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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 doesn't function or turn on. There are a few steps you can do to fix the issue.First remove the metal emergency keys from the key fob. Then make use of the flat end of the metal key to press and open the cover.Keyless Entry SystemKeyless entry systems provide a huge option for anyone who owns a car. You can lock your car before you touch the handle or walk out of the door of the passenger. Some even turn on the light as you approach. Others will open the trunk if you are carrying groceries or 10 other electronic devices based on proximity.The key fob transmits a radio-frequency signal to the receiver in the car. The receiver then sends back a response code back to the vehicle. lost lexus key G28 Car Keys will only be valid if the key fob is within a specific range, usually about 50 feet or less. Some of these systems work in a one-way manner, which means that the key fob is only capable of locking or unlocking the car, but not start the engine.It is recommended that you have your keyless entry system professionally installed regardless of the model. A good automotive locksmith will ensure that the connection is secure and complete, including stripping a small amount of each wire to connect it. The manual will inform you the wires you should use.Another benefit of keyless remote access is that it can also lock your doors automatically when you walk away from your car. This is helpful if aren't organized or tend to leave your car unlocked for too long.Transponder KeysTransponder keys, also known as transponder chips are an aplenty feature in modern cars. These chips are built into the head of a key or fob and include a unique code that is linked to your vehicle's immobilizer system. The antenna ring at top of the ignition sends an alert to the transponder chip when the key is inserted, and then turned on. The chip then transmits a response back to the antenna ring that matches your car's code.Transponder chips are a deterrent to theft, because the key must be properly inserted using the right code to turn your car on. It's also harder to make a duplicate of these keys, so it's less likely that someone will be able to take your car.A reputable locksmith will make transponder keys that can be programmed to match your vehicle at only a fraction of the price you'd pay at a car dealership. They can also explain what type of key is in your possession and how to program it. They may be able offer you a new key for your lost or stolen transponder. They can also help you reprogramme your chip if it's not functioning.Duplicate keysA majority of people have lost their keys at least once in their lives regardless of whether it was their keys to their car or house keys. When this happens, it's uncomfortable and frustrating to find yourself locked out of your home or vehicle. To avoid this problem it's crucial to keep duplicate keys in your possession. These duplicates can help you unlock your lock in the event that you ever find yourself stuck.Most duplicate keys have an "do duplicate" message that is stamped or engraved on the keys. This is a way of letting others know that it's legal to duplicate the key unless you're the owner of it. These keys are utilized for deadbolts and padlocks as well in other door locks. They are also great for keeping track of which key belonging to a customer is which.Many people believe that the "do duplicate" message on the keyboard makes it more secure. This isn't the case. The message on the keys is an indication of caution and doesn't have any legal weight. However, it might dissuade some people from trying to duplicate their key. A majority of chain hardware stores will not cut these keys. However locksmiths can easily replicate them. They can be cut on a blank that appears similar to the original key to ensure accuracy.Battery ReplacementIf your Lexus key fob isn't functioning, it's likely to need to be reprogrammed to work with the vehicle's immobilizer. You will need to contact a locksmith or your dealer to modify the ECU. A locksmith is likely to cost more than a dealership, however they'll also avoid the headache of having to take your car there.In addition to the ECU and the battery, it could need to be replaced also. You'll have to replace your old battery with one that's compatible with the specifications of your car. This includes the physical dimensions, terminal configuration, and amp-hour or cold cranking amps rating. If you install a defective battery it could cause significant damage to the engine and other components.Check the warranty before you buy a new battery to determine if the price is covered. You might also want to consider whether you'll require a warranty if the battery fails within the warranty period. Keep in mind that most automotive locksmiths don't have the tools required to program keys. Therefore, you will have to find a dealer to program your key or use an online key programmer. It's also important to let them what type of key you want (chip intelligent, chip, or remote "push-to-start"), the year of your car, and the VIN if you can.