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How to Replace a Lexus Key Fob That Won't Turn On Or Work CorrectlyIf you've got keys that don't turn on or work correctly it can be very frustrating. Fortunately, there are a few steps you can use to fix the issue.The first step is to remove the emergency key in metal from the key fob. Then make use of the flat end of the key made of metal to press and open the cover.Keyless Entry SystemThe keyless entry system can be a great convenience for any car owner. They allow you to unlock your vehicle before you even reach a handle or walk out of the passenger door. Some of them will even turn on the light as you approach. Others will open the trunk when you're carrying groceries or 10 other electronic devices that are based on proximity.The key fob sends a radio-frequency signal to the receiver in the car. The receiver then sends back a response code to the vehicle. The signal is only valid when the key fob is within a specific distance, typically 50 feet or less. lexus key fob replacement of these systems function in a one-way manner meaning that the key fob will only be capable of locking or unlocking the car, but it is not able to 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 ensure that the connection is secure and complete, including stripping a small portion of each wire to join it. The manual for the instructions will give you the precise wires to use and it is vital to only use the ones you need.Another perk of keyless remote access is that it could also lock your doors automatically when you walk away from your car. This is a great feature for those who forget and are prone to leaving their car unlocked long enough.Transponder KeysTransponder keys (or transponder chips) are an important feature in most modern cars. They are embedded in the head of a key or fob and contain a unique number that's linked to your car's immobilizer system. When the key is inserted into the ignition lock cylinder and then turned to ON and a signal is sent from the antenna ring on the top of your car's ignition to your transponder chip. The chip then sends an answer back to the antenna ring that matches the car's code.Transponder chips prevent theft as the key must be inserted correctly with the correct code to turn your car on. It's also harder to make a duplicate of the keys, which makes it less likely that someone can steal your vehicle.A reputable locksmith can create transponder keys that can be programmed to match your car at less than the price that you would pay at a car dealership. They can also assist you understand what type of key you have and how to program it for your car. They may also be able to offer you an alternative to your lost or stolen transponder key. They may also assist you to with reprogramming the chip in case it has stopped functioning.Duplicate KeysThe majority of people have lost keys at one point or another in their lives whether it was car keys or their home keys. When this happens, it's frustrating and inconvenient to be locked out of your vehicle or home. It is important to have two keys to avoid this issue. These duplicates can be used to unlock your lock and assist you to get inside in the event that you're in a jam.The majority of duplicate keys are engraved or stamped 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. These keys are utilized for padlocks and deadbolts as in other door locks. They are also an excellent tool to keep track of which customer's key is which.Many people believe that the "do duplicate" message on a keyboard is a way to make it more secure. But, this isn't the case. The engraved message is a warning only and is not legally binding. It could discourage some from trying to duplicate their keys. Many chain hardware stores refuse to cut the keys, but locksmiths are able to duplicate them. They can be cut using a blank which looks as the original one to ensure the accuracy.Battery ReplacementIf your Lexus keyfob isn't functioning it may need be reprogrammed in order that it can work with the immobilizer system of the vehicle. You'll have to visit the dealer or a locksmith that is certified to reprogram the ECU. Typically, a locksmith will charge more than a dealership, but they'll also save you the hassle of having to tow your car there.In addition to the ECU the battery could need to be replaced also. You'll need to replace your old battery with one that is compatible with the specifications of your car. This includes the physical dimensions, terminal configuration and cold cranking amps (or amp-hour ratings). Incorrectly installed batteries can cause severe damage to your engine as well as other components.Before you purchase a replacement battery, be sure to examine the warranty to determine if it covers the cost. You might also want to think about whether you'll require an assurance in the event that the battery fails within its warranty period. In addition, you should keep in mind that automotive 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 come in and program the key for you. Also, you should inform them about the kind of key you used (chip or intelligent fob remote "push to start") and the year of your car, as well as the VIN number, if applicable.