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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly If you're stuck with keys that don't turn on or work correctly It can be frustrating. There are simple steps you can take to resolve the issue. The first step is to remove the metal emergency key from the key fob. Then you can use the flat end of the key made of metal to press and open the cover. Keyless Entry System The keyless entry system is a huge benefit for any car owner. They let you unlock your car before you even touch a lever or walk out of the doorway for the passenger. program lexus key turn on lights when you approach or open the trunk if it's filled with groceries, or turn on 10 other electronic gadgets dependent on your proximity. The key fob transmits a radio frequency signal the car's receiver, which in turn sends an answer code back to the vehicle. The signal only works when the keyfob is within a specific distance, which is typically 50 feet or less. Some of these systems are one-way. This means that the key fob can lock or unlock the vehicle, but it can't start the engine. It is recommended to have your keyless entry system installed by a professional, regardless of the type. A professional locksmith in the automotive industry will make sure that the connection is complete and secure, even if that requires stripping a small part of each wire. The manual for the instructions will outline the exact wires to use, and it is important that you only use ones that are required. A remote with a keyless entry feature can also lock the doors when you walk away. This is a great feature if are not organized or have a tendency to leave your car unlocked for too long. Transponder Keys Transponder keys or transponder chips are a standard feature in modern automobiles. These chips are integrated into the head of a key or fob and have a unique code that is linked to your vehicle's immobilizer system. When the key is put into the ignition lock cylinder and then turned to ON, a signal is sent from the antenna ring on the top of your car's ignition to your transponder chip. The chip sends an appropriate code-matching response to the antenna ring. The use of a transponder chip discourages theft because the key must be inserted correctly and contain the correct code to allow your car to turn on. It's also more difficult to duplicate the keys, which makes it less likely that someone can take your vehicle. A reputable locksmith can make transponder keys that are programmed to match your vehicle at less than the price that you would spend at a car dealer. They can also assist you to understand what type of key you own and how to program it for your car. They may even be able to give you an alternative for your lost or stolen transponder key. They may even be able to help you reprogramme your chip if it's not working. Duplicate keys Most people have lost keys at one point or another in their lives regardless of whether it was their car keys or their home keys. It's frustrating to be locked out of your car or home. It's essential to have duplicate keys in order to avoid this situation. These duplicates can help you open your lock should you ever need to get stuck. Most duplicate keys are engraved or stamped with the “do not duplicate” message. This is a way of letting the public that it is not legal to duplicate the key unless you're the owner of it. These keys are utilized for padlocks and deadbolts as in other door locks. They are also a great way to keep track of which keys belong to which customer. Many people believe that the “do not duplicate” message on a key makes it more secure. This is not the case. The engraved message is merely a warning and does not carry any legal weight. However, it could hinder some people from attempting to duplicate their keys. A majority of chain hardware stores do not cut keys. However locksmiths are able to duplicate the keys. In fact, they can be cut using a replica blank to ensure that the duplicate is exact. Battery Replacement If your Lexus key fob has stopped functioning, it's likely to need to be reprogrammed in order to work with the vehicle's immobilizer system. It is necessary to contact a locksmith or your dealer to program the ECU. In general, locksmiths will charge more than a dealership, however they'll also spare you the burden of having to tow your car there. Aside from the ECU the battery could require replacement too. You'll be required to replace the previous battery with one that matches the specifications of your vehicle. This includes the physical dimensions, terminal configuration and cold cranking amps (or amp-hour rating). If you install the wrong battery, it could cause serious damage to your engine as well as other components. Check the warranty before you purchase a new battery, to determine if the price is covered. It is also advisable to think about whether you'll require a warranty if the battery fails during the warranty period. In addition, you should be aware that auto locksmiths often don't carry the necessary tools to program keys, which is why you'll need to get a dealer or online key programmer come and program the key for you. It's also important to inform them know what kind of key you want (chip intelligent, chip, or remote “push-to-start”), the year of your car and the VIN in the event that you can.