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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly It can be very frustrating when your keypad won't function or switch off. Luckily, there are easy steps you can do to fix the issue. First remove the metal emergency keys from the key fob. Utilize the flat side of a key made of metal to press the cover, then twist it open. Keyless Entry System Keyless entry systems are an excellent option for anyone who owns a car. They let you unlock your car before you even reach a handle or step out of the passenger door. Some of them even turn on the lights when you approach and open the trunk in case you've filled it with groceries, or turn on 10 other electronic devices in response to your proximity. The key fob sends the radio frequency signal to the receiver inside the car, which in turn sends a response code back to the vehicle. The signal only works when the key fob is within a particular area, usually 50 feet or less. Some of these systems function in a one-way way meaning that the key fob is only able to lock or unlock the vehicle, but not start the engine. Regardless of the type of keyless entry system that you choose it is advised to have it installed by a professional. A reputable locksmith for cars will ensure that the connection is safe and secure, even if it means stripping a small section of each wire. lexus spare key will inform you the wires you should use. A remote that is keyless can also secure the doors when you leave. This is beneficial for those who forget and leave their vehicle unlocked for long enough. Transponder Keys Transponder keys, also known as transponder chips are a standard feature in modern automobiles. These chips are placed in the head of keys or fobs and come with an unique immobilizer code. The antenna ring on the top of the ignition sends a signal to the transponder chip when the key is inserted and turned on. The chip transmits an encoding response to the antenna ring. The use of a transponder chip can deter theft because the keys must be put in correctly and must have the correct code to enable your car turn on. It's also harder to make a duplicate of the keys, making it less likely that someone will be able to take your car. A locksmith who is reputable can create transponder keys that are programmed for your car at a fraction of what you'd spend at a dealership. They can also explain what type of key is in your possession and how to program it. They might be able to offer you a new key to replace your stolen or lost transponder. They may also assist you to with reprogramming the chip in case it is not working. Duplicate keys The majority of people have lost keys at least once in their lives, whether it was their keys to their car or house keys. It can be very frustrating to be locked out of your car or home. To avoid this it's essential to have duplicate keys on hand. These duplicates will assist you to open your lock if you ever need to get stuck. Most duplicate keys come with the “do duplicate” message engraved or stamped on them. This is a way to let others know that it's legal to copy the key unless you're the owner of it. Keys of this kind are commonly used for padlocks, deadbolts, and other door locks. They are also an excellent method of keeping track of which keys belong to the particular customer. Many people believe that the “do duplicate” message on a keyboard is a way to make it more secure. But, this isn't true. The engraved message on these keys is a warning and does not have any legal value. It may discourage some people from attempting to duplicate their keys. A majority of chain hardware stores do not cut keys. However, a locksmith can easily duplicate the keys. In fact, they could be cut with a lookalike blank to ensure that the duplicate is correct. Battery Replacement If your Lexus keyfob is not working it might need to be reprogrammed to ensure that it is compatible with the immobilizer feature of the vehicle. You'll need to visit the dealer or an experienced locksmith who can reprogram the ECU. A locksmith will usually charge more than the dealership, however you'll save yourself the hassle of towing your car. In addition to the ECU, it is possible that your battery will need to be replaced. You'll need to replace the old battery with one that meets the specifications of your car. This includes the physical dimensions, terminal configuration, and cold cranking amps or amp-hour rating. Installing the wrong battery can cause severe damage to your engine as well as other components. Before purchasing a replacement battery, be sure to examine the warranty to determine whether it covers the cost. You should also consider whether you need an insurance policy in the event that the battery fails within its coverage period. In addition, you should be aware that automotive locksmiths aren't always equipped with the tools required to code keys, so you'll have to have a dealer or online key programmer come and program the key for you. It's also important to inform them know what kind of key (chip or intelligent remote, or “push-to-start”) as well as the year of your car, and the VIN If you have it.