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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly If you've got keys that don't turn on or work correctly it can be a frustrating experience. There are simple steps you can follow to solve the issue. The first step is to take the emergency key made of steel from the key fob. Then you can use the flat end of the metal key to press and twist the cover open. Keyless Entry System The keyless entry system is a wonderful convenience for any car owner. They allow you to unlock your vehicle before you even touch a handle or exit the passenger door. Some of them will even turn on the lights as you approach. Others will open the trunk if you are carrying groceries or 10 other electronic devices that are based on proximity. The key fob transmits an audio frequency signal to the car's receiver and then sends an answer code back to the vehicle. The signal only works when the keyfob is within a specific range, which is usually 50 feet or less. Certain systems work in a single-way mode which means that the key fob is only able to lock or unlock the vehicle, but not start the engine. Regardless of the type of keyless entry system that you choose, it is recommended to have it installed by a professional. A professional locksmith in the automotive industry can assure that the connection is completely and secure, even if it means stripping a small section of each wire. The manual for the instructions will provide you with the exact wires to use and it is essential to only use the ones needed. A keyless remote entry can also lock the doors if you leave. This is helpful if are prone to forgetfulness or have a tendency to leave your car locked for too long. Transponder Keys Transponder keys or transponder chips are an aplenty feature of modern automobiles. lexus key fob replacement are placed in the head of keys or fobs and contain a unique immobilizer code. When a key is put into the ignition lock cylinder and turned to ON the signal is transmitted from the antenna ring located on the top of your vehicle's ignition to your transponder chip. The chip sends an appropriate code-matching response to the antenna ring. The transponder chip is a deterrent to theft since the key must be inserted correctly and contain the correct code to allow your car to turn on. They are also more difficult to duplicate, which makes it less likely that someone will take your car. A reputable locksmith can create transponder key copies that can be programmed to work with your car at just a fraction of the cost that you have to pay at a car dealership. They can also explain the type of key in your possession and how to program it. They might be able to provide you a replacement key for your lost or stolen transponder. They can also help in reprogramming the chip if it is not functioning. Duplicate Keys The majority of people have lost keys at one point or another in their lives, whether it was their car keys or their home keys. It can be frustrating to be locked out of your house or car. It's important to have duplicate keys available in order to avoid this problem. These duplicate keys can be used to open your lock and allow you to get inside if you're ever in a jam. The majority of duplicate keys have an “do duplicate” message stamped or engraved on the keys. This is to let others know that it's illegal to duplicate keys unless they are the owner. These keys are utilized for deadbolts and padlocks as well for other door locks. These keys are also great for keeping the track of which key for a customer is which. Many people believe that the “do not duplicate” message on keys makes them more secure. However, this is not the case. The message that is engraved on the keys is an indication and does not have any legal significance. However, it could discourage some people from trying to duplicate their keys. Some chain hardware stores refuse to cut the keys, but locksmiths are able to duplicate them. In fact, they can even be cut with a lookalike blank to ensure that the duplicate is correct. Battery Replacement If your Lexus key fob isn't functioning, it's likely that it will need to be reprogrammed in order to work with the vehicle's immobilizer. You'll have to go to the dealer or an experienced locksmith who can reprogram the ECU. Locksmiths typically charge more than the dealership, however you'll save yourself the hassle of towing your car. Apart from the ECU your battery may need to be replaced as well. You'll be required to replace the previous battery with one that meets the specifications of your car. This includes the physical size, terminal configuration, and amp-hour or cold cranking amps rating. Installing the wrong battery can cause serious damage to your engine as well as other components. Before purchasing a replacement battery, check the warranty to see if it covers the cost. You'll also want to consider whether you need an assurance in case the battery fails during its warranty time. Also, keep in mind that car locksmiths usually don't have the tools needed to code keys, so you'll need to get an online or dealer key programmer visit and program the key for you. It's also important to inform them know the type of key (chip or intelligent, or remote “push-to-start”) and the year your car was, and the VIN If you have it.