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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly If you've got a key fob that won't start or function properly It can be frustrating. Luckily, there are simple 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 on the cover and turn it to open. Keyless Entry System The keyless entry system is a huge option for anyone who owns a car. They allow you to unlock your vehicle before you even reach a handle or exit the passenger door. Some even turn on the light when you get close. Others will open the trunk if you are carrying your groceries or 10 other electronic devices that are based on proximity. The key fob transmits an audio-frequency signal to the receiver inside the car. The receiver sends back an answer code to the vehicle. The signal is valid only when the key fob is within a certain range, usually about 50 feet or less. Some of these systems are one-way, which means the key fob will unlock or lock the vehicle, but it can't start the engine. It is recommended that you have your keyless entry system professionally installed, regardless of the type. A professional locksmith in the automotive industry will make sure the connection is safe and complete, which includes stripping a tiny portion of each wire to connect it. The instruction manual will provide you with the exact wires to use and it is vital to use only the ones required. A remote with a keyless entry feature can also lock the doors after you leave. This is a great feature if are not organized or tend to leave the car unlocked for too long. Transponder Keys Transponder keys (or transponder chips) are an important feature in modern vehicles. The chips are incorporated into the head of a fob or key and contain a unique code that is linked to your vehicle's immobilizer system. When the key is put into the ignition lock cylinder and turned to ON it transmits a signal from the antenna ring that is located on the top of your car's ignition to your transponder chip. The chip transmits an encoding response to the antenna ring. The use of a transponder chip can deter theft because keys must be placed correctly and must have the correct code to allow your car to turn on. The keys are also much harder to duplicate, which makes it less likely for someone to steal your vehicle. A locksmith who is reputable can create transponder keys which are programmed for your car at a fraction the cost of what you'd spend at a dealership. They can also help you understand what type of key you have and how to program it to your car. They may be able offer you a new key for your lost or stolen transponder. They can even help you reprogramme your chip if it's not working. Duplicate Keys Many people have lost keys at some time in their lives, whether it was their car keys or their home keys. It's frustrating to be locked out of your car or home. It is essential to have duplicate keys on hand to avoid this issue. The duplicate keys will help you unlock your lock in the event that you ever find yourself stuck. The majority of duplicate keys are engraved or stamped with the “do not duplicate” message. This is a way to let the public that it is not legal to copy the key unless you are the owner of it. Keys of this kind are typically used to lock padlocks, deadbolts and other door locks. These keys are also great for keeping the track of which key for a customer is which. Many people think that the “do duplicate” message on the keyboard can make it more secure. However, this isn't the case. The engraved message is only a warning, and has no legal weight. It could discourage some from attempting to duplicate their key. Most chain hardware stores do not cut keys. However, a locksmith can easily replicate the keys. In fact, they can even be cut using a replica blank to ensure that the duplicate is correct. Battery Replacement If your Lexus key fob isn't functioning, it's likely that it will require reprogramming to work with the vehicle's immobilizer system. You will need to contact a locksmith or visit your dealer to modify the ECU. Locksmiths usually charge more than the dealership, but you'll be able to avoid the hassle of towing your car. In lexus key replacement near me to the ECU it's possible that your battery will need to be changed. You'll be required to replace the previous battery with one that matches your car's specific specifications. This includes the physical dimensions, terminal configuration and cold cranking amps (or amp-hour rating). Installing the wrong battery can cause serious damage to your engine and other components. Make sure to check the warranty prior to purchase a new battery, to see if the cost is covered. It is also important to determine whether you require a warranty in the event that the battery fails within its warranty time. In addition, you should be aware that automotive locksmiths often don't carry the necessary tools to program keys, and you'll have to either have an online or dealer key programmer come and program the key for you. It's also important to let them know what kind of key you want (chip or intelligent, or remote “push-to-start”) and the year of your car, and the VIN in the event that you can.