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Why a Seat Ibiza Replacement Key Won't Work A new generation of driver assists take the Ibiza to a whole new level. Travel Assist makes sure your vehicle keeps up with traffic movements while Lane Assist takes the worry out of changing lanes. Remove the key fob battery compartment cover (A). With a flat-head screwdriver, or a thumb nail, pry the cover upwards and replace the CR2025. Dead Coin Battery If your key fob isn't functioning and you can't reprogram it, the most likely cause is a dead battery. The replacement of this battery should get it up and running and running again. You can do it yourself in less than 10 minutes. The key is opened by removing the rings made of metal. You can remove the clip-on cover using your nail. The old battery can be pushed out through the hole in the middle. Note: If you change the battery incorrectly, or with a battery not suitable, it could harm the remote. Always replace the battery using one with the same voltage, size and specification as the original. In addition, if the key fob you have purchased has been submerged in water, it could require cleaning the chip before replacing the battery. It's especially important if it was dropped in the sea, or soapy water. It is crucial to do this right away, as water could damage the electronic chip of your key fob. Worn Buttons Seat Ibiza keys stop working the majority of the time often due to the battery that powers the coin is dead. This is easy to fix and can be done in a couple of minutes. The key fob may stop working if the buttons are worn. This is a simple fix and it only requires you to swap the old keyshell for an entirely new one. It is important to replace the button cell battery in a timely manner, or the key fob could become damaged. It is recommended to always replace the battery with the same size, voltage, and specification. It's crucial that the polarity is facing upwards on the new battery. Rubber seals are designed to keep water away from the key fob. The submersion of the keyfob could cause the seals on the keyfob to break and damage the electronic chip. This is typically the case when the key fob is placed in the rain or drops into the pool. If seat leon key does not function after replacing or reprogramming it, then the receiver module could be in trouble. Water Damage The rubber seals on the key fob stop water from getting to the chip. However, this doesn't stop the occasional bath or splash. If you've gotten through a washing cycle or an ocean dip, the chip may be damaged. This can be fixed by removing the battery, and cleaning the chip using isopropyl or electronic cleaner. Let it dry completely and then put it back. If the chip has become damaged then it must be replace it with a new one. If your key fob still does not work after changing the battery and reprogramming, there could be a issue with the receiver module. This is the part in the car that receives signals from the key fob and relays signals to the key ignition system. You can test it by using the spare key fob if you have one. The central locking should turn on and the ignition system light should be lit. If this does not happen, then the receiver module could be defective. This is a costly fix but can be fixed by a professional at your local garage. Radio Interference The receiver module inside your key could cause interference. It can be fixed by a replacement key with the new receiver module made by Seat parts. To replace the battery, pull off the key piece and using your thumb nail or a screwdriver with a flat head, gently pull upwards the key fob battery compartment cover. Remove the CR2025 battery and insert a new one, ensuring that it has the correct polarity. You can also use a standard-sized key with the transponder chip transferring from the worn or damaged key. This can be cut and coded to your car in the event of need. Faulty Receiver Module The receiver module on your key fob is what transmits radio signals to your car. If the fob doesn't work it could be because the module has failed. You can determine this with an OBDII scanner tool, or by reaching out to your dealer. Other devices that utilize the same frequency can interfere with the remote keyless entry system. This can include mobile phone transmitters, electrical devices and even some household appliances. If the key fob is exposed pure tap water, it might be possible to clean the chip with paper towels and isopropyl Alcohol. If the fob's key has been submerged in soapy or salty water or sat for a long time on a surface that is wet, it will almost certainly be damaged and need to be replaced. To change the battery in your key fob make use of the thumb nail or flat-head screwdriver to prise open the cover of the button cell compartment (B). Remove the old battery and then insert an CR2025 replacement battery, making sure the “+” polarity is facing upwards.