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How to Replace a Jaguar XF Replacement Key Fob Modern keyfobs that are high-tech aren't easily replaced. In contrast to older keys made of metal which can be purchased at any hardware store for less than $5, the modern key fobs cannot be easily replaced. The battery needs to be replaced when the range of the key fob decreases and the Jaguar vehicle's message center displays the message “SMART KEY” BATTERY LOW. Keyless Entry Keyless entry systems are becoming more popular with car owners because of their convenience and security features. Some models lock or unlock the door when you make contact with it, which is a lot easier than trying to find keys in your pocket. In addition, these systems tend to be more secure than standard car locks due to the fact that they use rolling codes that change every time you use the key fob. This makes it harder for thieves to hijack or alter the signal. Key fobs emit radio frequency that carry a unique digital identification code that can only be recognized by the vehicle. When you hit one of the buttons on a Jaguar key fob, it transmits the code to the car's computer, which in turn responds by opening the doors and starting the engine. The key fob may also send a signal through the trunk receiver that can be used to open the tailgate, without having to touch it. Unfortunately, thieves are finding ways around these systems. They've been able to use software that can decode the signals sent by key fobs, or even remotely reprograms a new key to the car's security code. Many experts suggest adding a shielded case to your keyfob. These cases limit the distance that the frequencies emitted from the fob can be transmitted. They are available at many auto parts stores and cost less than $10. Remote Start Your Jaguar XE keyfob can be used to remotely lock, unlock and start your vehicle. Press and hold the lock button while keeping the key fob within reach of your vehicle. After the door handles have been locked, press the start button to begin your engine. If the key fob is not able to be found, the car will display the message “SMART Key Battery Low”. Most new Jaguar models offer remote-start capability. With g28carkeys.co.uk , you are able to start your vehicle's engine through the convenience of your smartphone. This feature is especially helpful when you're returning home after a long trip or when it's too cold turn on the heater. You can save money on fuel and reduce pollution, as well as protect the environment while driving. The new smart keys come with built-in security chips, unlike the old metal keys that you can purchase at hardware stores. This feature protects your vehicle from being taken by someone else who finds and tries to use the. This technology also makes it difficult for locksmiths to duplicate these keys, so you'll have to go to your dealer for replacement Jaguar XF keys. The days of purchasing replacement car keys at the local hardware store are slowly disappearing into the past as modern automobile owners choose to use more sophisticated key fobs that allow you to control your vehicle using an app. The latest technologies make the cars of today more convenient, safe, and reliable than ever. However, this extra functionality comes at a cost: the latest key fobs are required to be purchased from the dealer and programmed with your vehicle. Anti-Theft System The anti theft system was designed to deter criminals from stealing your Jaguar. It utilizes a technology known as Ultra Wideband to detect and verify the signal from the key fob. This prevents relay attacks, that could intercept the signal for unlocking or starting the car even if the key isn't inserted in the ignition. The system also features Guardian Mode, which reports that the vehicle has been locked or started unexpectedly. Jaguar recommends activating this feature during the handover procedure. In addition the Jaguar XF features an immobilizer that ensures that the key fob is being used to turn on the engine. If the key isn't being used the immobilizer will disable the fuel pump, ignition coil and injectors, stopping the vehicle from beginning. Modern Jaguars, unlike older vehicles have advanced security systems which require specialized equipment and tools to service. This includes diagnostic tools like a scanner that can detect the anti-theft control module's diagnostic trouble codes and also check real-time and freeze frame information. The technician also needs to physically test the voltages of analog throughout the system. You can do this by connecting a multimeter with the anti-theft control module, or by using factory software. This is the most popular method of diagnosing an anti-theft system. If the technician detects problems, they may need to replace the module. Bluetooth Bluetooth has been around for more than 20 years ago and has revolutionized wireless communication. Bluetooth technology is everywhere from lights to cars and even smartphones. To set up a Bluetooth connection between two devices, both of them need to have it turned on and close enough for the connection to occur. You may have to access your device's settings depending on the model. A iOS or Android phone has an Bluetooth menu, whereas desktop computers usually have one in the Control Panel. The initial Bluetooth connection must be paired, with the two devices exchanging unique addresses which are represented as Hexadecimal numbers. Contrary to other RF technologies, Bluetooth is secure, with encryption and authentication to protect data transmissions. Bluetooth operates on the unlicensed ISM band and has a set of standard guidelines and specifications that differentiate it from other protocols such as ZigBee or WiFi. The majority of Jaguar XF models offer Bluetooth connectivity by default, and you can pair an compatible smartphone to the car using InControl. This is done through the smartphone's Bluetooth menu; the steps differ from one manufacturer to the next and so you must refer to the InControl manual to see exactly how to do it. You may also need enter a passcode to complete the connection which will be displayed on your vehicle's touchscreen.