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Key Fob Replacement for the Seat Ibiza The fifth-generation Ibiza that has been redesigned and is a contender in the supermini segment. It competes with the Renault Clio, Peugeot 208 and Ford Fiesta. With a thumb nail, or a small screwdriver with a flat head (A), prise upwards the key fob compartment cover (B). Replace the CR2025 battery and ensure that it is placed in the proper direction. Dead Coin Battery A dead battery for a coin is the most frequent cause of a key fob not locking or unlocking your vehicle. It will usually show warning signs prior to dying such as a decreasing range or no power at any time. It is simple to replace with a new one (CR2025) from an area supermarket. Be aware that using the wrong or unsuitable batteries can cause damage to your key fob. Make sure the battery you choose to replace is the same size and voltage and that it is the same specification. If your device has been exposed to clean water, such as rainwater or soapy tap water It is likely that corrosion has caused damage to the electronic chip. You can clean the chip using isopropyl or electronic cleaners to see if this helps, but that the chip is fried. The most straightforward option is to buy a new key fob. Major car dealers sell them and they can be installed by a skilled mechanic. They can also be purchased on the internet through sites like ebay. The best way to work is to work on a flat surface that has adequate lighting. It is much easier to work on the small parts. This also helps you to avoid putting something back in the wrong spot. Always keep your key fob in an area that is safe and secure. Water Damage You may think that your key fob is lost if you drop it into an unintentional pool or accidentally wash it. But there's a way to salvage it. The problem is when the circuit board in the fob is in contact with water. It creates a fantastic conductor and shorts components. It also speeds up the process of rust and corrosion. Luckily, this is simple to fix. Find something absorbent to place inside the fob. A tissue or a paper towel will work. Then you can use an alcohol-soaked cotton swab and a cotton swab isopropyl alcohol and wipe down the circuit board as well as other components to eliminate any battery acid residue and contamination. Let the fob dry out for some time in a dry and warm environment. Replace the battery once the fob has dried out by replacing it with a new one that has the same dimensions and the same polarity ('+' (pointing upwards). It can be tricky to open the fob to access the battery, however if you have a small screwdriver that is flat available, it should be able to slide into easily. Once the fob has been repaired, it should function in a normal manner. If it doesn't, then you'll have to reprogramme it or replace the receiver module. Radio Interference If a key fob is functioning properly, it sends an audio frequency signal that is received by the receiver module in your car. If the signal is disrupted the key fob won't function. This could be caused by objects, weather conditions or other transmitters operating on the same frequency close to your car. In this case it is recommended to replace the battery in your key fob. In this case it is best to replace the battery in your key fob. Some LED lighting from the aftermarket that utilizes the same frequency as a remote key fob might interfere with the signal and prevent it from reaching the receiver modules. The LED lighting must be switched off or changed to a different frequency to prevent interference. If G28 got a new battery in your key fob and the issue persists, it is likely that the antenna on the key fob is damaged or has stopped working. This is significant since the antenna is responsible for transmitting a signal from the key fob to the receiver module. An OBDII scanner can help diagnose this issue by revealing what's wrong with the system. The scanner will ask for details about the vehicle you own including the model and make of the vehicle, the type of engine, and VIN number. Faulty Receiver Module The key fob comes with a receiver module which transmits signals to lock and unlock the key fob. If the receiver module is damaged and the on-board electronics will stop working. Reprogramming the key fob by an OBDII scan or replacing it could help. This issue can be caused by a dead coin cell battery, water damage or signal interference. You can reset your on-board computer by disconnecting the 12 volt batteries for about 15 minutes. This will eliminate any remaining electrical energy that could be causing problems. Take the cable off first of the negative terminal, then from the positive terminal. After 15 minutes, you can reconnect your battery in reverse order. Positive first, then negative second. The internal chip in the key fob could be damaged by dirt or water. If your key has stopped working after being wet, you need to clean the electronic component using isopropyl alcohol or an electronics cleaner before reinstalling the battery. If it has stopped working after exposure to soapy or salty water the chip is likely damaged and should be replaced. A damaged antenna module fuse may also be the cause. It's the fuse that sends an electronic signal to the vehicle to lock or unlock. The fuse can be located in a variety of places, based on the model. For example it could be under the rear seat or trunk, or the side of the dashboard.