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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly It can be a hassle when your key fob will not function or will not turn on. Luckily, there are easy steps you can follow to fix the issue. The first step is to take the emergency key made of metal from the key fob. Utilize the flat side of a key made of metal to press on the cover and turn it to open. Keyless Entry System Keyless entry systems provide a huge benefit for any car owner. They allow you to unlock your car before you even touch the handle or step out of the doorway for the passenger. Some even turn on lights when you approach and open the trunk in case you've filled it with groceries, or turn on 10 other electronic accessories based on your proximity. The key fob transmits radio-frequency signals to the receiver inside the car. This receiver then sends back a response code to the vehicle. The signal is only effective only if the keyfob falls within a specific area, usually 50 feet or less. Some of these systems are one-way. This means that the key fob can secure or unlock the vehicle, but cannot start the engine. Regardless of the type of keyless entry system you pick, it is recommended to have it installed by a professional. A professional locksmith in the automotive industry can assure that the connection is completely and secure, even if that involves stripping a small portion of each wire. The manual will tell you which wires you need to use. A remote with a keyless entry feature can also lock the doors if you walk away. This is useful for those who forget and tend to leave their car unlocked long enough. Transponder Keys Transponder keys or transponder chips are a typical feature of modern automobiles. These chips are built into the head of a fob or key and have a unique code that is linked to your vehicle's immobilizer system. When a key is inserted into the ignition lock cylinder and then turned to ON, a signal is sent from the antenna ring on the top of your vehicle's ignition to your transponder chip. The chip then sends a response back to the antenna ring that is in line with your vehicle's code. Transponder chips discourage theft, as the key must be properly inserted using the right code to turn your car on. These keys are also difficult to duplicate, which makes it less likely that someone will steal your vehicle. A locksmith who is reputable can create transponder keys which can be programmed for your vehicle at a fraction the cost of what you would pay at an auto dealership. They can also tell you what type of key is in your possession and how to program it. They may even be able to give you an alternative for your lost or stolen transponder key. They can also help reprogramme the chip if it has stopped functioning. Duplicate keys No matter if they're your car keys or your house key, a majority of people have lost their keys at some point in their lives. When this happens, it's painful and uncomfortable to find yourself locked out of your car or home. It is essential to have duplicate keys to avoid this issue. These duplicates will assist you to open your lock should you ever need to get stuck. The majority of duplicate keys have an “do duplicate” message engraved or stamped on them. This is to let others know that it's illegal to duplicate a key, unless the owner of the key is present. Keys like this are commonly used for padlocks, deadbolts and other door locks. They can also be a useful tool for keeping the track of which key for a customer is which. Many people believe that the “do not duplicate” message on a key makes it more secure. However, this is not the case. The engraved message is a warning only and is not legally binding. However, it might deter some people from attempting to duplicate their keys. Some chain hardware stores refuse to cut the keys, but a locksmith can easily duplicate them. They can be cut on a blank that looks similar to the original key to ensure precision. Battery Replacement If your Lexus key fob has stopped functioning, it's likely that it will need to be reprogrammed in order to work with the vehicle's immobilizer. It is necessary to contact an locksmith or a dealer to change the ECU. Locksmiths typically cost more than the dealership, but you'll be able to avoid the headache of towing your vehicle. Apart from the ECU the battery could require replacement too. lexus car key replacement TheKeyLab 'll have to replace the old battery with one that matches your car's specific specifications. This includes the physical dimensions, terminal configuration and cold cranking amps (or amp-hour ratings). If you install an insufficient battery, it could cause serious damage to the engine as well as other components. Check the warranty before you purchase a new battery to see if the cost is covered. You may also want to consider whether you'll require an assurance in the event that the battery fails within its warranty period. It is important to keep in mind that most automotive locksmiths do not have the tools required to code keys. Therefore, you will require a dealer to program your key or make use of an online key programmer. It's also important to let them what type of key (chip smart, intelligent remote, or “push-to-start”) as well as the year of your car, and the VIN should you be able to.