Don't Buy Into These "Trends" Concerning Seat Mii Replacement Key Key Fob Replacement for the Seat Ibiza

This fifth-generation Ibiza, which has been updated and is a contender in the supermini segment. It competes against the Renault Clio, Peugeot 208 and Ford Fiesta.

Using a thumb nail or small screwdriver that has a flat head (A) lift upwards the key fob battery compartment cover (B). Replace the CR2025 batteries, making sure it is installed in the correct direction.

Dead Coin Battery

The most frequent reason for a key fob to not allow you to lock or unlock your car is due to a dead coin battery. It will usually show signs before it dies like a decrease in range or no power at all. It is easy to replace it with a new one (CR2025) from a local supermarket. It is important to be aware that using the wrong or incompatible batteries can cause damage to your key fob. Make sure that the new battery has the same size, specification and voltage as your old one.

If your fob was exposed to clean water, like rain or soapy tap water it is possible that the chip inside has been damaged by corrosion. You can clean the chip using isopropyl or electronic cleaners to see if that helps, but that the chip has been damaged.

A new key fob is the simplest solution. They are available at most major dealerships and can be fitted by a professional mechanic. They can also be bought on the internet from sites like ebay. The best way to work is to work on a flat, level surface with excellent lighting. It is much easier to work on small parts. It also allows you to avoid placing things in the wrong spot. Always keep your key fob in an area that is secure and safe.

Water Damage

You may think your key fob is damaged if you drop it in an unintentional pool or accidentally wash it. But there's a way to salvage it. The issue begins when the circuit board within the fob comes in contact with water. It creates a fantastic conductor and shorts out components. It also increases corrosion and rust.

Fortunately, this is easy to fix. Find something absorbent to put inside the fob. A tissue or paper towel will be ideal. Then make use of the cotton swab, dipped in isopropyl alcohol to clean the circuit board and other components to get rid of any battery acid residue and contamination. Allow the circuit board to air dry in a warm, dry environment for a few weeks.

Replace the battery once the fob is dry with a fresh one that is the same dimensions and polarity ('+' (pointing upwards). It can be tricky to open up the fob to reach the battery, but if have a small screwdriver that is flat available, it should be able to slide into easily. Once the fob has been put back together, it should work as normal. If it fails you may need to program it again or replace the module.

Radio Interference

When a key fob working correctly, it sends a radio frequency signal, which is interpreted by the receiver module inside your car. However, if the signal is disrupted in any way, your key fob won't perform as it should. This could be due to weather conditions, objects or other transmitters operating on the same frequency near your car.

In this situation it is best to replace the battery in your key fob. In this situation it is recommended to replace the battery on your key fob.

Some LED lighting from the aftermarket that utilizes the same frequency as the remote key fob may interfere with the signal and stop it from reaching the receiver modules. To avoid The Keylab , the lighting must be turned off, or to a different frequency.


If you have a new battery in your key fob, and the problem persists, it is possible that the antenna of your key fob is damaged or inoperable. The antenna is responsible for transmitting a signal between the key fob and the receiver module. A scan of the OBDII can help diagnose the problem by telling you exactly what's wrong with your system. The scanner will ask you for details about your car, including the model, make and engine type as well as the VIN number.

Faulty Receiver Module

The key fob is equipped with the receiver module which transmits the signals needed to lock and unlock. If the receiver module is damaged, all of the on-board electronics will cease to function. If this is the case, reprogramming with an OBDII scanner or replacing the key fob itself could help.

There are several possibilities for the cause of this problem, including a dead coin battery, water damage or signal interference. You can reset the on-board computer if you disconnect the 12 volt batteries for about 15 minutes. This will draw out any remaining power that could cause issues. Begin by removing the cable from the negative terminal of the battery first, followed by the positive terminal. After 15 minutes, reconnect the battery in reverse order first: positive, then negative second.

Dirt and water can damage the internal chip of the key fob. If your key stopped working after being wet, clean the electronic component with isopropyl alcohol or an electronic cleaner prior to installing the battery. If it is not working after exposure to soapy or salty water the chip may be fried and will need to be replaced.

A damaged antenna module fuse could also be the cause. This is the fuse that transmits an alert to the vehicle to lock or unlock. Depending on your model, the fuse is located in a variety of places such as the engine bay, the side of the dashboard, under the rear seat, or in the trunk.