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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly It can be quite frustrating when your key fob will not function or it won't turn on. Fortunately, there are a few steps you can do to fix the issue. First, remove lexus key shell from the key fob. Then utilize the flat side of the key made of metal to press and twist the cover open. Keyless Entry System The keyless entry system can be a great option for anyone who owns a car. You can unlock your car as you even walk out of the passenger's door. Some even turn on lights when you approach or open the trunk if you have it loaded with groceries, or activate 10 other electronic devices depending on the proximity of your vehicle. The key fob transmits the radio frequency signal to the receiver inside the car and then sends a response code back to the vehicle. The signal only works when the key fob is within a particular range, which is usually 50 feet or less. Some of these systems are single-way, meaning the key fob can unlock or lock the vehicle, but it is not able to start the engine. Whatever keyless entry system that you choose, it is recommended to have it installed by a professional. A professional locksmith in the automotive industry will make sure the connection is safe and complete, incorporating stripping a small part of each wire to connect it. The instructions manual will provide you with the exact wires to use, and it is important that you only use the ones required. A remote that is keyless can also secure the doors when you walk away. This is helpful if are forgetful or have a tendency to leave your car locked for too long. Transponder Keys Transponder keys or transponder chips are a common feature of modern automobiles. The chips are incorporated into the head of a fob or key and contain a unique code that is connected to your vehicle's immobilizer system. The antenna ring at top of the ignition transmits a signal to the transponder chip once the key is inserted and switched ON. The chip sends an encoding response to the antenna ring. Transponder chips deter theft, because the key must be inserted correctly with the proper code to turn your car on. It's also a lot harder to duplicate these keys, so it's less likely that someone is able to steal your car. A reliable locksmith can make transponder keys that can be programmed for your vehicle at a fraction of what you would pay at a car dealership. They can also explain the type of key in your possession and how to program it. They might also be able to offer you a replacement for your stolen or lost transponder key. They may also assist you to reprogramme the chip if it has stopped working. Duplicate keys The majority of people have lost keys at some time in their lives regardless of whether it was their car keys or house keys. It can be a hassle to be locked out of your house or car. To avoid this it is essential to keep duplicate keys in your possession. These duplicate keys can be used to open your lock and allow you to get inside if you're ever stuck. The majority of duplicate keys are engraved or stamped with the “do not duplicate” message. This is to inform others that it is illegal to copy a key unless the owner of the key is present. Keys of this kind are typically used to lock deadbolts, padlocks, and other door locks. They are also an excellent method of keeping track of which keys belong to which customer. Many people think that the “do duplicate” message on the keyboard can make it more secure. This isn't the case. The message on the keys is an indication and does not have any legal value. It may discourage some people from trying to duplicate their key. Many chain hardware stores refuse to cut the keys, however locksmiths can easily duplicate the keys. They can be cut on a blank that appears like the original, to ensure the precision. Battery Replacement If your Lexus key fob isn't working, it's likely have to be programmed 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. A locksmith will usually charge more than the dealership, but you'll be able to avoid the headache of towing your vehicle. In addition to the ECU there is a chance that your battery will also need to be replaced. It is necessary to replace your old battery with one that is compatible with the specifications of your vehicle. This includes the physical dimensions, terminal configuration, as well as cold cranking amps (or amp-hour ratings). Incorrectly installed batteries can cause serious damage to your engine and other components. Before purchasing a new battery, be sure to verify the warranty to determine if it covers the cost. It is also advisable to consider whether you'll need an assurance in the event that the battery fails within its warranty period. Additionally, you must be aware that auto locksmiths often don't carry the tools required to code keys, so you'll have to either have a dealer or online key programmer come in and program the key for you. It's also important to tell them know the type of key you want (chip or intelligent, or remote “push-to-start”) and the year your car was, and the VIN if you can.