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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, which starts with the push of a button, in time the battery in the fob will deplete. Replacing it is as simple as using a paperclip. Pop the existing battery out, insert the new one (refer to the owner's manual to determine which battery you require), and clip it back into place.

Keys

Lexus keys are not simple to replace and require a professional car key replacement locksmith to create a spare working. Each lexus car key key is equipped with a microchip which must be programmed in order to connect with the immobiliser system in your vehicle.

It takes a lot of time and special equipment for this procedure to be completed correctly. Each model has its own specific programming process. Replacing a lost or damaged key or fob is a costly job and one you should leave to professionals unless you possess the appropriate tools and experience.

You will need to replace the batteries in your smart key or standard key. Both keys work by turning the barrel of the ignition. You can save money by doing this yourself, but you'll need a small Phillips screwdriver and a coin (a 20p piece is a good choice) and a paperclip. On the front of the fob, you will see two or one screw take them off and place them somewhere safe (they're small and can be lost). Remove the fob and you will see a circular indentation for the key made of metal. Take the battery out (using the paperclip) and then insert the new one ensuring it's facing the right way up. Then 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 as well as knowledge. Some models require the transponder on the key to be changed to allow it to communicate with the immobiliser system of the car. The Lexus models use different methods to program these chips. This is accomplished using a special device which sends a code chip to unlock the doors or to start the engine.

Some lexus replacement keys automobiles are built with a single piece of hardware that consists of the key head as well as the remote. They are easier to replace since there is no separate chip. This type of key can also be a little cheaper.

All fobs eventually lose battery power, no matter the kind of key. It can be frustrating however, with a little know-how you can get your Lexus up and running again. The first step is to consult the owner's manual to determine what kind of battery you need and then locate an alternative. Find a small hole on the inside of the fob. Insert a coin (20p works well) into the hole and then twist. You will see an open area that you can get rid of using the help of a paperclip.

Next, pop the old battery off and insert the new one. Make sure that the new battery is inserted with the proper polarity. Clip the inside of your fob to insert the key in the metal.

Transponder Chips

Transponder chips are in the key heads of almost all new vehicles manufactured after 1995. They are used to disable immobiliser systems. If you've got keys with a chip in it the head has a plastic cover that can be pulled off to reveal an L-shaped metal key. A transponder-chip replacement keys or fob is a multi-stage procedure. It involves cutting keys precisely and programming the chip to sync up with the vehicle immobiliser.

Transponders are chips with Non-Volatile Memory. It has a set of windings that are fine wires coiled around the tube. They resemble the ones in an electric motor. The windings are coded to create a signal that the car can read. If the code is correct the car will start.

There are two kinds of transponder chip. The one is known as the 80-bit while the other is known as the circle + (General Motors). The first is reusable, however it needs to be delocked using a specific machine in order to work on a different vehicle compatible with it. The second is more difficult to use as the older ones could be damaged, drilled or thrown out when key cases are changed. However they can be utilized with a service key that doesn't require a battery.

Immobiliser Systems

Immobiliser systems are electronic security measures which prevent thieves from starting up your vehicle. 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 a unique code which must match that in the vehicle to start. If the codes do not match, the engine will stop immediately to stop theft.

Modern smart keys and fobs come with embedded transponder chips that stores electronic security in a format that cannot be duplicated. When the key or fob are inserted into the ignition, they send this code to the ECU. The ECU will then check it against the code that is stored in its memory and activates the fuel system and ignition circuit if they match. If the codes don't match, the engine will not start - even if someone tries to short-circuit the ignition circuit.

Replacing a fob or a key is a multi-stage process which involves precise cutting the new blade for the key and programming it to connect with the immobiliser system of your vehicle. Every immobiliser system is unique and has its own unique programming procedure. We use Ross-Tech software to ensure that your replacement key is programmed correctly to ensure optimum performance and maximum security.