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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly When you have a key fob that will not start or function properly, it can be frustrating. There are a few steps you can take to fix the problem. First take off the emergency metal keys from the key fob. Use the flat end of a key made from metal to press the cover, then twist it open. Keyless Entry System The keyless entry system is a wonderful convenience to any car owner. You can unlock your car before you touch the handle or step outside of the door of the passenger. Some even turn on lights as you approach or open the trunk, if you have it loaded with groceries, or turn on 10 other electronic accessories dependent on your proximity. The key fob transmits a radio frequency signal to the receiver inside the car which then transmits an answer code back to the vehicle. The signal is only effective when the keyfob is within a specified distance, which is typically 50 feet or less. Certain systems operate in a one-way fashion, which means that the key fob is capable of locking or unlocking the vehicle, but not start the engine. It is recommended to have your keyless entry system installed by a professional regardless of the model. A reputable locksmith for cars will make sure that the connection is secure and secure, even if that involves stripping a small portion of each wire. The manual for the instructions will show you the specific wires to use and it is vital that you only use ones needed. A remote with a keyless entry feature can also lock the doors if you leave. This is useful if you are not organized or have a tendency to leave your car locked for too long. Transponder Keys Transponder keys, also known as transponder chips are an aplenty feature of modern automobiles. These chips are integrated into the head of a fob or key and include a unique code that is linked to your vehicle's immobilizer system. When a key is placed into the ignition lock cylinder, and then turned to ON, a signal is sent from the antenna ring that is located on the top of your car's ignition to your transponder chip. The chip transmits a response back to the antenna ring that is in line with your vehicle's code. The use of a transponder chip discourages theft because the keys must be put in correctly and have the right code to allow your car to turn on. It's also a lot harder to duplicate the keys, making it less likely that someone could steal your car. A reputable locksmith can create transponder keys which can be programmed for your vehicle at a fraction the cost of what you'd pay at an auto dealership. They can also assist you to determine what kind of key you own and how to program it to match your car. They may be able offer you a replacement key to replace your stolen or lost transponder. They can also help with reprogramming the chip in case it is not functioning. Duplicate keys It doesn't matter if it's your car keys or house keys, the majority people have lost their keys at some point in their lives. When this happens, it's painful and uncomfortable to be locked out of your car or home. To avoid this problem, it's important to keep duplicate keys in your possession. These duplicates will assist you to unlock your lock if you ever find yourself stuck. Most duplicate keys are stamped or engraved with the “do not duplicate” message. This is a way of letting others know that it's legal to copy keys unless you're the owner of it. Keys like this are typically used to lock padlocks, deadbolts or other door locks. They are also an excellent way to keep track of which key belongs to the particular customer. Many people believe that the “do not duplicate” message on the key makes it more secure. But this isn't true. The message engraved on the key is only a warning and is not legally binding. It might deter some people from trying to duplicate their key. Some chain hardware stores not cut these keys, but locksmiths are able to duplicate them. They can be cut using a blank which looks as the original one to ensure accuracy. Battery Replacement If your Lexus keyfob isn't functioning it could need to be reprogrammed to ensure that it is compatible with the immobilizer system in the vehicle. You'll have to visit the dealer or a locksmith who's qualified to reprogram the ECU. A locksmith will usually charge more than the dealership, however you'll avoid the headache of towing your vehicle. In addition to the ECU it's possible that your battery will also 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 dimensions, terminal configuration, and cold cranking amps (or amp-hour rating). If you install the wrong battery it could cause significant damage to the engine and other components. Before key for lexus purchase a replacement battery, make sure to verify the warranty to determine whether it covers the cost. It is also advisable to think about whether you'll require warranty coverage if the battery fails during its warranty period. In addition, you should be aware that automotive locksmiths often don't carry the tools needed to code keys, which is why you'll need to have a dealer or an online key programmer visit and program the key for you. It's also important to tell them what type of key you want (chip or intelligent remote, or “push-to-start”) as well as the year that your car was, and the VIN if you can.