pointing the right way up. Clip the the key to secure it.
Remotes
Replacing a Lexus remote or fob can be difficult and requires expert locksmiths with both the right tools and knowledge. Certain models require that the transponder chip contained in the key be changed to function with the immobiliser system of the car. The Lexus models employ different methods to program these chips. This is done using a special device that sends a signal to the chip which matches the code used to open the doors and start the engine.
Some Lexus automobiles are built with a single unit that consists of the key head as well as the remote, and these are simpler to replace as no separate chip is required. This kind of key is also less expensive.
All fobs eventually lose battery power, no matter the kind of key. It can be frustrating however, with a bit of knowledge you can get your Lexus back to normal. First, consult the owner's guide to determine the kind of battery you require and find an alternative. Then, find tiny holes on the inside of the fob. Then, insert coins (a 20p piece is ideal) and twist. There should be a flat surface that you can take out with a paperclip.
Then, pull the old battery away and then insert the new one. Make sure to insert the battery using the correct polarity. Clip the inside of the fob together, then insert the metal key.
Transponder Chips
Nearly all new cars made since 1995 include transponder chips in the key head to disable the immobiliser system. The head of a key that is equipped with a transponder chip may be removed to reveal a metal L-shaped key. Having a replacement key or fob made of a transponder chip is a multi-stage process which includes precise cutting of replacement keys as well as programming the transponder chip to synch up with the vehicle's immobiliser system.
A transponder is a chip with Non-Volatile Memory. It contains a set windings which are fine wires coiled around the tube. They look like those in an electric motor. These windings generate a signal that the car can read. If the code is correct it will allow the car to start.
There are two kinds of transponder chip. The first is called the 80-bit and the second is called the circle + (General Motors). The first one is reusable, but must be unlocked using a special machine in order to work on another compatible vehicle. The latter is a bit more difficult since the earlier keys are usually damaged and drilled or discarded when key cases are replaced. However, they can be used with a service-key that doesn't require a battery.
Immobiliser Systems
An immobiliser system is a security measure that uses electronic technology which prevents thieves from opening your vehicle. It operates by sending a signal from your vehicle to the key whenever you attempt to start it. The electronic chip inside your key responds with an individual code that must match the one found in the vehicle in order to start. If TheKeyLab don't match, your engine will stop immediately and prevent theft of your car.
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 inserted into the ignition, it transmits the code to a device within the ECU. The ECU examines the code against the one stored in its memory and activates both the fuel system as well as the ignition circuit if they match. If the codes don't match then 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 blade for the key and programming it to synch with your car's immobiliser system. Each 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 the best performance and security.