Why a Seat Ibiza Replacement Key Won't Work
A new generation of driver aids take the Ibiza to a whole new level. Travel Assist ensures that your vehicle keeps pace with traffic while Lane Assist eliminates the stress of changing lanes.
Remove the key fob's battery compartment cover (A). Utilizing 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 isn't working but you're not able to reprogram it with the latest code, the most likely cause is a dead battery in the coin. You can replace this battery yourself within a matter of ten minutes.
Flip the key open first from the side, without the rings made of metal. It is possible to open the clip-on lid with your nail. The old battery is then pulled through the hole in the middle. Note: If you change the battery in error, or with a battery not suitable, it could harm the remote. Always replace the battery using one with the same size, voltage and specification as the original.
Alternatively, if your key fob was submerged in water, it could need to clean the chip before replacing the battery. This is particularly important especially if you've dropped it into the ocean or in soapy washing water. This must be addressed immediately because exposure to water could damage the electronic chip and cause your key fob to stop functioning.
Worn Buttons
The most frequent reason why a Seat Ibiza replacement key stops working is due to the coin battery being dead. It's a simple fix that takes only few minutes. The key fob will also cease to function if the buttons are worn. It is simple to fix the issue that requires you to replace the old key shell with the new one.
It's important to note that the button cell battery needs to be replaced correctly or damage may occur to the key fob. It is recommended to always make sure you use a new battery of the same size, voltage, and specification. It's also crucial that the polarity of the new battery is directed upwards.
The key fob is protected by rubber seals, which should keep water out. However submerging the keyfob in water can cause the seals to crack and harm the electronic chip inside. This happens most often when you accidentally drop your key fob into the pool or leave it in the rain. If the key fob doesn't work after reprogramming or replacing it or replacing the receiver module, it could be damaged.
Water Damage
The key fob is fitted with rubber seals to stop water getting to the chip inside. However, this doesn't stop the occasional splash. If your pet has survived a wash cycle, or a swim in the ocean it could have damaged the chip.
It is possible to fix this by taking the battery off and cleaning the chip using isopropyl ethanol or electronic cleaner. Then, let it dry completely before replacing it. If the chip is damaged, it will need to replace it with a brand new chip.
If your key fob doesn't work despite changing the battery or reprogramming it, the issue could be with the receiver module. This is the part of the car that receives signals from the key fob, and then sends signals to the key ignition system. If you have a spare key fob you can test it. The central locking should activate and the ignition system light should be lit. If this does not occur, then the receiver module could be defective. This is a costly fix but it can be fixed by an expert at your local garage.
Radio Interference
The receiver module in your key could be causing interference. Seat parts can provide a replacement key that has a new receiver.
To replace the battery, take off the key and gently lift the cover of the key fob's battery compartment with your thumb or a flat-headed screwdriver. Remove the CR2025 battery and insert a fresh one, making sure it is fitted with the correct direction of operation. You can also use a standard-sized key with the transponder chip transferring from the damaged or worn key. This can be coded and cut to fit your car as needed.
Faulty Receiver Module
The receiver module is the part on the key fob, which transmits the radio signals to the car. If the fob doesn't work, it could be that the module is malfunctioning. This can be detected using an OBDII scan tool or by calling the dealer.
The remote keyless entry system is susceptible to interference from other devices that operate at the same frequency. replacement seat key could include mobile phone transmitters, electrical devices, and even some household appliances.
If the fob is exposed clean tap water, it might be possible to clean the electronic chip with paper towels and isopropyl ethanol. If the fob's key is submerged in salt or soapy water, or is sat on a floor that is wet for long periods, it will almost certainly cause damage and is likely to require replacement.
To replace the battery in 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 battery that was in place. Replace it with a brand new CR2025, ensuring that the "+" polarity is facing up.