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Key Fob Replacement for the Seat Ibiza The refreshed fifth-generation Ibiza is a contender in the crowded supermini segment. It is up against the Renault Clio, Peugeot 208 and Ford Fiesta. With a thumb nail or small flat head screwdriver (A) lift upwards the key fob compartment cover (B). Replace the CR2025 coin battery, making sure it's in the proper direction and polarity. Dead Coin Battery The most common reason for a key fob to not be able to lock or unlock your car is a dead coin battery. Before it dies, you will see the decrease in range or no power. It is easy to replace it with a new (CR2025) one from your local supermarket. Be aware that defective or unsuitable batteries may damage the key fob. Make sure that the battery you replace has the same size and voltage and that it is the same specification. If your device was exposed to clean water such as rain or soapy tap water, it is possible that the electronic chip inside has been damaged by corrosion. You can clean the chip with isopropyl or electronic cleaners to determine if that helps, but the chip is damaged. A new key fob is the easiest solution. They are readily available from major dealerships and can be fitted by a skilled mechanic. They can also be bought online from places like ebay. It is best to work on a surface with adequate lighting. It makes it easier to work with the smaller parts. This also helps you to avoid putting something back in the wrong place. Always keep the key fob in a secure and safe place. Water Damage You may think your key fob is destroyed if drop it into an unintentional pool or accidentally wash it. But there's still hope. The problem begins when the circuit board inside the fob comes into contact with water. It creates an excellent conductor, and it shorts out the components. It also increases corrosion and rust. Luckily, this is simple to fix. Simply locate something absorbent and place it inside the fob – paper towl or tissue is ideal. Use a cotton swab soaked in isopropyl to clean the circuit board as well as any other components. Let the fob air dry in a dry, warm environment for a few weeks. Replace the battery after the fob is dry with a new one that has the same dimensions and the same polarity ('+' (pointing upwards). The fob might be difficult to open in order to access the battery, but if you keep a flat-head screwdriver in your toolbox it will be a breeze to insert. Once the fob has been rebuilt, it should operate as normal. If it doesn't, you might need to reprogram it or replace the receiver module. Radio Interference If a key fob is working correctly, it sends a radio frequency signal that is picked up by the receiver module in your car. If the signal is disrupted in some way the key fob will not function properly. This could be due to objects like weather conditions or other transmitters that operate at the same frequency as your car. In this situation it is recommended to replace the battery in your key fob. It is recommended to replace your key fob's battery. Some aftermarket LED lighting that uses the same frequency as the remote key fob may interfere with the signal and block it from reaching the receiver modules. To avoid interference, the LED lighting must be turned off or to an alternative frequency. If the issue persists after replacing the battery, the antenna on your key fob may be damaged or inoperable. This is important because the antenna is responsible for sending an indication from the key fob to the receiver module. An OBDII scanner can aid in diagnosing the issue by telling you what is wrong with the system. The scanner will ask for details about your vehicle like the model and make as well as the engine type and VIN number. Faulty Receiver Module The key fob has an electronic receiver that sends the signals needed to lock and unlock. All on-board electronic components will cease functioning if this component becomes inoperable. If this is the case it is possible to reprogramme the module using an OBDII scanner or replacing the key fob itself could aid. This problem could be caused by a dead coin-cell battery either from water damage or signal interference. You can reset your on-board computer if you disconnect the 12 Volt batteries for 15 minutes. This will flush out any residual electricity that could be causing issues. Take the cable off first of the negative terminal, then the positive terminal. After 15 minutes, reconnect the battery in reverse order first: positive, then negative second. Dirt or water can affect the internal chip inside the key fob. If your key fob stops working after getting wet, clean it with isopropyl or electronic cleaner. After that, replace the battery. If seat leon key fob replacement ceases to function after exposure to salted or soapy water, it's likely that the chip is damaged and needs to be replaced. Another possibility is a defective antenna module fuse that sends the lock / unlock signal to the vehicle. Depending on your model the fuse could be located in a variety of places, such as the engine bay, side of the dashboard, beneath the rear seat, or in the trunk.