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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 doesn't work or will not turn on. There are a few easy steps that you can follow to solve the problem. The first step is to remove the emergency key made of steel from the key fob. Then, use the flat end of the key's metal end to press and twist the cover open. Keyless Entry System The keyless entry system can be a great convenience to any car owner. You can unlock your car before you touch the handle or leave the door for the passenger. Some of them will even turn on the light when you get close. Others will open the trunk when carrying groceries, or any other electronic devices based on proximity. The key fob sends an audio-frequency signal to the receiver inside the car. The receiver sends back a response code to the vehicle. The signal only works if the keyfob 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. Regardless of the type of keyless entry system you select it is recommended to have it professionally installed. A good automotive locksmith will make sure the connection is secure and complete, including stripping a tiny portion of each wire before connecting it. The manual will explain which wires to use. Another perk of keyless remote access is that it can also lock your doors automatically when you step away from your vehicle. This is a great feature for those who are forgetful and are prone to leaving their vehicle unlocked for too long. Transponder Keys Transponder keys (or transponder chips) are an important feature in modern vehicles. These chips are integrated into the head of a fob or key and contain a unique code that is linked to your vehicle's immobilizer system. When the key is fitted into the ignition lock cylinder and then turned to ON it transmits a signal from the antenna ring that is located on the top of your vehicle's ignition to your transponder chip. The chip then sends a response back to the antenna ring that matches the car's code. The use of a transponder chip deters theft because the key must be inserted correctly and have the correct code to allow your car to turn on. It's also much more difficult to duplicate the keys, which makes it less likely that someone can steal your car. A locksmith who is reputable can create transponder keys that can be programmed for your vehicle at a fraction the cost of what you would pay at an auto dealership. They can also help you understand what type of key is in your possession and how to program it. They might be able to provide you a replacement key for your stolen or lost transponder. replacement lexus car keys may even be able to help you reprogramme your chip if it's not functioning. Duplicate keys It doesn't matter if it's your car keys or house keys, the majority people have lost their keys at some point in their lives. When this happens, it can be uncomfortable and frustrating to be locked out of your car or home. It is important to have two keys in order to avoid this issue. These duplicates are able to be used to open your lock and help get inside in the event that you're in a jam. Most duplicate keys come with a “do duplicate” message that is stamped or engraved on them. This is a way to let others know that it's legal to copy the key unless you are the owner of it. These types of keys are commonly used for padlocks, deadbolts, and other door locks. They are also great for keeping track of which key belongs to the particular customer. Many people believe that the “do not duplicate” message on keys makes them more secure. This isn't the case. The message on these keys is an alert and does not have any legal value. However, it might discourage some people from trying to duplicate their key. Many chain hardware shops will not cut these keys. However locksmiths are able to replicate them. In fact, they can even be cut on a lookalike blank to ensure that the duplicate is correct. Battery Replacement If your Lexus keyfob is not working it may need be programmed in order that it is compatible with the immobilizer feature of the vehicle. You'll have to visit the dealer or a locksmith that is certified to reprogram the ECU. A locksmith is likely to charge more than a dealership, but they'll also save you the hassle of having to tow your vehicle there. In addition to the ECU It is also possible that your battery will need to be replaced. You'll need to replace the old battery with a new one that matches the specifications of your vehicle. This includes the physical dimensions, terminal configuration, and cold cranking amps (or amp-hour ratings). If you install a defective battery it could cause severe damage to the engine and other components. Before purchasing a replacement battery, examine the warranty to determine if it covers the cost. You may also want to think about whether you'll require warranty coverage if the battery fails within its warranty. Also, keep in mind that many automotive locksmiths do not have the tools necessary to code keys. So, you'll require a professional to program your key or utilize an online key programmer. It's also essential to inform them about the kind of key you had (chip or intelligent fob, remote “push to start”) as well as the year of your car, and the VIN number, if you can.