Lexus Key Replacement - Replacing a Remote Or Fob

The battery in the key fob will eventually wear out, whether you own an ordinary lexus replacement key fob Key that switches the ignition on or an intelligent one for your vehicle, which starts by pressing the button. It's easy to replace it with a paperclip: Pop the battery that is in use, insert the new one (refer to the owner's manual to determine which kind of battery you require) and then clip it back into the correct position.

Keys

Lexus keys aren't always easy to replace. A specialist locksmith is required to create an original replacement that works. This is due to the fact that every Lexus key contains an embedded microchip that must be programmed to sync with your vehicle's immobiliser system 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 comes with its own set of programming procedures. Replacing keys or remotes is a pricey task that should be left to professionals, unless equipped with the right equipment and know-how.

Whether you have a conventional key that rotates in the ignition barrel, or an electronic key that starts your car at the click of the button, both will eventually need their batteries replaced. It's easy to do it yourself however, you'll require a small Phillips Screwdriver, 20p coins and paperclip. You will find one or two screws on the back of the fob that holds the key. Remove them and store them securely (they are small and easy to lose). The fob can be removed to reveal an indentation with a circular shape that houses the key made from metal, take the battery out (using the paperclip) and then put in the new battery, making sure it is the right way up. Then, you can clip the inside of the key back to the fob.

Remotes

Replacing the Lexus remote or fob can be complicated and requires expert locksmiths with both the right tools and experience. Certain models require the transponder within the key to be changed so that it can work with the immobiliser of the vehicle. The Lexus models employ different methods to program these chips. This is done by using a special device which transmits a specific code to the chip to unlock the doors or to start the engine.

Some Lexus vehicles are designed with a unit that combines the key head and the remote. They are simpler to replace, as there is no separate chip to replace. This type of key is also a bit less expensive.

Regardless of the key type, all fobs eventually run out of battery power. This can be a very frustrating experience, but it is possible to get your Lexus back on track with a little knowledge. Consult the owner's guide to determine which battery type you require. Then, locate the replacement. Find an opening inside of the fob. Then, insert the coin (a 20p piece is ideal) and twist. The fob should be revealed as a flat area that you can use a paper clip to remove.

Next, pop the old battery out and replace the new one. Make sure that you insert the battery in the correct orientation. Finally, clip the inside of the fob back together and re-insert the metal key.

Transponder Chips

The majority of new cars since 1995 have transponder chips embedded in the head of the key to disable the immobiliser system. If you have a key with a chip inside, the head comes with a cover that can be pulled off to reveal an L-shaped metal key. A transponder-chip replacement keys or fob is a multistage process. It involves cutting the keys accurately and programming the chip to connect with the vehicle immobiliser.

Transponders are electronic chip equipped with Non-Volatile memory (NVM) that has a set of windings (very fine wire wrapped around tubes) that look like the ones found in an electric motor. These windings produce a coded message that the car is able to 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 referred to as a circle + (General Motors). The former type is reusable but needs to be unlocked by a machine that is specially designed to be used in a compatible vehicle. The second type is more difficult to use since the older ones could be damaged, broken or removed when key cases are changed. However they can be utilized with a service key that does not require batteries.

Immobiliser Systems

An immobiliser system is a security measure that uses electronic technology that stops thieves from starting your vehicle. It operates by sending a signal from your vehicle to the key when you attempt to start it. The electronic chip in the key responds by transmitting a unique code that must match that of the vehicle to allow it to start. If the codes do not match, your engine will shut off immediately to prevent theft.

Modern smart keys and fobs come with an embedded transponder that stores electronic security information in a format that cannot be easily copied. When the fob or key are placed in the ignition, they transmit this code to the ECU. The ECU will then check it against the code that is stored in its memory and then activates the fuel system and ignition circuit if the two coincide. If the codes do not match and the engine does not start, even when the ignition circuit is short-circuited by a burglar.

The replacement of the fob or key requires an entire process that involves cutting the new blade precisely and programming it to ensure that it syncs with your car's security system. There are many different immobilisers used in different models and years and each has its own unique programming procedure. We use Ross-Tech software to ensure that your Replacement lexus key key is programmed correctly to ensure optimum performance and maximum security.