Why a Seat Ibiza Replacement Key Won't Work
The Ibiza is now fitted with a brand new generation of driver assistance. Travel Assist ensures that your vehicle keeps pace with traffic while Lane Assist eliminates the stress of changing lanes.
Remove the key fob cover for the battery compartment (A). Utilizing a flat-head screwdriver or a thumb nail, push the cover upwards, then replace the CR2025.
Dead Coin Battery
If your key fob isn't working and you are unable to reprogram it the most likely cause is the battery is dead. It is possible to replace the battery yourself in less than 10 minutes.
The key is opened 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 is moved 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 cause damage to the remote. Replace the battery using the same voltage, size and specifications as the original.
If your key fob was submerged by water, you might also need to clean the chip prior to replacing the battery. This is particularly important if you've dropped it in the ocean or in soapy wash water. This should be done immediately as exposure to water can damage the chip's electronic circuit and cause your key fob to stop working.
Worn Buttons
Seat Ibiza keys stop working the majority of the time often because the battery is dead. It's a straightforward fix that only takes several minutes. The key fob will also cease to function if the buttons are worn. It's a simple fix that only requires replacing the old key shell with a new one.
It is crucial to replace the battery of the button cell correctly or the key fob could be damaged. It is recommended that you always use a new battery with the same size, voltage, and specifications. It's also crucial that the polarity of the new battery is in the direction of upwards.
Rubber seals should protect the key fob. However when you submerge the key fob in water can cause the seals' to break and damage the chip inside. This is often the case if your key fob is placed in the rain or accidentally drops into the pool. If seat arona key battery replacement fob doesn't work after replacing it or reprogramming it or replacing the receiver module, it could be in trouble.
Water Damage
Rubber seals on the key fob block water from getting to the chip. It is not enough to stop the occasional splash. If your pet survived a wash cycle or an ocean swim, it could have damaged the chip.
This can be corrected by removing the battery, and cleaning the chip using isopropyl or electronic cleaner. After drying, let it dry before returning it. If the chip is damaged it is necessary to replace it with a new one.
If your key fob still doesn't work after changing the battery and reprogramming it then it could be a issue with the receiver module. This is the part in the car that receives signals from the key fob and relays them to the key ignition system. It can be tested by trying the spare key fob if have one. The central locking should start to work and the ignition system light should come on. If this does not happen then the receiver module could be defective. This is a pricey fix, but it is possible to fix by a professional in your local garage.

Radio Interference
If your car's radio appears to be acting oddly or the key fob not working, it could be caused by an interference issue with the receiver module in the key. Seat parts can provide a replacement key that has a new receiver.
To replace the battery, unplug the key and gently lift the cover of the key fob's battery compartment with your thumb or a flat-headed screwdriver. Remove the old CR2025 battery and replace it with a brand new battery, making sure that the polarity of the battery is correct. You can also use a standard-sized key with the transponder chip which was transferred from the worn or damaged key. This can be coded and cut to fit your vehicle as needed.
Faulty Receiver Module
The receiver module that is in your key fob transmits radio signals to the car. If the fob isn't working, it could be that the module has become defective. This can be identified using an OBDII scanner device or by calling your dealer.
Other devices that operate on the same frequency may interfere with the remote keyless entry system. This includes mobile phones, electrical devices and even some household appliances.
If the key fob is in contact with clean tap water it may be possible to clean the chip with paper towels and isopropyl alcohol. If the fob is submerged in salt or soapy water or is placed on a wet floor for long periods of time, this will almost certainly result in damage, and it will likely require replacement.
To change the battery, you can use a small flat-head screwdriver or a fingernail for prying open the compartment that houses the button cell batteries (B). Remove the old battery and insert an CR2025 replacement battery, making sure the "+" polarity is directed upwards.