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Why a Seat Ibiza Replacement Key Won't Work
The Ibiza is now equipped with the latest generation of driver assistances. Travel Assist ensures that your vehicle is in sync with traffic while Lane Assist eliminates the stress of changing lanes.
Remove the cover for the battery compartment on the key fob (A). Using a thumb nail or flat-head screwdriver, prise upwards the cover, then 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 cause is the battery is dead. You can replace this battery yourself in less than 10 minutes.
Open the key first from the side without the rings made of metal. It is possible to open the clip-on lid by using your nail. The old battery can then be pushed out through the hole in the middle. Note: Changing the battery in a wrong manner or using an unsuitable battery could damage the remote key. Replace the battery with the same voltage, size and specifications as the original.
If your key fob was submerged in water, you may also need to clean the chip prior to replacing the battery. It is particularly important if the device was dropped in the sea or in soapy water. It is imperative to take action immediately, as exposure to water could damage the electronic chip and cause the key fob's functionality to cease.
Worn Buttons
The most frequent reason why for why a Seat Ibiza replacement key does not work is due to the battery of the coin being dead. It's a straightforward fix that only takes some minutes. The key fob can be inoperable if its buttons are worn. It is simple to fix the issue that will require you to replace the key shell that was used to replace it with the new one.
It's important to know that the button cell battery needs to be replaced correctly or damage can occur to the key fob. It is recommended that you always make sure you use a new battery of the exact size as well as the voltage, specifications, and size. It's crucial that the polarity is facing up on the new battery.
Rubber seals should keep water out of the key fob. However submerging the key fob in water may cause the seals to crack and damage the chip inside. This is usually the case if you accidentally drop your key fob into the pool or leave it in the rain. If your key fob doesn't work even after replacing it or reprogramming it, the receiver module may be faulty.
Water Damage
Rubber seals on the key fob stop water from getting into the chip. However it's not enough to prevent the occasional bath or splash. If you've survived a washing cycle or swimming in the ocean your chip might be damaged.
This can be fixed by removing the battery and then cleaning the chip using isopropyl or electronic cleaner. Let it dry completely before placing it back. If the chip is fried, it will need to replace with a brand new one.
If your key fob still does not work after changing the battery and reprogramming, there could be a issue with the receiver module. This is the part of the car which receives the signals from the keyfob. It then transmits the signals to the key ignition system. It can be tested by using the spare key fob, if you have one. The central locking should start to work and the ignition system light should illuminate. If this doesn't happen and the receiver is not working, then it may be faulty. This is a costly repair however it can be repaired by a professional at your local garage.
Radio Interference
The receiver module on your key could be causing interference. Seat parts can be used to provide a replacement key that has a new receiver.
To replace the battery, pull out the key part and using your thumb nail or screwdriver with a flat head, gently pull upwards the key fob's compartment cover. Remove the old CR2025 battery and then insert a brand new one, ensuring that it is in the correct polarity. You can also use a regular key that has transponder chips that were before on a worn or damaged key. This can be cut and coded to your car, if needed.
Faulty Receiver Module

The receiver module is the part inside the key fob which transmits the radio signals to the car. The module could be defective if the fob stops functioning. This can be determined using an OBDII scan device or by calling the dealer.
Other devices that use the same frequency may interfere with the remote keyless entry system. seat key cover can include mobile phones, electrical devices and even some household appliances.
If the fob is exposed to clean tap water, it might be possible to clean the electronic chip with paper towels and isopropyl ethanol. If the fob is submerged in soapy or salt water, or sat on a floor that is wet for prolonged periods, this is likely to cause damage and it is likely to need replacing.
To replace the battery in your key fob make use of your thumb nail or small flat-head screwdriver to prise open the cover of the button cell battery compartment (B). Remove the old battery. Insert a new CR2025 battery, making sure the "+" side is facing upwards.