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How to Replace a Lexus Key Fob That Won't Turn On Or Work CorrectlyIt can be a hassle when your key fob will not function or turn on. There are a few steps you can take to fix the problem.The first step is to remove the emergency key made of metal from the key fob. Then utilize the flat side of the key made of metal to press and open the cover.Keyless Entry SystemThe keyless entry system can be a great convenience to any car owner. They let you unlock your car before you even touch a handle or open the doorway for the passenger. Some even turn on the light when you get close. Some will even open the trunk if you are carrying groceries or 10 other electronic devices that are based on proximity.The key fob sends an radio-frequency signal to a receiver in the car. The receiver sends back a response code back to the vehicle. The signal only works when the key fob is within a specific range, which is typically 50 feet or less. Some of these systems are one-way, which means the key fob can unlock or lock the vehicle, but cannot start the engine.No matter what type of keyless entry system you choose it is advised to have it installed by a professional. A good automotive locksmith will ensure that the connection is safe and complete, incorporating stripping a tiny portion of each wire to join it. The manual that comes with the instruction manual will give you the precise wires to use and it is vital to use only the ones you need.Another benefit of keyless remote entry is that it will also lock your doors automatically when you step away from the vehicle. This is useful for those who are forgetful and leave their car unlocked all day.Transponder KeysTransponder keys (or transponder chips) are a crucial feature in most modern cars. These chips are placed in the fobs or keys' heads and include an unique immobilizer code. The antenna ring at top of the ignition transmits a signal to the transponder chip when the key is inserted and turned ON. The chip sends an algorithm for code-matching to the antenna ring.The transponder chip deters theft because the keys must be put in correctly and must have the correct code for your car to turn on. These keys are also harder to duplicate, which makes it less likely for someone to take 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 a car dealership. They can also provide information on the type of key in your possession and how to program it. They may also be able offer you an alternative to your lost or stolen transponder key. They may also be able to help you reprogramme the chip if it is not working.lost lexus key of people have lost their keys at some point in their lives regardless of whether it was their car keys or house keys. If this happens, it's frustrating and inconvenient to be locked out of your vehicle or home. To avoid this problem, it's important to keep duplicate keys in your possession. The duplicate keys will help you unlock your lock if you ever need to get stuck.The majority of duplicate keys have an "do duplicate" message that is stamped or engraved on the keys. This is a way to let people that it's not legal to copy the key unless you're the owner of it. Keys are used to open padlocks and deadbolts as well as other door locks. They are also great for keeping track of which key belongs to which customer.Many people think that the "do duplicate" message on the keyboard can make it more secure. But, this isn't the case. The engraved message is only a warning, and does not carry any legal weight. However, it might discourage some people from trying to duplicate their keys. Many chain hardware shops do not cut keys. However, a locksmith can easily duplicate the keys. In fact, they can even be cut on a lookalike blank to ensure that the duplicate is accurate.Battery ReplacementIf your Lexus key fob has stopped functioning, it's likely to need to be reprogrammed to work with the immobilizer system of your vehicle. You will need to contact a locksmith or your dealer to change the ECU. In general, locksmiths will charge more than a dealership, however they'll save you the hassle of towing your car there.In addition to the ECU there is a chance that your battery will also need to be replaced. You'll have to replace your old battery with one that is compatible with the specifications of your vehicle. This includes the physical dimensions of the battery, the terminal configuration, and amp-hour or cold cranking amps rating. Incorrectly installed batteries can cause serious damage to your engine and other components.Before purchasing a replacement battery, be sure to look over the warranty to determine whether it covers the cost. It is also advisable to think about whether you'll require a warranty if the battery fails within its warranty period. Keep in mind that many automotive locksmiths don't have tools required to code keys. Therefore, you will have to find a dealer to program your key or employ an online key programming tool. Also, it's important to let them know what kind of key you have (chip smart fob, intelligent fob remote "push to start") and the year of your vehicle, and the VIN number, if applicable.