If your key fob stopped working suddenly or it isn't locking or unlocking the vehicle, there are things you should look for. The battery could need to be replaced or the electronic chips could be faulty.
The most well-known model from Seat is the Ibiza that competes with the Renault Clio and Peugeot 208 in the supermini market. It's also a fantastic value.
Battery
A dead battery is the most frequent reason why a key fob ceases functioning. The coin battery on the fob is an 3V lithium button cell battery (CR 2032) that is available in many retail stores and online. Replace the old battery with new ones that are the same size, model and specifications. A battery of a different type can damage the fob.
The battery is held within the fob by clips that hold it in place, which form an electrical circuit when the remote is activated. If they are damaged or dirty, they could cause a short and prevent the remote from working. Clean them with isopropyl alcohol or electronic cleaner.
To change the battery, you will need to open the fob. You can do this by inserting a screwdriver through the hole. Replace the battery with a brand new one. Be sure to place it in the same direction. The fob will then close itself. It is important to test the fob in order to make sure that it functions correctly after changing the battery.
Water Damage
If you dropped your key fob in the pool or threw it into the washer and it didn't work, it could be suffering from water damage. The chip inside the key fob is protected by rubber seals however prolonged exposure to water can cause deterioration of the seals over time. Water is also a powerful conductor, which can cause short-circuits to the key fob.
The battery in the key fob can be easily replaced. By using a small flat screwdriver (or thumb nail) break open the cover of the key fob battery compartment and insert a new button cell battery, CR2025. Ensure that the polarity is facing upwards. Close the key fob battery compartment to re-programme the remote so that it will work with your car.
If your key fob has a problem after replacing the battery and reprogramming it then it's possible that the receiver module has developed an issue. The receiver module receives the signals from your key fob and sends them into your vehicle to control the central locking, ignition, and engine.
Faulty Chip
Seat Ibiza keyfobs that stop working could be due to chip problems. It could happen when it is dropped or soaked. This can also happen when the buttons have worn out or damaged. If this is the case, you will have to replace the key fob or send it to a specialist for repair.
The key fob has been designed with rubber seals to prevent water from getting to the chip inside. It can be damaged by submersion in salt water or exposed to water for an extended period of time. This could be caused by a swim on the beach or a rainstorm.
If you're having issues with your Seat Ibiza key fob and have tried everything else to fix it you might need to purchase a replacement. It can be fairly inexpensive depending on the model and make of your car. It could be a hassle to install. If you are able, contact your dealer to learn how to program the key.
Faulty Receiver Module
If the key fob ceases working after all other steps (including battery replacement and reprogramming), this could indicate a fault in the receiver module. This is a tiny black box inside the key fob that sends the signal needed to control the keyless system in your car.
Dead coin batteries are a common reason for receiver modules not working. This is the first thing that needs to be replaced in the event of this happening. Make seat ibiza key fob that the new battery has the same specifications, size and voltage as the prior one.

Another issue that is common is water damage. If your fob was exposed to pure water, like tap water or rain it shouldn't pose an issue. However should the water be dirty or soapy and saline, it could have caused damage to the chip. It is advisable to open up the fob and inspect the mechanical parts for indications of corrosion or damage before attempting to use it again. Verify the wiring to make sure it's properly connected.
Radio Interference
If the signal of the key fob is disrupted by interference it may prevent the vehicle from responding to the remote control. This could be due to various factors such as radio transmissions from other devices that operate within the same frequency band as the key fob. Signals that are too strong might also cause the signal to become unreadable.
The most frequent reason for the key fob that does not function is a dead coin cell battery. This should be checked first. If the key fob been replaced with a battery recently and the range has diminished this could indicate that the battery is worn out.
It is advised to use a new battery when you need replacement and make sure that the correct size and voltage is used. It is important to make sure that the direction of the polarity is the same direction as the battery when it is put in. This will help prevent damage to the electronic chip that is inside the key fob. If the battery has been exposed to water damage the chip could have to be cleaned with isopropyl alcohol or an electronic cleaner.