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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 doesn't work or it won't turn on. Fortunately, there are a few steps you can use to fix the issue. First remove the emergency keys from the key fob. Then you can use the flat end of the metal key to press and twist the cover open. Keyless Entry System Keyless entry systems provide a huge benefit for any car owner. You can unlock your car when you touch the handle or get out of the door for passengers. Some even turn on the light when you get close. Others will open the trunk when carrying groceries or 10 other electronic devices based on proximity. The key fob sends an audio-frequency signal to the receiver inside the car. This receiver then sends back a response code to the vehicle. lexus key fob replacement will only be valid if the key fob is within a specified range, usually about 50 feet or less. Some of these systems function in a one-way fashion this means that the key fob is capable of locking or unlocking the car, but it is not able to start the engine. It is recommended that you have your keyless entry system installed by a professional, regardless of the type. A reputable locksmith for cars can ensure that the connection is safe and secure, even if it requires stripping a tiny portion of each wire. The manual will explain which wires to use. Another perk of keyless remote entry is that it will also lock your doors automatically when you step away from the car. This is beneficial for those who forget and tend to leave their vehicle unlocked for all day. Transponder Keys Transponder keys (or transponder chips) are a vital element in the majority of modern cars. They are embedded into the head of the key or fob and have a unique immobilizer code. When a key is fitted into the ignition lock cylinder, and then turned to ON the signal is transmitted from the antenna ring on the top of your vehicle's ignition to your transponder chip. The chip transmits an answer back to the antenna ring that matches the car's code. Transponder chips are a deterrent to theft, because the keys must be inserted correctly with the right code to turn your car on. It's also much more difficult to make a duplicate of these keys, so it's less likely that someone could take your vehicle. A reputable locksmith can produce transponder keys that are programmed to match your car at a fraction of the cost that you would pay at a dealership for cars. They can also tell you the type of key in your possession and how to program it. They may also be able to offer you an alternative for the transponder that was stolen or lost key. They may also assist you to with reprogramming the chip in case it is not working. Duplicate Keys No matter if they're your car keys or your house key, a majority of people have lost their keys at some time in their lives. When this occurs, it's difficult and frustrating to find yourself locked out of your car or home. To avoid this situation it is essential to keep duplicate keys on hand. The duplicate keys will help you unlock your lock in the event that you ever get stuck. Most duplicate keys have the “do duplicate” message engraved or stamped on the keys. This is to let others that it is illegal to copy a key unless the owner of the key is present. These keys are used for padlocks and deadbolts as as other door locks. They are also an excellent way to keep the track of which keys belong to which customer. Many people think that the “do duplicate” message on a keyboard makes it more secure. However, this is not true. The engraved message is merely a warning and does not carry any legal weight. It could deter some individuals from trying to duplicate their key. Many chain hardware shops do not cut keys. However locksmiths can easily replicate them. They can be cut on a blank that looks like the original, to ensure the accuracy. Battery Replacement If your Lexus keyfob isn't working it might need to be programmed in order that it can work with the immobilizer system in the vehicle. You'll need to go to the dealer or a locksmith who is qualified to reprogram the ECU. Typically, a locksmith will charge more than a dealership, but they'll also avoid the hassle of having to tow your vehicle there. In addition to the ECU it's possible that your battery needs to be changed. You'll have 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 rating). If you install an incorrect battery it could cause serious damage to the engine as well as other components. Before purchasing a new battery, make sure to examine the warranty to determine if it covers the cost. You may also want consider whether you'll require warranty coverage if the battery fails within its warranty period. Additionally, you must be aware that auto locksmiths aren't always equipped with the necessary tools to program keys, so you'll have to find a dealer or online key programmer to program the key for you. It's also essential to let them know the kind of key you used (chip smart fob, intelligent fob remote “push to start”), the year of your car, as well as the VIN number, if applicable.