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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 function or will not turn on. There are a few easy steps you can take to resolve the problem. The first step is to take the metal emergency key from the key fob. Use the flat edge of a key made of metal to press the cover and twist it open. Keyless Entry System Keyless entry systems are a wonderful convenience for anyone who drives. You can lock your car before you touch the handle or walk out of the door for the passenger. Some even turn on the light as you approach. Others will open the trunk when carrying groceries or other electronic devices that are based on proximity. The key fob transmits a radio frequency signal the car's receiver, which in turn sends an answer code back to the vehicle. The signal will only be valid if the key fob is in a certain area, usually 50 feet or less. Some of these systems are one-way, meaning the key fob is able to be used to lock or unlock the vehicle, but cannot start the engine. It is recommended to have your keyless entry system installed by a professional regardless of the model. A good automotive locksmith will ensure that the connection is safe and complete, incorporating stripping a small portion of each wire to join it. The instructions manual will provide you with the exact wires to use and it is vital that you only use the ones required. Another perk of keyless remote access is that it could also lock your doors automatically when you step away from the vehicle. This is beneficial for those who forget and are prone to leaving their vehicle unlocked for all day. Transponder Keys Transponder keys (or transponder chips) are an important feature in most modern cars. The chips are incorporated into the head of a fob or key and include a unique code that is connected to your vehicle's immobilizer system. When a key is fitted into the ignition lock cylinder and then turned to ON the signal is transmitted from the antenna ring that is located on the top of your vehicle's ignition to your transponder chip. The chip transmits a response back to the antenna ring, which matches your car's code. The use of a transponder chip can deter theft because the keys must be put in correctly and have the right code to enable your car turn on. These keys are also harder to duplicate, making it less likely for someone to steal your vehicle. A reputable locksmith will make transponder keys that can be programmed to match your car at just a fraction of the cost that you pay at a dealership for cars. lexus key lost can also help you figure out what type of key you have and how to program it for your vehicle. They might also be able offer you an alternative to the transponder that was stolen or lost key. They may also be able to assist you reprogramme your chip if it's not working. Duplicate keys It doesn't matter if it's your car keys or your house keys, the majority of people have lost their keys at some point in their lives. It can be very frustrating to be locked out of your home or vehicle. It's important to have duplicate keys in order to avoid this issue. These duplicates will help you open your lock should you ever get stuck. The majority of duplicate keys have a “do duplicate” message that is stamped or engraved on the keys. This is a way to alert others know that it is not legal to copy a key unless they are the owner. These keys are utilized for padlocks and deadbolts as as other door locks. These keys are also great to keep the track of which key for a customer is which. Many people think that the “do duplicate” message on the keyboard can make it more secure. This isn't the case. The engraved message is only a warning, and does not carry any legal weight. However, it might dissuade some people from trying to have their key duplicated. Most chain hardware stores do not cut keys. However locksmiths are able to replicate the keys. In fact, they could be cut on a lookalike blank to ensure that the duplicate is authentic. Battery Replacement If your Lexus keyfob isn't working it might need to be reprogrammed to ensure that it is compatible with the immobilizer system in the vehicle. You'll need to call a locksmith or your dealer to modify the ECU. Locksmiths usually charge more than the dealership, however you'll be able to avoid the headache of towing your vehicle. In addition to the ECU, it is possible that your battery may need to be changed. You'll have to replace the old battery with a new one that matches your car's specific specifications. This includes the physical dimensions of the battery, the terminal configuration, and cold cranking amps or amp-hour rating. The wrong battery installation can cause serious damage to your engine and other components. If you are considering purchasing a replacement battery, examine the warranty to determine if it covers the cost. You may also want to think about whether you'll need an assurance in the event that the battery fails during its warranty. Additionally, you must keep in mind that automotive locksmiths often don't carry the tools needed to code keys, so you'll need to either have an online or dealer key programmer come in and program the key for you. Also, you should inform them about the kind of key you had (chip or intelligent fob remote “push to start”), the year of your vehicle, and the VIN number if possible.