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Key Fob Replacement for the Seat Ibiza This fifth-generation Ibiza is redesigned is a serious contender for the supermini segment. It goes toe-to-toe with the Renault Clio, Peugeot 208 and Ford Fiesta. With a thumb nail or small screwdriver that has a flat head (A) lift upwards the key fob battery compartment cover (B). Replace the CR2025 battery and ensure that it is placed in the proper direction. Dead Coin Battery A dead battery on a coin is the most common cause of a key fob not locking or unlocking your vehicle. It usually shows signs before it dies such as a decreased range or no power at any time. It is simple to replace it with a new one (CR2025) from a local supermarket. Be aware that faulty or defective batteries could damage the key fob. Make sure that the battery you replace has the same size and voltage as well as the same specifications. 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 due to corrosion. You may try cleaning the chip with isopropyl alcohol or an electronic cleaner to test if it helps, but it is likely the chip is damaged. A new key fob is the most straightforward solution. Most major car dealers offer them and they can be installed by a skilled mechanic. You can also buy them online, for example on eBay. The best way to work is to work on a flat, level surface with adequate lighting. It makes it easier to work with the small parts. You'll also be able to avoid placing something in the wrong location. Always keep the key fob in a secure and safe space. Water Damage You might think that your key fob is damaged if you drop it in the water or accidentally wash it. However, there's still a chance. When the circuit board on the fob is exposed to water, it develops a conductor which shorts the components. It also increases corrosion and rust. Luckily, this is simple to fix. Find something absorbent to place inside the fob. A tissue or paper towel will be ideal. Then you can use an alcohol-soaked cotton swab and a cotton swab isopropyl ethanol to wipe down the circuit board and other components to clean out any residue of battery acid and contamination. The fob should dry for a few days in a dry and warm environment. Replace the battery once the fob is dry with a new one that has the same dimensions and polarity ('+' (pointing upwards). The fob might be difficult to open to get to the battery, but If you have a flat-head screwdriver in your toolbox it will be a breeze to slide in. Once the fob has been repaired, it should function like a normal. If it doesn't work, you may have to program it again or replace the module. Radio Interference When a keyfob operates properly, it transmits an audio frequency that is picked up by a receiver module inside your vehicle. If the signal is damaged in any way your key fob will not work properly. This may be due to factors like weather conditions, objects, or other transmitters operating on the same frequency band close to your car. This can cause your key fob's button to not work the car's systems such as the ignition switch or security system. In this instance it's best to replace the battery in your key fob. A few aftermarket LED lighting fixtures that utilizes the same frequency as a remote key fob might interfere with the signal, preventing it from reaching the receiver modules. The LED lighting must be switched off or changed to a different frequency to keep out interference. If you've got a new battery in your key fob, and the issue persists, it's possible that the antenna on the key fob is damaged or inoperable. This is crucial since the antenna is responsible for sending signals from the key fob to the receiver module. An OBDII scan can help diagnose the problem by revealing exactly what's wrong with the system. The scanner will ask you for information about your specific vehicle including the model and make of the vehicle, the type of engine, and VIN number. Faulty Receiver Module The key fob contains an encoder module that transmits the signals for locking and unlock. All electronic components that are on-board will cease to function if this module has a problem. If this happens it is possible to reprogramme the module using an OBDII scanner or replacing the key fob itself may help. This problem could be caused by a dead coin-cell battery either from water damage or signal interference. You can try resetting the computer on board by disconnecting the battery 12 volts for 15 minutes. This will eliminate any remaining electrical energy 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 second. Dirt or water can cause damage to the internal chip of the key fob. If The KeyLab stopped functioning after getting wet, wipe it with isopropyl or electronic cleaner. Then reinstall the battery. If the key stops working after being exposed to soapy or salted water, it's likely that the chip has become fried and needs to be replaced. A defective antenna module fuse could also be the reason. This is the fuse that sends an alert to the vehicle to lock or unlock. Based on the model you have the fuse can be found in a variety of places such as the engine bay, side of the dashboard, beneath the rear seat, or in the trunk.