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How to Replace a Lexus Key Fob That Won't Turn On Or Work Correctly If you have keys that don't function or turn on It can be frustrating. Luckily, there are easy steps you can take to fix the problem. First, remove the metal emergency keys from the key fob. Make use of 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 can be a great benefit for any car owner. They let you unlock your car before you even touch the handle or step out of the passenger door. Some even turn on the lights as you approach or open the trunk when you've loaded it with groceries, or turn on 10 other electronic gadgets in response to your proximity. The key fob sends an radio-frequency signal to a receiver in the car. lexus replacement key thekeylab.co.uk sends back a response code back to the vehicle. The signal is valid only when the key fob is within a specified range, usually about 50 feet or less. Some of these systems are single-way, meaning the key fob can be used to lock or unlock the vehicle, but can't start the engine. It is recommended to have your keyless entry system installed by a professional, regardless of the type. A good automotive locksmith will ensure that the connection is safe and complete, incorporating stripping a small portion of each wire before connecting it. The manual will explain which wires to use. Another perk of keyless remote access is that it could also lock your doors automatically when you step away from your vehicle. This is useful for those who forget and tend to leave their vehicle unlocked for long enough. Transponder Keys Transponder keys (or transponder chips) are a key feature in most modern cars. These chips are integrated into the head of a fob or key and contain a unique number that is connected to your vehicle's immobilizer system. The antenna ring at the top of the ignition sends signals to the transponder chip once the key is inserted, and then turned on. The chip transmits a response back to the antenna ring that matches the car's code. The use of a transponder chip can deter theft because the keys must be put in correctly and have the right code for your car to turn on. It's also much more difficult to make a duplicate of the keys, which makes it less likely that someone will be able to take your vehicle. A reputable locksmith can create transponder keys that are programmed for your car at a fraction of what you would pay at a car dealership. They can also tell you the type of key in your possession and how to program it. They might even be able to give you a new key for your lost or theft transponder. They can also help reset the chip if it is not functioning. Duplicate keys It doesn't matter if it's your car keys or your house key, a majority of people have lost their keys at some time in their lives. It can be a hassle to be locked out of your car or home. It's essential to have duplicate keys in order to avoid this problem. These duplicates will help you unlock your lock if you ever become stuck. Most duplicate keys feature the “do duplicate” message stamped or engraved on them. This is a way of letting people that it's not legal to copy the key unless you're the owner of the key. Keys are used to open deadbolts and padlocks as well for other door locks. These keys are also great for keeping an eye on which key of the customer is which. Many people believe that the “do duplicate” message on the keyboard makes it more secure. But, this isn't true. The message on these keys is simply a warning and does not have any legal significance. However, it might hinder some people from attempting to have their key duplicated. Some chain hardware stores refuse to cut the keys, but locksmiths are able to duplicate the keys. In fact, they can even be cut using a replica blank to ensure that the duplicate is exact. Battery Replacement If your Lexus key fob has stopped working, it will probably require reprogramming to work with the immobilizer system of your vehicle. You'll have to visit the dealer, or a locksmith who's qualified to reprogram the ECU. Locksmiths typically cost more than the dealership, however you'll save yourself the hassle of towing your car. In addition to the ECU there is a chance that your battery will need to be changed. It is necessary to replace your old battery with one that matches the specifications of your car. This includes the physical dimensions, terminal configuration, as well as cold cranking amps (or amp-hour rating). If you install a defective battery it could cause serious damage to the engine as well as other components. If you are considering purchasing a replacement battery, verify the warranty to determine if it covers the cost. You might also want to consider whether you'll require an assurance in the event that the battery fails within the warranty period. Keep in mind that most automotive locksmiths do not have tools needed to code keys. So, you'll have to find a dealer to program your key or utilize an online key programmer. It's also important to inform them know what kind of key you want (chip, intelligent, or remote “push-to-start”) and the year that your car was and the VIN should you be able to.