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How to Replace a Jaguar XF Replacement Key Fob Unlike older metal keys that can be copied for less than $5 at any hardware store, today's high-tech key fobs cannot be replaced easily. The battery needs to be replaced if the key fob’s range decreases and the Jaguar vehicle's message center shows the message “SMART KEY” The battery is low. Keyless Entry The convenience and security of keyless entry systems are growing in popularity with car owners. Certain models lock or unlock the door when you touch it, which is a lot easier than trying to find keys in your pockets. These systems are more secure than standard locks as they use rolling codes that change every time you use your key fob. This makes it difficult for thieves to hijack the signal or spoof it. Key fobs emit a radio signal with a unique digital identity code that only the vehicle is able to recognize. When G28CarKeys press a button on a Jaguar's key fob the computer inside the car is notified of the code and responds by opening doors and starting the motor. The key fob can send a signal to the trunk receiver, which can be used to open the tailgate, without having to touch it. However, criminals have discovered ways to circumvent these systems. They've managed to use software that decodes signals transmitted by key fobs and even remotely reprograms a new key to the car's number. Many experts suggest installing a shielded case on your key fob. These cases limit the distance frequencies emitted by the fob can travel. They are available at most auto parts stores for under $10. Remote Start You can make use of your Jaguar XE key fob to lock, unlock, and start your car remotely. Press and hold the lock button, while holding the key fob within reach of your car. Push the start button once the door handles are locked. If the key fob can't be found, the car will display the message “SMART Key Battery Low”. Most recent Jaguar models offer remote-start capability. With this feature, you are able to start your vehicle's engine through the convenience of your phone. This feature is especially helpful when you're returning home from a long drive or it's too cold to turn on the heater. You can reduce fuel consumption while reducing pollution and protecting the environment while driving. The new smart keys come with built-in security chips in contrast to the traditional metal keys that you can purchase at hardware stores. This security feature helps protect your vehicle from being taken by someone else who discovers and tries to use it. This technology makes it difficult for car thieves and locksmiths to duplicate keys. You'll need to go to your dealer to obtain a the replacement Jaguar XF key. The days of buying replacement car keys at your local hardware store are disappearing into the past as contemporary automobile owners are opting for more advanced key fobs that let you control your vehicle from an app. These new technologies make vehicles safer, more convenient, and capable than ever. However, this extra functionality comes at a cost that is why the most recent key fobs are required to be purchased from the dealership and then programmed with your vehicle. Anti-Theft System The anti theft system has been designed to stop criminals from theft of your Jaguar. It utilizes a technology known as Ultra Wideband to detect and confirm the signal of the key fob. This blocks relay attacks that can intercept the signal to unlock or start the car even when the key isn't in the ignition. The system comes with a Guardian Mode that reports if the vehicle is locked unexpectedly or started. Jaguar suggests activating this feature during the handover process. The Jaguar XF also features an immobilizer that confirms that the key is being used to start the engine. If the key isn't being used the immobilizer will shut down the ignition coil and injectors, stopping your car from getting started. Unlike older vehicles that were built in the past, modern Jaguars have sophisticated security systems that require special tools and equipment to maintain. Diagnostic tools like scanners can be utilized to read the diagnostic trouble codes of anti-theft control systems and check real-time data and freeze frame. Technicians will need to test analog voltages in the entire system. This can be accomplished by connecting a multimeter to the anti theft control module or using the factory software. This is the simplest way to diagnose an anti-theft system. If the technician discovers any issue, they could need to replace the device. Bluetooth Bluetooth has been around since over 20 years and has revolutionized wireless communication. This technology is widely used and is present everywhere from light bulbs to smartphones, and automobiles. To establish the Bluetooth connection between two devices, both need to have it turned on and be within a reasonable distance for the communication to take place. You may have to access your device's settings based on the type. An iOS or Android phone comes with a Bluetooth menu, whereas desktop computers usually have one in the Control Panel. The initial Bluetooth connection must be paired with the two devices exchanging their unique addresses which are represented as the hexadecimal value. Bluetooth unlike other RF technologies, is secure. It uses encryption and authentication to safeguard data transmissions. It operates in the unlicensed ISM frequency band, and a standard set of guidelines and specifications differentiates it from other protocols like ZigBee and WiFi. The majority of Jaguar XF models offer Bluetooth connectivity by default and it is possible to pair a compatible phone with the car using InControl. This is done via the phone's Bluetooth menu. The steps differ from one manufacturer to the next and therefore, you should consult the InControl manual to see exactly how to accomplish it. You may need to enter a passkey which will be displayed on the touchscreen of your vehicle, to complete the connection.