Why a Seat Ibiza Replacement Key Won't Work
A newer generation of driver assist improves the Ibiza to a completely new level. Travel Assist ensures that your vehicle can keep up with the flow of the traffic, while Lane Assist eliminates the stress of changing lanes.
Remove the key fob's battery compartment cover (A). Utilizing a flat-head screwdriver or a thumb nail to pry the cover upwards. Replace the CR2025.
Dead Coin Battery
If your key fob isn't working and you can't reprogram it, the most likely cause is an inoperative battery. Replacing this should bring it back to life again - you can do it yourself in under 10 minutes.
The key is opened from the side with no metal rings. There's a simple clip-on lid, that you can lever open using your nail. The old battery can then be pulled out through the hole in the middle. Be aware that if you replace the battery in a wrong way, or using a battery that's not appropriate, it could harm the remote. Replace the battery using the same size, voltage and specifications as the original.
If your key fob was submerged in water, you could require cleaning the chip before replacing the battery. It's especially important if it was dropped into the ocean or in soapy water. It is imperative to take action immediately since exposure to water may damage the electronic chip and cause your key fob's functionality to cease.
Worn Buttons
Seat Ibiza keys stop working the majority of the time often because the battery is dead. This is easy to fix and can be done in a couple of minutes. The key fob also stops working if the buttons have worn out. It's a simple fix that only requires replacing the key shell that was used to replace it with an entirely new one.
It is important to replace the battery of the button cell correctly otherwise the key fob may be damaged. It is recommended to always make sure you use a new battery with the same size, voltage, and specification. It's also important to ensure that the polarity of the new battery is directed upwards.
Rubber seals are designed to keep water away from the key fob. However submerging the key fob in water may cause the seals to break and damage the electronic chip inside. This is usually the case if you accidentally drop your key fob in the pool or leave it in the rain. If the key fob does not work after replacing or reprogramming it and the receiver module could be in trouble.
Water Damage

The key fob has rubber seals that prevent water from reaching the chip inside. However, this doesn't stop the occasional bath or splash. If you've survived a wash cycle or an ocean dip your chip might be damaged.
This can be resolved by removing the battery, and then cleaning the chip using isopropyl or electronic cleaner. Let it dry completely and then put it back. If the chip has become damaged, it will need to be replaced with a brand new one.
If your key fob doesn't function after changing the battery or reprogramming it, the problem could be with the receiver module. This is the part of your car that receives the signals from the keyfob. It then transmits the signals to the key ignition system. You can test it by using the spare key fob in case you have one. The central locking should activate and the ignition system light should turn on. If this doesn't occur it is possible that the receiver module could be defective. This is a costly fix but it can be fixed by a professional at your local garage.
Radio Interference
The receiver module on your key could cause interference. Seat parts can be used to provide an alternative key with a new receiver.
To replace the battery, pull out the key part and using your thumb nail or screwdriver that has a flat head, gently pry upwards the key fob's compartment cover. Take off the old CR2025 and replace it with a new battery, ensuring that the polarity is correct. You can also make use of an ordinary key that has a transponder chip which was previously on a damaged or damaged key. This can be cut off and coded to your car, if needed.
Faulty Receiver Module
The receiver module is the part in the key fob that transmits radio signals to your car. If the fob isn't working it could be because the module has become defective. This can be identified using an OBDII scanner tool, or by calling your dealer.
The remote keyless entry system is vulnerable to interference from other devices that operate at the same frequency. This could include mobile phones, electronic devices, and even some household appliances.
If the fob is exposed clean tap water, it might be possible to clean the electronic chip using paper towels and isopropyl Alcohol. If the fob is submerged in salt or soapy water, or is sat on a wet floor for prolonged periods, this will most likely cause damage and it is likely to require replacement.
To change seat ibiza key fob on your key fob make use of the thumb nail or flat-head screwdriver to open the cover of the button cell compartment (B). Remove the old battery and insert the new CR2025, making sure the "+" polarity is directed upwards.