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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly If you're stuck with keys that don't operate or turn on It can be frustrating. Luckily, there are simple steps you can use to fix the issue. The first step is to remove the emergency key made of metal from the key fob. Use the flat end of a metal key to press on the cover and twist it open. Keyless Entry System The keyless entry system is a wonderful convenience for any car owner. They let you unlock your car before you even touch the handle or exit the doorway for the passenger. Some even turn on the lights when you get close. Some will even open the trunk when you're carrying groceries or other electronic devices based on proximity. The key fob sends a radio frequency signal the receiver inside the car and then sends a response code back to the vehicle. The signal is valid only if the key fob is in a certain range, typically 50 feet or less. Some of these systems are one-way, which means the key fob can lock or unlock the vehicle, but cannot start the engine. It is recommended to have your keyless entry system installed by a professional, regardless of the type. A reputable locksmith for cars will assure that the connection is complete and secure, even if it means stripping a small section of each wire. The instruction manual will give you the precise wires to use and it is essential to only use the ones that are required. A remote that is keyless can also lock the doors after you leave. This is helpful for people who are forgetful and leave their car unlocked long enough. Transponder Keys Transponder keys or transponder chips are a standard feature in modern automobiles. These chips are embedded in the head of the key or fob and include an immobilizer number that is unique to each. When the key is fitted into the ignition lock cylinder and then turned to ON, a signal is sent from the antenna ring located on the top of your car's ignition to the transponder chip. The chip then sends an answer back to the antenna ring that matches the car's code. The use of a transponder chip can deter theft because the key has to be inserted correctly and have the correct code to allow your car to turn on. It's also a lot harder to duplicate the keys, making it less likely that someone could take your car. A locksmith who is reputable can create transponder keys that are programmed for your car at a fraction of what you would spend at a dealership. They can also help you understand what type of key you have and how to program it for your car. They might be able to offer you a replacement key to replace your stolen or lost transponder. They can also help you reset the chip if it is not working. Duplicate Keys A majority of people have lost their keys at some point in their lives whether it was car keys or their home keys. It can be very frustrating to be locked out of your house or car. It's essential to have duplicate keys available in order to avoid this problem. These duplicate keys are able to be used to open your lock and assist you to get inside if you're ever stuck. Most duplicate keys are engraved or stamped with a “do not duplicate” message. This is a way to let people that it's not legal to copy the key unless the owner of the key. These kinds of keys are typically used to lock padlocks, deadbolts and other door locks. These keys are also an excellent tool to keep track of which key belonging to a customer is which. Many people believe that the “do not duplicate” message on keys makes them more secure. However, this is not true. The engraved message is a warning only and does not carry any legal weight. However, lexus car key TheKeyLab could hinder some people from attempting to duplicate their key. Many chain hardware stores not cut these keys, but locksmiths can easily duplicate the keys. They can be cut on a blank that resembles as the original one to ensure the accuracy. Battery Replacement If your Lexus key fob has stopped functioning, it's likely that it will require reprogramming to work with the immobilizer system of your vehicle. It is necessary to contact a locksmith or your dealer to modify the ECU. Typically, a locksmith will cost more than a dealership, however they'll also avoid the hassle of towing your vehicle there. In addition to the ECU it's possible that your battery will also need to be changed. You'll need to replace your old battery with one that matches the specifications of your vehicle. This includes the physical size as well as the terminal configuration and amp-hour or cold cranking amps rating. If you install an insufficient battery it could cause significant damage to the engine as well as other components. Examine the warranty prior purchase a new battery, to determine if the price is covered. You'll also want to consider whether you require an insurance policy in the event that the battery fails within the warranty's time. Keep in mind that many 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 inform them know what kind of key you want (chip or intelligent remote, or “push-to-start”) and the year your car was and the VIN should you be able to.