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Key Fob Replacement for the Seat Ibiza The fifth-generation Ibiza that has been revamped and is a contender in the supermini segment. It is competing 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 open the battery compartment cover of the key fob (B). Replace the CR2025 coin battery, making sure it is fitted in the correct direction and polarity. Dead Coin Battery The most common reason for a key fob to not allow you to lock or unlock your car is a dead battery. Before it dies you'll see a decrease in range or no power. It is easy to replace it with a new one (CR2025) from a local supermarket. seat key is important to be aware that using the wrong or incompatible batteries could damage your key fob. Make sure the battery you replace has the same size and voltage and has the same specifications. If your fob was exposed to clean water such as rain or soapy tap water, it is likely that the chip inside has been damaged due to corrosion. You could try cleaning the chip using isopropyl alcohol or an electronic cleaner to test if it helps, but it is most likely that the chip has fried. A new key fob is the easiest solution. Most major car dealers sell key fobs and they can be installed by an experienced mechanic. They can also be purchased on the internet through sites like ebay. It is best to work on a work surface that has good lighting. It makes it easier to work with small pieces. It also allows you to avoid placing things in the wrong spot. Always keep the key fob in a secured and safe space. Water Damage You may think your key fob is lost if you drop it into the pool or accidentally wash it. There's a chance. When the circuit board in the fob is exposed to water, it transforms into a conductor which shorts the components. It also accelerates the process of corrosion and rust. Fortunately, this is easy to fix. Simply locate something absorbent and put it inside the fob. Paper towl or tissue works well. Then you can use a cotton swab that has been soaked in isopropyl ethanol to wipe down the circuit board and other components to clean out any residue of battery acid and contamination. Let the fob air dry in a warm, dry environment for a few weeks. Once the fob is been drained then replace the battery with a new one of the same size and the same polarity ('+' that is pointing upwards). The fob can be difficult opening to access the battery, however If you have a flat-head screwdriver at hand it will be simple to insert. Once the fob has been rebuilt, it should operate just as normal. If it doesn't work, you'll require reprogramming it or replace the receiver module. Radio Interference If a key-fob is functioning properly, it emits the radio frequency signal which is interpreted by the receiver module inside your car. However, if the signal is distorted in any way your key fob will not function as expected. This can be caused by objects such as weather conditions, objects, or other transmitters that operate at the same frequency close to your vehicle. In this instance it is best to replace the battery on your key fob. In this case it's best to replace the battery in your key fob. Some LED lighting from the aftermarket that uses the same frequency as the remote key fob may interfere with the signal and block it from reaching the receiver modules. The LED's lighting needs to be turned off or switched to a different frequency in order to keep out interference. If the issue is still present after installing a new battery, the antenna on the key fob might be damaged or is malfunctioning. This is since the antenna is responsible for sending a signal from the key fob to the receiver module. The OBDII scanner is able to assist in diagnosing the problem by revealing what's wrong with the system. The scanner will request details about the vehicle you own like the make and model along with the 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. If this module fails that causes it to fail, the entire onboard electronics will cease to function. If this happens Reprogramming using an OBDII scanner or replacing the key fob itself may aid. This issue can be caused by a dead coin-cell or water damage, or signal interference. It is possible to reset the on-board computer by disconnecting the 12 volt batteries for 15 minutes. This will remove any remaining electricity that could be causing issues. Start by removing the cable from the negative terminal of the battery first, followed by the positive terminal. After 15 minutes, connect your battery in reverse order. First positive, then negative the next. The internal chip of the key fob can be damaged by dirt or water. If your key quit working after getting wet, wipe the electronic component with isopropyl ethanol or an electronic cleaner prior to installing the battery. If it stopped working after exposure to soapy or salty water, the chip is probably damaged and should be replaced. Another possibility is an inoperable antenna module fuse that transmits the lock and unlock signal to the vehicle. The fuse may be located in several places, depending on the model. For instance it could be under the rear seat, or in the trunk, or the side of the dashboard.