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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. Luckily, there are simple steps you can take to fix the problem. First remove the emergency keys from the key fob. Then, use the flat end of the key made of metal to press and open the cover. Keyless Entry System Keyless entry systems are an excellent convenience for anyone who drives. They allow you to unlock your vehicle before you even reach a handle or walk out of the passenger door. Some even turn on the light when you get close. Others will open the trunk if you are carrying your groceries or 10 other electronic devices based on proximity. The key fob sends radio-frequency signals to the receiver in the car. lexus key replacement sends back an appropriate response code to the vehicle. The signal will only be valid if the key fob is within a specific area, usually 50 feet or less. Some of these systems are one-way, meaning the key fob will secure or unlock the vehicle, but it is not able to start the engine. Whatever keyless entry system that you choose it is advised to have it professionally installed. A reputable locksmith will ensure that the connection is safe and complete, incorporating stripping a small amount of each wire before connecting it. The instruction manual will show you the specific wires to use and it is essential that you only use ones that are required. Another perk of keyless remote entry is that it can also lock your doors automatically when you walk away from your car. This is beneficial for those who are forgetful and often leave their vehicle unlocked for long enough. Transponder Keys Transponder keys or transponder chips are an aplenty feature of modern automobiles. The chips are incorporated into the head of a fob or key and contain a unique number that is linked to your vehicle's immobilizer system. When the key is inserted into the ignition lock cylinder and turned to ON the signal is transmitted from the antenna ring that is located on the top of your car's ignition to your transponder chip. The chip transmits an answer back to the antenna ring that matches your car's code. Transponder chips deter theft, because the keys has to be inserted correctly and with the right code to turn your car on. They are also more difficult to duplicate, making it less likely that someone will steal your vehicle. A reputable locksmith can create transponder keys which can be programmed to your vehicle at a fraction the cost of what you would spend at a dealership. They can also assist you to understand what type of key you have and how to program it for your vehicle. They might even be able to give you a new key to replace your stolen or lost transponder. They may also be able to assist to reprogramme the chip if it's stopped 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 time in their lives. It can be very frustrating to be locked out of your home or car. To avoid this issue it's essential to have duplicate keys in your possession. These duplicates can help you unlock your lock in the event that you ever get stuck. The majority of duplicate keys are stamped or engraved with a “do not duplicate” message. This is a way of letting others know that it's legal to copy keys unless you're the owner of the key. Keys are used for deadbolts and padlocks as well with other door locks. These keys are also great for keeping the track of which key for a customer is which. Many people think that the “do duplicate” message on a keyboard can make it more secure. However, this is not the case. The message engraved on the key is only a warning and does not carry any legal weight. However, it may discourage some people from trying to duplicate their key. Many chain hardware shops will not cut these keys. However locksmiths are able to duplicate them. They can be cut on a blank that looks similar to the original key to ensure accuracy. Battery Replacement If your Lexus keyfob isn't working it could need to be reprogrammed in order that it is compatible with the immobilizer system of your vehicle. You'll need to contact a locksmith or your dealer to change the ECU. Typically, a locksmith will 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 there is a chance that your battery will also need to be changed. It is necessary to replace your old battery with one that is compatible with the specifications of your car. This includes the physical dimensions, terminal configuration, as well as cold cranking amps (or amp-hour rating). If you install the wrong battery, it could cause severe damage to your engine as well as other components. Before purchasing a new battery, be sure to look over the warranty to determine if it covers the cost. You'll also want to consider whether you need a warranty in case the battery fails within its warranty period. Keep in mind that many automotive locksmiths do not have tools needed to code keys. So, you'll have to find a dealer to program your key or utilize an online key programmer. It is also important to inform them about the kind of key you had (chip, intelligent fob, remote “push to start”) and the year of your vehicle, and the VIN number, if applicable.