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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly When you have an electronic key fob that doesn't turn on or work correctly it can be a frustrating experience. Luckily, there are simple steps you can do to fix the issue. The first step is to remove the emergency key made of metal from the key fob. Make use of the flat end of a metal key to press the cover down and make it open. Keyless Entry System The keyless entry system is a great convenience for any car owner. They let you unlock your vehicle before you even touch a handle or step out of the doorway for the passenger. Some turn on the lights as you approach, open the trunk when you've loaded it with groceries, or activate 10 other electronic accessories depending on the proximity of your vehicle. The key fob sends an audio frequency signal to the car's receiver which then transmits an answer code back to the vehicle. The signal only works only if the keyfob falls within a specified range, which is usually 50 feet or less. Some of these systems function in a one-way manner meaning that the key fob is capable of locking or unlocking the vehicle, but not start the engine. Whatever keyless entry system you choose it is recommended to have it professionally installed. A professional locksmith in the automotive industry will ensure that the connection is solid and secure, as well as stripping a small portion of each wire in order to connect it. The manual for the instructions will show you the specific wires to use and it is vital to only use the ones you need. A remote with a keyless entry feature can also lock the doors if you walk away. This is a great feature for those who forget and leave their car unlocked all day. Transponder Keys Transponder keys or transponder chips are a standard feature in modern vehicles. The chips are incorporated into the fobs or keys' heads and include a unique immobilizer code. The antenna ring at the top of the ignition sends signals to the transponder chip when the key is inserted and switched ON. The chip transmits an appropriate code-matching response to the antenna ring. Transponder chips discourage theft, because the keys must be inserted correctly with the proper code to turn your car on. The keys are also much harder to duplicate, which makes it less likely that someone will steal your vehicle. A reputable locksmith can create transponder keys which are programmed for your car at a fraction the cost of what you would pay at an auto dealer. They can also help identify the type of key you own and how to program it for your car. They may be able offer you a new key to replace your stolen or lost transponder. They may also be able to assist you reprogramme your chip if it's stopped functioning. Duplicate Keys If it's your car key or house keys, the majority people have lost their keys at some point in their lives. It's frustrating to be locked out of your home or vehicle. To avoid this situation, it's important to keep duplicate keys on hand. These duplicate keys are able to be used to open your lock and help get inside if you're ever stuck. Most duplicate keys feature an “do duplicate” message stamped or engraved on them. This is to let others know that it is not legal to duplicate a key without the permission of the owner. These kinds of keys are often used for padlocks, deadbolts, and other door locks. They are also an excellent method of keeping the track of which keys belong to which customer. Many people believe that the “do not duplicate” message on keys makes them more secure. This isn't the case. The engraved message is only a warning, and is not legally binding. It could deter some individuals from attempting to duplicate their keys. Many chain hardware stores not cut keys, but locksmiths are able to duplicate them. In fact, they can be cut with a lookalike blank to ensure that the duplicate is authentic. Battery Replacement If your Lexus keyfob is not working it may need be reprogrammed so that it works with the immobilizer system of the vehicle. You'll have to visit the dealer or contact a locksmith who's qualified to reprogram the ECU. A locksmith is likely to charge more than a dealership, but they'll save you the burden of having to tow your vehicle there. In addition to the ECU It is also possible that your battery may need to be changed. You'll need to replace your old battery with a new one that matches the specifications of your car. This includes the physical size as well as the 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. Make sure to check the warranty prior to purchase a new battery, to see if the cost is covered. Highly recommended Internet page may also want to think about whether you'll require a warranty if the battery fails during its warranty. In addition, you should keep in mind that car locksmiths aren't always equipped with the tools required to code keys, so you'll have to either have a dealer or a web-based key programmer to program the key for you. It's also essential to inform them know what kind of key you want (chip, intelligent remote, or “push-to-start”) as well as the year of your car, and the VIN in the event that you can.