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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 competes against the Renault Clio, Peugeot 208 and Ford Fiesta. Make use of a small screwdriver with a flat head or a thumbnail (A) to remove the battery compartment cover of the key fob (B). Replace the CR2025 battery, making sure it is placed in the correct direction. Dead Coin Battery A dead battery on a coin is the most common reason of a key fob that isn't locking or unlocking your car. It is likely to show symptoms before it dies such as a decreased range or no power at any time. It is easy to replace it with a fresh one (CR2025) from an area supermarket. Be aware that defective or defective batteries could cause damage to the key fob. Make sure that the new battery is identical in size, specifications and voltage as the old one. If your device has been exposed to clean water, for example rainwater or soapy tap water it is possible that corrosion has caused damage to the electronic chip. You could clean the chip with isopropyl or electronic cleaners to see if it can help, but the chip is fried. The simplest solution is to purchase an entirely new key fob. The majority of major car dealers sell key fobs and they can be installed by an experienced mechanic. They can also be purchased on ebay. The best thing to do is to work on a level surface with good lighting. It makes it easier to work with small parts. You'll also be able to avoid placing something in the wrong location. Always keep your key fob in a place that is secure and safe. Water Damage If your fob's key gets submerged after dropping it into the pool or throwing it in the washing machine, you may think it's over, but there's still hope. When the circuit board in the fob is exposed to water, it transforms into a conductor that shorts out the components. It also speeds up corrosion and rust. This is an easy solution. Find something absorbent and place it inside the fob. A paper towl or tissue can be used. Make use of a cotton swab and isopropyl to clean the circuit board and any other components. Let the fob air dry in a dry, warm environment for several weeks. Replace the battery once the fob has dried with a fresh one that has the same size and the same polarity ('+' (pointing upwards). The fob might be difficult to open to access the battery, however If you have a flat-head screwdriver at hand, it should be easy to insert. Once the fob has been rebuilt, it should operate as normal. If it fails you may need to program it again or replace the module. Radio Interference When a key fob working correctly, it sends an audio frequency signal that is interpreted by the receiver module inside your car. If the signal is disrupted the key fob won't work. This can be caused by objects like weather conditions or other transmitters operating on the same frequency in close proximity to your car. In this scenario it is best to replace the battery on your key fob. In this scenario it is recommended to replace the battery in your key fob. A few LED lights that are aftermarket and uses the same frequency as a remote key fob might interfere with the signal and block it from reaching the receiver modules. To avoid interference, the LED light must be turned off or to a different frequency. If the issue continues to persist after replacing the battery, the antenna on your key fob may be damaged or not functioning properly. The antenna is responsible for transmitting signals between the key fob and the receiver module. Utilizing an OBDII scanner will assist in diagnosing the problem by telling you what is wrong with the system. The scanner will ask you for details about the vehicle you own, such as the make and model along with the engine type and VIN number. Faulty Receiver Module The key fob features a receiver module that sends signals for locking and unlocking. If seat key replacement is damaged then all the on-board electronics will stop working. Reprogramming the key fob with an OBDII scan, or replacing it might help. This problem can be caused by a dead coin cell battery or a water damage or signal interference. You can try resetting the on-board computer by disconnecting the battery 12 volts for 15 minutes. This will flush out any residual electric current that could cause problems. Take the cable off first of the negative terminal, then the positive terminal. After 15 minutes, connect your battery in reverse order. First positive, then negative, and finally negative. Dirt and water can harm the internal chip of the key fob. If your key fob stops working after being soaked, clean it with isopropyl or electronics cleaner. Then, reinstall the battery. If it stopped working after exposure to salty or soapy water, the chip is probably damaged and needs to be replaced. Another possibility is a damaged antenna module fuse that is sending the lock or unlock signal to the vehicle. The fuse can be located in a variety of places, based on the model. For example it could be beneath the rear seat, or in the trunk, or on the side of the dashboard.