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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 turn on or work correctly, it can be frustrating. There are a few simple steps that you can follow to solve the problem. First remove the emergency keys from the key fob. Then, use lexus replacement key thekeylab.co.uk of the key to press and twist the cover open. Keyless Entry System Keyless entry systems are an excellent convenience for any car owner. They let you unlock your car before you even reach a handle or walk out of the passenger door. Some of them will even turn on the lights when you get close. Others will open the trunk when you are carrying groceries, or any other electronic devices based on proximity. The key fob transmits a radio frequency signal to the car's receiver and then sends a response code back to the vehicle. The signal is only valid if the key fob is within a certain range, typically 50 feet or less. Some of these systems are one-way, meaning the key fob will unlock or lock the vehicle, but is not able to start the engine. It is recommended to have your keyless entry system installed by a professional, regardless of the type. A reputable locksmith will make sure the connection is safe and complete, incorporating stripping a tiny portion of each wire in order to connect it. The manual for the instructions will provide you with the exact wires to use and it is essential that you only use ones you need. Another perk of keyless remote access is that it can also lock your doors automatically when you walk away from the car. This is helpful for people who are forgetful and are prone to leaving their car unlocked long enough. Transponder Keys Transponder keys, also known as transponder chips are an aplenty feature in modern cars. They are embedded in the head of a fob or key and have a unique code which is linked to the car's immobilizer system. When the key is inserted into the ignition lock cylinder and turned to ON and a signal is sent from the antenna ring on the top of your car's ignition to the transponder chip. The chip transmits an answer back to the antenna ring that matches the car's code. The use of a transponder chip discourages theft because keys must be placed correctly and have the correct code to allow your car to turn on. The keys are also much harder to duplicate, making it less likely for someone to steal your vehicle. A reputable locksmith can produce transponder key copies that can be programmed to match your car at only a fraction of the price that you have to pay at a car dealership. They can also assist you figure out what type of key you own and how to program it for your vehicle. They might be able to offer you a new key to replace your stolen or lost transponder. They may also be able to help you reset the chip if it is not working. Duplicate keys No matter if they're your car keys or house key, most people have lost their keys at some time in their lives. When this occurs, it's frustrating and inconvenient to be locked out of your home or vehicle. It is essential to have duplicate keys available in order to avoid this situation. These duplicates can be used to unlock your lock and allow you to gain access if you're in a pinch. Most duplicate keys feature an “do duplicate” message stamped or engraved on them. This is a way of letting others know that it's not legal to copy the key unless you're the owner of it. Keys like this are commonly used for padlocks, deadbolts and other door locks. They can also be a useful tool for keeping an eye on which key of the customer is which. Many people believe that the “do duplicate” message on the keyboard is a way to make it more secure. However, this is not the case. The message engraved on the key is only a warning, and is not legally binding. It could deter some individuals from attempting to duplicate their key. Most chain hardware stores will not cut these keys. However locksmiths are able to duplicate the keys. They can be cut using a blank which looks like the original, to ensure precision. Battery Replacement If your Lexus key fob isn't functioning, it's likely to need to be reprogrammed in order to work with the immobilizer system of your vehicle. You'll need to visit the dealer or a locksmith who is qualified to reprogram the ECU. In general, locksmiths will cost more than a dealership, however they'll also avoid the hassle of towing your vehicle there. Aside from the ECU and the battery, it could need to be replaced as well. You'll need to replace the old battery with a new one that matches your car's specific specifications. This includes the physical size, terminal configuration, as well as amp-hour rating or cold cranking rating. If you install an incorrect battery, it could cause serious damage to the engine as well as other components. Before purchasing a new battery, check the warranty to see whether it covers the cost. It is also important to determine whether you need a warranty in case the battery fails during its warranty time. Additionally, you must be aware that auto locksmiths usually don't have the tools needed to code keys, which is why you'll need to find an online or dealer key programmer to program the key for you. Also, it's important to let them know what kind of key you had (chip smart fob, intelligent fob remote “push to start”), the year of your vehicle, and the VIN number, if you can.