Key Fob Replacement for the Seat Ibiza This fifth-generation Ibiza that has been redesignated 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-headed head A and pull upwards the key fob battery compartment cover B Replace the CR2025 batteries, making sure it is placed in the correct direction Dead Coin Battery A dead battery for a coin is the most typical cause of a key fob not locking or unlocking your car When it is dead, you will notice the decrease in range or no power It is easy to replace it with a brand new CR2025 one from your local supermarket Be aware that faulty or defective batteries could damage the key fob Make sure that the replacement battery is the same size and voltage, and that it is the same specification If your fob was exposed to clean water like rain or soapy tap water, it is possible that the electronic chip inside has been damaged by corrosion You can try cleaning the chip with isopropyl Alcohol or an electronic cleaner to check if it works but it is more likely that the chip has fried A new key fob is the most straightforward solution They are available from most major dealerships and can be installed by a qualified mechanic You can also purchase them online, for example on eBay The best thing to do is to work on a flat surface with adequate lighting This will make it easier to work on small parts inside This can also help to avoid putting anything back in the wrong spot Always work on your key fob in a place that is safe and secure Water Damage If your key fob is wet from dropping it into the pool or throwing it in the wash you might think it's a goner but there's still hope When the circuit board on the fob is exposed to water, it transforms into a conductor which shorts the components It also increases corrosion and rust Luckily, this is a simple issue to fix Find something absorbent and place it inside the fob - paper towl or tissue work well Use https//wwwthekeylabcouk/seat-car-keys/ swab with isopropyl to clean the circuit board, as well as any other components Let the circuit board dry for a few days in a dry and warm environment After the fob has been drained and the battery is replaced with a new one of the same size and polarity '+' pointing upwards The fob can be difficult opening to access the battery, but if you keep a flat-head screwdriver on hand it will be a breeze to slide in Once the fob is reassembled and working, it should operate as normal If it isn't working you may need to program it again or replace the module Radio Interference When a key fob functioning properly, it sends the radio frequency signal which is received by the receiver module in your car If the signal is disrupted the key fob will not function This could be due objects, weather conditions or other transmitters operating on the same frequency near your car This could cause your key fob not to be able to trigger the vehicle's features such as the ignition switch, or the security system In this scenario it's best to replace the battery in your key fob A few aftermarket LED lighting fixtures that utilizes the same frequency as a remote key fob might interfere with the signal, preventing it from reaching the receiver modules To avoid interference, the lighting must be switched off or switched to another frequency If the issue is still present after replacing the battery, the antenna on your key fob may be damaged or malfunctioning This is significant since the antenna is responsible for sending an indication from the key fob to the receiver module An OBDII scanner can aid in diagnosing the issue by revealing what's wrong with the system The scanner will ask you for details about your vehicle, such as the make and model along with the engine type and VIN number Faulty Receiver Module The key fob is equipped with an electronic receiver that transmits signals to lock and unlock the key fob If this module fails then all the on-board electronics will stop working Reprogramming the key fob using an OBDII scan or replacing it can help This issue can be caused by a dead coin-cell or a water damage or signal interference It is possible to reset the on-board computer if you disconnect the 12 volt batteries for 15 minutes This will eliminate any remaining electrical energy that could be causing problems The cable should be removed first from the negative terminal, then from the positive terminal After 15 minutes, reconnect the battery in reverse order beginning with positive first, and negative second The internal chip in the key fob can also be damaged by water or dirt If the key fob you purchased stopped working after getting wet, clean it using isopropyl or an electronic cleaner Then, you can reinstall the battery If the key stopped working after being exposed to soapy or salted water, it's likely that the chip has been damaged and needs to be replaced Another possibility is a damaged antenna module fuse that sends the signal to lock or unlock to the vehicle The fuse could be found in various places, based on the model For example, it could be under the rear seat, or in the trunk, or the side of the dashboard