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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly If you're stuck with a key fob that won't operate or turn on, it can be frustrating. There are a few easy steps that you can follow to solve the issue. The first step is to remove the emergency key in metal from the key fob. Utilize the flat side of a key in metal to press on the cover and twist it open. Keyless Entry System Keyless entry systems provide a huge convenience for any car owner. They let you unlock your vehicle before you even touch a lever or walk out of the doorway for the passenger. Some even turn on the lights as you approach or open the trunk if it's filled with groceries, or activate 10 other electronic devices in response to your proximity. lexus key sends the radio frequency signal to the receiver inside the car and then sends a response code back to the vehicle. The signal will only be valid if the key fob is within a specific range, usually about 50 feet or less. Some of these systems are one-way, which means the key fob will secure or unlock the vehicle, but can't start the engine. It is recommended that you have your keyless entry system professionally installed, regardless of the type. A reliable locksmith in the automotive sector can make sure that the connection is safe and secure, even if that requires stripping a tiny portion of each wire. The manual will explain which wires you need to use. A keyless remote entry can also secure the doors when you leave. This is useful if you aren't organized or tend to leave your car unlocked for too long. Transponder Keys Transponder keys (or transponder chips) are an important feature in modern vehicles. They are embedded into the head of keys or fobs and come with an unique immobilizer code. When a key is fitted into the ignition lock cylinder, and then turned to ON, a signal is sent from the antenna ring on the top of your car's ignition to the transponder chip. The chip then transmits an answer back to the antenna ring that matches your car's code. Transponder chips discourage theft, because the key must be properly inserted using the proper code to turn your car on. The keys are also much harder to duplicate, making it less likely for someone to take your car. A reliable locksmith can create transponder keys that can be programmed to your vehicle at a fraction of what you'd pay at an auto dealership. They can also assist you identify the type of key you own and how to program it to your car. They may be able offer you a replacement key for your stolen or lost transponder. They may even be able to help to reprogramme the chip if it's stopped functioning. Duplicate keys It doesn't matter if it's your car keys or house key, most people have lost their keys at some time in their lives. It's frustrating to be locked out of your home or car. To avoid this situation it is essential to keep duplicate keys in your possession. These duplicates can be used to unlock your lock and help you get inside if you're ever stuck. The majority of duplicate keys are stamped or engraved with a “do not duplicate” message. This is a way to let others know that it's not legal to duplicate keys unless you're the owner of the key. Keys of this kind are commonly used for padlocks, deadbolts or other door locks. They are also an excellent way to keep the track of which keys belong to the particular customer. Many people think that the “do duplicate” message on a keyboard is a way to make it more secure. But, this isn't true. The message engraved on these keys is merely an indication and does not carry any legal weight. It could discourage some from trying to duplicate their key. A majority of chain hardware stores will not cut these keys. However, a locksmith can easily replicate them. In fact, they can even be cut on a similar blank to ensure that the duplicate is exact. Battery Replacement If your Lexus keyfob is not working it may need be reprogrammed in order that it works with the immobilizer feature of the vehicle. You will need to contact a locksmith or visit your dealer to change the ECU. Most locksmiths cost more than a dealership, but they'll also spare you the headache of having to take your car there. In addition to the ECU, your battery may require replacement also. It is necessary to replace your old battery with one that's compatible with the specifications of your vehicle. This includes the physical dimensions, terminal configuration, as well as cold cranking amps (or amp-hour rating). Installing the wrong battery can cause severe damage to your engine as well as other components. Before purchasing a new battery, be sure to check the warranty to see whether it covers the cost. Also, you should consider whether you require a warranty in the event that the battery fails within the warranty's time. Keep in mind that a lot of automotive locksmiths don't have tools necessary to code keys. So, you'll need to hire a dealer to program your key or utilize an online key programmer. It's also important to let them what type of key (chip smart, intelligent remote, or “push-to-start”), the year your car was and the VIN should you be able to.