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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly It can be a hassle when your key fob won't function or turn on. There are a few simple steps you can take to fix the issue. The first step is to remove the emergency key made of steel from the key fob. Then, use the flat end of the key's metal end to press and twist the cover open. Keyless Entry System Keyless entry systems provide a huge option for anyone who owns a car. They allow you to unlock your vehicle before you even touch a handle or exit the doorway for the passenger. Some of them even turn on the lights when you approach or open the trunk, in case you've filled it with groceries, or turn on 10 other electronic devices depending on the proximity of your vehicle. The key fob transmits the radio frequency signal to the car's receiver, which in turn sends a response code back to the vehicle. The signal is only valid if the key fob is within a specified range, usually about 50 feet or less. Some of these systems are one-way, which means the key fob is able to lock or unlock the vehicle, but cannot start the engine. Whatever keyless entry system you choose It is recommended to have it professionally installed. A good automotive locksmith will assure that the connection is completely and secure, even if that requires stripping a tiny portion of each wire. The manual for the instructions will show you the specific wires to use, and it is important that you only use ones you need. Another benefit of keyless remote entry is that it will also lock your doors automatically when you walk away from your vehicle. This is helpful if are not organized or tend to leave the car unlocked for too long. Transponder Keys Transponder keys (or transponder chips) are a vital feature of modern automobiles. They are embedded into the head of keys or fobs and contain an immobilizer number that is unique to each. When the key is inserted into the ignition lock cylinder and turned to ON and a signal is sent from the antenna ring that is located on the top of your vehicle's ignition to the transponder chip. The chip sends an algorithm for code-matching to the antenna ring. Transponder chips are a deterrent to theft, because the keys must be inserted correctly with the correct code to turn your car on. It's also harder to duplicate the keys, which makes it less likely that someone can take your vehicle. A reputable locksmith can make transponder key copies that are programed to match the car you own at only a fraction of the price that you pay at a dealership for cars. They can also provide information on what type of key is in your possession and how to program it. They may be able offer you a new key to replace your stolen or lost transponder. They can also help you reprogramme your chip if it's not working. Duplicate keys Most people have lost keys at one point or another in their lives regardless of whether it was their car keys or house keys. When this happens, it's painful and uncomfortable to be locked out of your home or car. To avoid this problem it is essential to keep duplicate keys on hand. These duplicates will assist you to unlock your lock in the event that you ever find yourself stuck. replacement lexus car keys The Keylab come with an “do duplicate” message stamped or engraved on them. This is a way of letting others know that it's legal to duplicate the key unless the owner of it. These kinds of keys are usually used to open padlocks, deadbolts, and other door locks. They are also a great tool 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 true. The message engraved on the keys is a warning and does not have any legal weight. However, it may dissuade some people from trying to have their key duplicated. Some chain hardware stores not cut these keys, however locksmiths are able to duplicate them. They can be cut on a blank that resembles similar to the original key to ensure the accuracy. Battery Replacement If your Lexus key fob has stopped working, it's likely require reprogramming to work with the vehicle's immobilizer. It is necessary to contact a locksmith or visit your dealer to reprogram the ECU. Locksmiths usually charge more than the dealership, but you'll avoid the headache of towing your vehicle. Aside from the ECU your battery may require replacement as well. You'll be required to replace the previous battery with one that matches the specifications of your vehicle. This includes the physical dimensions, terminal configuration, and cold cranking amps (or amp-hour rating). If you install an incorrect battery it could cause serious damage to the engine as well as other components. Verify the warranty prior to you purchase a new battery, to determine if the price is covered. You may also want to consider whether you'll need warranty coverage if the battery fails during its warranty period. Also, keep in mind that automotive locksmiths usually don't have the tools needed to code keys, so you'll have to get an online or dealer key programmer come in and program the key for you. It is also important to let them know what kind of key you have (chip, intelligent fob, remote “push to start”) as well as the year of your car, and the VIN number if possible.