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Key Fob Replacement for the Seat Ibiza This refreshed fifth-generation Ibiza is an attractive contender in the supermini segment. It competes with the Renault Clio and Peugeot 208 as well as the Ford Fiesta. Make use of a small screwdriver with a flat head or a thumbnail (A) to remove the battery compartment cover on the key fob (B). Replace the coin battery CR2025, making sure it is in the proper direction and polarity. Dead Coin Battery A dead coin battery is the most common cause of a key fob that isn't locking or unlocking your vehicle. After it has died, you will notice an increase in range, or no power. It is simple to replace it with a brand new (CR2025) one from your local supermarket. Be aware that defective or defective batteries could cause damage to the key fob. Make sure that the new battery has identical in size, specifications and voltage as the previous one. If your fob was exposed to clean water, such as rainwater or soapy tap water It is likely that corrosion has damaged the chip's electronic components. You can try cleaning the chip with isopropyl Alcohol or an electronic cleaner to try to see if this helps but it is likely the chip has been fried. The most efficient option is to buy an entirely new key fob. They are available at most major dealerships and can be installed by a qualified mechanic. They can also be bought on ebay. It is best to work on a surface that is equipped with good lighting. This makes it easier to work on small parts inside. This will also help you to avoid putting anything back in the wrong place. Always work on the key fob in a secured and safe place. Water Damage It's possible to think that your fob is ruined if you drop it into the pool or accidentally wash it. But there's still hope. When seat car key replacement inside the fob is exposed to water, it develops a conductor that shorts out the components. It also speeds up the process of corrosion and rust. This is an easy solution. Find something absorbent to put inside the fob. A tissue or paper towel would be ideal. Then make use of a cotton swab that has been soaked in isopropyl alcohol and wipe down the circuit board and other components to remove any residues of acid from batteries and contamination. Let the circuit board dry for a few days in a dry and warm environment. Replace the battery when the fob has dried with a fresh one that is the same dimensions and polarity ('+' (pointing upwards). It isn't easy to open up the fob to get access to the battery, but if have a small screwdriver with a flat head handy it should slide in easily. After the fob is reassembled and working, it should operate just as normal. If it doesn't, you might need to reprogramme it or replace the receiver module. Radio Interference If a key-fob is functioning correctly, it transmits the radio frequency signal which is received by the receiver module in your car. If the signal is damaged in some way the key fob won't work properly. This could be caused by objects, weather conditions or other transmitters operating in the same frequency range near your vehicle. In this case, it is best to replace the battery on your key fob. In this situation, it would be best to replace the battery in your key fob. A few LED lighting aftermarkets that utilizes the same frequencies as the remote control key fob can interfere with the signal, stopping it from reaching receiver modules. The LED's light source must be switched off or changed to a different frequency in order to keep out interference. If you have a brand new battery in your key fob, and the issue persists, it's likely that the key fob's antenna is damaged or not functioning properly. The antenna is responsible for transmitting a signal between the key fob and the receiver module. An OBDII scan can help you identify the issue by revealing exactly what's wrong with your system. The scanner will ask for information about your specific vehicle, such as the make and model, engine type, and VIN number. Faulty Receiver Module The key fob comes with a receiver module which transmits signals to lock and unlock the key fob. All on-board electronic components will cease to function if this module has a problem. Reprogramming the keyfob using an OBDII scan, or replacing it can help. This problem could be caused by a dead coin cell battery or a 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 power that may be causing problems. Take the cable off first of the negative terminal, then the positive terminal. After 15 minutes, connect the battery in reverse order: positive first, negative second. Water or dirt can also harm the internal chip of the key fob. If your key quit working after it got wet, wash the electronic component with isopropyl Alcohol or an electronic cleaner prior to reinstalling the battery. If it has stopped working after exposure to soapy or salty water the chip is likely fried and will need to be replaced. A faulty antenna module fuse may also be the cause. This is the fuse that sends an indication to the vehicle to lock or unlock. Based on the model you have, the fuse is located in one of the many locations like the engine bay, side of the dashboard, beneath the rear seat, or in the trunk.