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Key Fob Replacement for the Seat Ibiza This fifth-generation Ibiza that has been updated, is a contender for the supermini segment. It competes with Renault Clio and Peugeot 208 as well as the Ford Fiesta. With a thumb nail or small screwdriver with a flat head (A), prise upwards the key fob compartment cover (B). Replace the CR2025 batteries, making sure it is placed in the correct direction. Dead Coin Battery The most common reason for a key fob that does not be able to lock or unlock your car is a dead battery. It is likely to show warning signs prior to dying such as a decreased range or no power at any time. It is simple to replace it with a new (CR2025) one at your local grocery store. Be aware that faulty or unsuitable batteries may damage the key fob. Be sure that the battery you replace is the same size and voltage, as well as the same specification. If your fob was exposed to clean water, like rain or soapy tap water it is possible that the chip inside has been damaged by corrosion. The Keylab can clean the chip using isopropyl or electronic cleaners to see if this helps, but that the chip has been damaged. A new key fob is a simple solution. They can be purchased from a variety of major dealerships and can be fitted by an experienced mechanic. You can also buy them online, like on eBay. It is best to work on a surface with good lighting. It makes it easier to work with the small parts. You will also be able to avoid putting something in the wrong location. Always keep the key fob in a secure and safe place. Water Damage You might think that your key fob is lost if you drop it into the water or accidentally wash it. However, there's still a chance. When the circuit board inside the fob is exposed to water, it transforms into an electrical conductor, which shorts the components. It also speeds up the process of rust and corrosion. This is a simple solution. Find something absorbent, and put it inside the fob – a paper towl or tissue is ideal. Then, use a cotton swab dipped in isopropyl ethanol to wipe down the circuit board and other components to remove any battery acid residue and contamination. Let the fob air dry in a warm, dry environment for several weeks. Replace the battery when the fob is dried out with a new one that has the same dimensions and polarity ('+' (pointing upwards). It can be tricky to open up the fob to access the battery but if you have a small screwdriver that is flat at hand, it will slide in easily. After the fob is reassembled and working, it should operate just as normal. If it doesn't work, you may have to program it again or replace the module. Radio Interference If a keyfob works properly, it sends out a radio frequency that is picked up by a receiver module inside your car. If the signal is distorted in any way, your key fob won't function as expected. This could be due to objects, weather conditions, or other transmitters operating at the same frequency as your car. This could cause your key fob's button to not work the vehicle's systems, such as the ignition switch or the security system. It is best to replace your key fob's battery. A few aftermarket LED lighting fixtures that utilizes the same frequency as a remote key fob can interfere with the signal and stop it from reaching the receiver modules. To avoid interference, the LED light must be turned off, or switched to another frequency. If you have a brand new battery in your key fob and the problem persists, it is possible that the antenna on your key fob is damaged or has stopped working. This is crucial because the antenna is responsible for transmitting an indication from the key fob to the receiver module. A scan of the OBDII can help diagnose the problem by telling you exactly what's wrong with your system. The scanner will ask for details about your vehicle including the model, make, engine type and VIN number. Faulty Receiver Module The key fob comes with a receiver module that sends signals to lock and unlock the key fob. All electronic components that are on-board will stop working if the receiver module has a problem. If this is the case, reprogramming with an OBDII scanner or replacing the key fob may help. There are a variety of possibilities for the cause of this problem which could be due to an empty coin battery, water damage, or signal interference. You can reset the on-board computer if you disconnect the 12 Volt batteries for 15 minutes. This will drain any residual electric current that could cause problems. Take the cable off first of the negative terminal, then from the positive terminal. After 15 minutes, reconnect your battery in reverse order. First, positive, then negative, and finally negative. Water or dirt can also cause damage to the internal chip of the key fob. If your key fob stopped working after getting wet, wipe it with isopropyl, or an electronics cleaner. After that, replace the battery. If it has stopped working after exposure to soapy or salty water the chip may be fried and will need to be replaced. A damaged antenna module fuse may also be the cause. 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 located in a variety of places like the engine bay, the side of the dashboard, beneath the rear seat, or in the trunk.