Why a Seat Ibiza Replacement Key Won't Work
The Ibiza is now equipped with a new generation of driver assistances. Travel Assist ensures that your vehicle is able to keep up with the traffic, while Lane Assist eliminates the stress of changing lanes.
Remove the key fob's battery compartment cover (A). By using a thumb nail or flat-head screwdriver, pull upwards to open the cover and replace the CR2025 battery.
Dead Coin Battery
If your key fob is not working and you aren't able to reprogram it the most likely reason is the battery is dead. You can replace this battery yourself in less than 10 minutes.
Flip the key open first from the side without the rings made of metal. There's a clip-on lid that is opened by a lever with your nail. The old battery can be removed via the hole in the middle. Be aware that changing the battery improperly or using an unsuitable battery can damage the remote key. Always replace the battery with one of the same voltage, size and specifications as the original.
In the event that your key fob is submerged in water, you might have to clean the chip prior to replacing the battery. This is especially important in the event that you've dropped it into the sea or soapy washing water. It's 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 battery is dead. It's a simple fix that only takes a few moments. The key fob can stop working if the buttons are worn. It's simple to fix the issue that will require you to replace the key shell that was used to replace it with an entirely new one.
It is important to remember that the battery for the button is required to be replaced in a timely manner or damage could be caused to the key fob. It is recommended that you always make sure you use a new battery of the same size, voltage, and specification. It's also important that the current battery's polarity is facing upwards.

The key fob is secured by rubber seals, which should keep water out. However submerging the keyfob in water could cause the seals' to break and damage the chip inside. This is usually the case if you accidentally drop your key fob in the pool or leave it in the rain. If your key fob isn't working, even after replacing it or reprogramming it, the receiver module may be faulty.
Water Damage
The key fob has rubber seals that prevent water from reaching the electronic chip inside. However it's not enough to stop the occasional bath or splash. If you've survived a wash cycle or an ocean dip the chip could be damaged.
This can be resolved by removing the battery, and then cleaning the chip with isopropyl or electronic cleaner. After drying, let it dry before placing it back. If the chip has become damaged, it will have to be replaced with a brand new one.
If your key fob isn't working after changing the battery and reprogramming it, then it could be due to a problem with the receiver module. This is the part of the car that receives signals from the key fob and transmits signals to the key ignition system. It can be tested by trying the spare key fob in case you have one. seat key battery locking should be activated and the ignition system light should come on. If this doesn't occur it is possible that the receiver module may be faulty. This is a costly fix however it can be repaired by an expert at your local garage.
Radio Interference
If your car's radio seems to be acting out of order or the key fob not working it could be caused by an interference problem with the receiver module inside the key. This can be corrected with replacing the key with a new receiver module purchased from Seat parts.
To replace the battery, pull out the key part and then using your thumb nail or screwdriver with a flat head, gently pull upwards the key fob's compartment cover. Remove the old CR2025 batteries and insert a new one, making sure that it has the proper direction of operation. You can also use a standard-sized key with the transponder chip that was transferred from the damaged or worn key. It can be cut and coded to your car, if needed.
Faulty Receiver Module
The receiver module that is in the fob that you have in your keys transmits radio signals to your car. If the fob isn't working it could be because the module has become defective. You can determine this with an OBDII scanner or by reaching out to your dealer.
The remote keyless entry system is vulnerable to interference from other devices that operate at the same frequency. This can include mobile phones, electrical devices, and even some household appliances.
If the key fob has been exposed to pure tap water, it might be possible for you to clean the chip with paper towels and isopropyl Alcohol. If the fob's electronic chip has been submerged in salty or soapy water or left for a long period of time on a damp surface, it is likely to be damaged and require to be replaced.
To change the battery, use a small flat-head screwdriver or a fingernail, to pry open the compartment that houses the button cell batteries (B). Remove the old battery, and replace it with a new CR2025 battery, making sure that the "+" polarity of the battery is directed upwards.