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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly It can be very frustrating when your key fob doesn't work or switch off. There are simple steps you can take to solve the issue. First, remove the metal emergency keys from the key fob. Then utilize the flat side of the key's metal end to press and then twist the cover to open. Keyless Entry System The keyless entry system can be a great convenience to any car owner. They allow you to unlock your car before you even touch a handle or step out of the doorway for the passenger. Some of them will even turn on the lights as you approach. Others will open the trunk if you are carrying groceries, or any other electronic devices that are based on proximity. The key fob transmits a radio frequency signal the car's receiver and then sends a response code back to the vehicle. The signal is only effective when the key fob is within a specific distance, which is typically 50 feet or less. Some of these systems are one-way. This means that the key fob can lock or unlock the vehicle, but can't start the engine. Whatever keyless entry system you choose it is advised to have it professionally installed. A professional locksmith in the automotive industry will make sure the connection is secure and complete, including stripping a small amount of each wire in order to connect it. The manual will inform you the wires you should use. A remote with a keyless entry feature can also lock the doors when you walk away. This is beneficial for those who forget and tend to leave their vehicle unlocked for all day. Transponder Keys Transponder keys, also known as transponder chips are a standard feature of modern automobiles. They are embedded in the head of a fob or key and have a unique code which is linked to the car's immobilizer system. When a key is fitted into the ignition lock cylinder, and then turned to ON, a signal is sent from the antenna ring that is located on the top of your car's ignition to the transponder chip. The chip sends an algorithm for code-matching to the antenna ring. The use of a transponder chip is a deterrent to theft since the keys must be put in correctly and contain the correct code to enable your car turn on. These keys are also difficult to duplicate, which makes it less likely for someone to take your car. A locksmith who is reputable can make transponder keys that can be programmed for your vehicle at a fraction of what you would pay at an auto dealership. They can also assist you to understand what type of key you own and how to program it to your car. They might even be able to give you a replacement for the transponder that was stolen or lost key. They may also be able to assist you re-programme your chip if it's not working. Duplicate Keys No matter if they're your car keys or your house keys, the majority of people have lost their keys at some time in their lives. If this occurs, it's uncomfortable and frustrating to be locked out of your home or vehicle. To avoid this situation it is essential to keep duplicate keys in your possession. These duplicate keys can be used to open your lock and assist you to gain access if you're in a bind. Most duplicate keys are engraved or stamped with the “do not duplicate” message. This is a way to alert others know that it's illegal to copy a key unless the owner is. These keys are utilized for padlocks and deadbolts as in other door locks. They are also an excellent tool for keeping the track of which key for a customer is which. Many people think that the “do duplicate” message on a keyboard is a way to make it more secure. However, this is not the case. The engraved message is only a warning, and has no legal weight. It might deter some people from attempting to duplicate their keys. Most chain hardware stores do not cut keys. However locksmiths are able to replicate the keys. TheKeyLab can be cut on a blank that looks like the original to ensure precision. Battery Replacement If your Lexus key fob isn't working, it's likely need to be reprogrammed in order to work with the immobilizer system of your vehicle. You'll need to visit the dealer or a locksmith that is certified to reprogram the ECU. Most locksmiths cost more than a dealership, but they'll save you the burden of having to tow your car there. In addition to the ECU there is a chance that your battery needs to be changed. You'll be required to replace the previous battery with one that matches the specifications of your vehicle. This includes the physical dimensions, terminal configuration and cold cranking amps (or amp-hour rating). Incorrectly installed batteries can cause severe damage to your engine as well as other components. Check the warranty before you buy a new battery to determine if the price is covered. You should also consider whether you need an insurance policy in the event that the battery fails during its coverage period. You should also keep in mind that a lot of automotive locksmiths do not have the tools required to program keys. Therefore, you'll have to find a dealer to program your key or make use of an online key programmer. Also, it's important to inform them of the kind of key you have (chip smart fob, intelligent fob remote “push to start”) as well as the year of your vehicle, and the VIN number, if applicable.