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Why a Seat Ibiza Replacement Key Won't Work The Ibiza is now equipped with a new generation of driver assistances. Travel Assist makes sure your vehicle is in sync with traffic flows while Lane Assist takes the worry out of changing lanes. Remove the key fob's battery compartment cover (A). Utilizing a flat-head screwdriver or a thumb nail, push the cover upwards. Replace the CR2025. Dead Coin Battery If your key fob has stopped working and you're capable of reprogramming it with an entirely new code, the most likely reason is a dead battery in the coin. You can replace the battery yourself in less than ten minutes. Open the key first from the side, without the metal rings. There's a simple clip-on lid that you can open with your nail. The old battery will be pulled out through the hole in the middle. Note: Changing the battery improperly or using an unsuitable battery can damage the remote key. Always replace the battery with one that is the same size, voltage and specification as the original. If your key device was submerged in water it may be necessary to clean the chip prior to replacing the battery. This is especially true if it was dropped into the sea or in soapy water. It is crucial to do this immediately, as water can cause damage to the chip in your key fob's electronic. Worn Buttons Seat Ibiza keys stop working the majority of the time often because the coin battery is dead. This is easy to fix and takes only a few minutes. The key fob can also stop working if the buttons are worn out. This is also a simple fix and only requires you to swap out the old key shell for an entirely new one. It is crucial to replace the button cell battery correctly otherwise the key fob might be damaged. It is recommended to always make sure you use a new battery that is the same size, voltage, and specification. It's important that the polarity is up on the new battery. The key fob is secured by rubber seals, which should keep water out. The submersion of the keyfob could cause the seals on the keyfob to break, causing damage to the electronic chip. This is often the case when the key fob is placed in the rain or drops into the pool. If your key fob does not work after replacing it or reprogramming it, the receiver module may be faulty. Water Damage Rubber seals on the key fob block water from getting to the electronic chip. However this doesn't stop occasional splash or bath. If your fob has survived a wash cycle or swimming in the ocean it may have damaged the chip. It is possible to fix this by taking off the battery and cleaning the chip with isopropyl alcohol or an electronic cleaner. Let it dry completely before placing it back. If the chip is damaged and needs to be replaced, replace it with a new one. If your key fob still does not work after changing the battery and reprogramming it then it could be a problem with the receiver module. This is the part of the car that receives signals from the key fob and relays them to the key ignition system. You can test it by using a spare key fob in case you have one. This should cause the ignition system light come on and the central locking switch activate. If seat arona key doesn't, the receiver module may be defective. This is a costly fix but it can be done by a professional in your local garage. Radio Interference The receiver module in your key could be causing interference. This can be corrected with a replacement key with a new receiver module from Seat parts. To replace the battery, flip off the key piece and using your thumb nail or a screwdriver that has a flat head, gently pry upwards the key fob battery compartment cover. Remove the CR2025 battery and insert a new one, making sure it is in the correct direction of operation. You can also use an ordinary key with a transponder chip which was previously installed on a worn or damaged key. It can be coded and cut to fit your car and, if required. Faulty Receiver Module The receiver module is the part in the key fob that transmits radio signals to the car. The module may be damaged in the event that the fob stops working. It is possible to determine this by using an OBDII scanner tool or by calling your dealer. The remote keyless entry system is susceptible to interference from other devices that operate on the same frequency. This can include mobile phones, electrical devices, and even household appliances. If the key fob is in contact with clean tap water, it could be possible to clean the chip using paper towels and isopropyl Alcohol. If the fob's key was submerged in soapy or salty water or left for a long time on a surface that is wet, it will almost certainly be damaged and will need to be replaced. To replace the battery in your key fob using the thumb nail or flat-head screwdriver to prise open the cover of the button cell compartment (B). Remove the old battery. Replace it with a brand new CR2025, ensuring that the “+” polarity is facing up.