What to Do If Your Seat Ibiza Key Fob Stopped Working
You should check these things if your key fob suddenly stopped working or is not locking or unlocking your car. It could be that the battery needs replacing or the electronic chip is faulty.
The Ibiza is Seat's most well-known model and is competing with the Renault Clio, Peugeot 208, Ford Fiesta and Vauxhall Corsa in the popular supermini market. It's also a fantastic value.
Battery
The most common reason for a key fob not working is a dead battery. The battery used in the fob is a 3V lithium button-cell battery (CR 2032). This battery is available at retailers or online. Replace car seat key with a new one that is similar in size, shape and specification. A battery of a different design could harm the fob.
The battery is secured inside the fob by metal clips that bind it, creating an electric circuit when the remote is activated. If they're loose or dirty, they might cause a short and stop the remote from working. Use isopropyl or electronic cleaners to clean them.
To replace the battery, just open the fob and look for an opening in the middle in which you can insert a screwdriver, or other tool to pry it apart. Remove the battery and replace it with a brand new one, ensuring it is fitted in the same direction as the old one. The fob will then shut itself automatically. It is essential to test the fob to be sure it functions properly after replacing the battery.
Water Damage

If you dropped your key fob into the pool or threw it into the washer and it stopped working, it might be suffering from water damage. The electronic chip in the key fob is protected by rubber seals, but prolonged exposure to water can deteriorate the quality of these seals over time. Water is also a good conductor, which can cause short-circuits in the key fob.
Fortunately, the key fob battery is easy to replace. Using a small flat head screwdriver (or thumb nail) prise open the cover of the key fob's battery compartment and then insert a new button cell battery CR2025. Make sure that the polarity of the battery is facing upwards. Close the compartment for the key fob battery and the remote is reprogrammed to work with your car.
If your key fob still has issues after replacing the battery and reprogramming it, then it's possible that the receiver module has developed a fault. The receiver module is the component that receives signals from the key fob and transmits the signals to your car in order to control the engine, ignition and central locking.
Faulty Chip
If your Seat Ibiza key fob stopped working, it could be a problem with the chip inside it. It could happen if drop it or get it wet. This could also happen when the buttons have worn out or damaged. If this is the case, you'll require replacing the key fob or bring it to a specialist to repair it.
The key fob is made with rubber seals in order to prevent water from leaking into the electronic chip inside. It could be damaged when submerged in salt water or exposed to water for a long period of. This can happen due to swimming on the beach or in the rainstorm.
If you have been unable to repair your Seat Ibiza's key fob and have tried all other methods to fix it the best option is to buy a replacement. This can be relatively cheap depending on the model and brand of your vehicle. However, it could be a challenge to install it. If you are able, contact your dealer to find out how to program the key.
Faulty Receiver Module
If the key fob stops working after all other steps (including replacing the battery and reprogramming) this could be an indication of a problem with the receiver module. This is a small black box that is inside the key fob which sends the signal needed to control the keyless system in your car.
The most common reason for the receiver module to stop functioning is a dead battery for the coin. If this is the situation it is recommended that the battery be replaced first. Make sure that the new battery has the same size in terms of specifications, and voltage as the original one.
Another issue that is common is water damage. If your fob was exposed to clean water, like rain or tap water then this shouldn't be a problem. However in the event that the water was dirty, soapy, or salty and saline, it could have damaged the chip. Before reusing the fob, it is advisable to open it up and check all mechanical parts for signs of damage or corrosion. It is also advisable to check the wiring and ensuring that it is connected correctly.
Radio Interference
If the key fob's signal is interrupted by interference, it may prevent the vehicle from responding to the remote control. This can be caused by several factors like radio transmissions coming from other devices operating within the same frequency band as the key fob. Signals that are too strong could also cause the signal to become unreadable.
The most common reason for the key fob that does not function is a dead coin-cell battery. This must be investigated first. If the key fob has been replaced with a battery recently however the range has decreased, this is an indication that the battery has damaged.
It is recommended that you only use new batteries to replace, and to ensure the proper voltage and size. It is also recommended to ensure that the polarity of the battery is facing in the same direction when it is inserted. This will prevent damage to the chip inside the key fob. If the battery has suffered water damage the chip could require cleaning with isopropyl, or electronic cleaner.