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This fifth-generation Ibiza that has been redesignated is a serious contender for 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) and pull upwards the key fob compartment cover (B). Replace the CR2025 coin battery, making sure it is fitted in the correct direction and in the right polarity.

Dead Coin Battery

A dead coin battery is the most common cause of a key fob not locking or unlocking your vehicle. It usually shows warning signs prior to dying such as a decreased range or no power at all. It is easy to replace it with a new (CR2025) one from your local supermarket. Be aware that faulty or defective batteries could damage the key fob. Be sure that the replacement battery is the same size and voltage as well as the same specifications.

If your fob was exposed to clean water such as rain or soapy tap water, it is possible that the electronic chip inside has been damaged by corrosion. You could try cleaning the chip with alcohol or an electronic cleaner to test if it helps, but it is likely that the chip has been damaged and fried.

The most simple option is to buy an entirely new key fob. They are readily available from major car dealers and are installed by a qualified mechanic. You can also purchase them online, for example on eBay. It is recommended to work on a work surface that has adequate lighting. It is much easier to work on small parts. This will also help you to avoid placing anything back in the wrong location. Always keep your key fob in an area that is secure and safe.

Water Damage

If your key fob is submerged after dropping it into the pool or slipping it in the washing machine, you may think it's over, but there's hope. When the circuit board inside the fob is exposed to water, it turns into a conductor which shorts the components. It also speeds up corrosion and rust.

This is an easy solution. Simply locate something absorbent and place it inside the fob. A paper towl or tissue can be used. Then apply the cotton swab, dipped in isopropyl ethanol to wipe down the circuit board and other components to clean out any battery acid residue and contamination. Allow the circuit board to air dry in a warm, dry environment for several weeks.

Replace the battery when the fob has dried with a new one that has the same size and polarity ('+' (pointing upwards). It can be difficult to open up the fob in order to access the battery, however if you have a small screwdriver that is flat at hand, it will slide in easily. Once the fob is assembled and working, it should operate as usual. If it isn't working, you may have to program it again or replace the module.

Radio Interference

If a keyfob works properly, it broadcasts a radio signal that is absorbed by a receiver module in your car. If the signal is interrupted in any way your key fob will not function as expected. This could be due to objects or weather conditions, or other transmitters operating on the same frequency near your car.

This can cause your key fob to not be able to activate the vehicle's functions for example, the ignition switch or the security system. It is best to replace the battery of your key fob.

A few LED lighting aftermarkets that utilizes the same frequency as key fobs for remote control may interfere with the signal, stopping it from reaching receiver modules. The LED lighting must be switched off or changed to a different frequency in order to prevent interference.

If the issue persists after installing a new battery, the antenna of your key fob may be damaged or inoperable. The antenna is responsible for transmitting signals between the key fob and the receiver module. Using an OBDII scanner can assist in diagnosing the problem by revealing what's wrong with the system. The scanner will ask you for details about your vehicle including the model, make, engine type and VIN number.

Faulty Receiver Module

The key fob comes with a receiver module that transmits signals for locking and unlocking. All electronic components that are on-board will stop working if the receiver module becomes inoperable. If this is the case, reprogramming with an OBDII scanner or replacing the key fob itself could assist.

This issue could be caused by a dead battery in the coin-cell or a water damage or signal interference. You can reset your on-board computer by disconnecting the 12 volt batteries for about 15 minutes. This will drain any remaining power that could cause issues. Remove the cable first from the negative terminal, then the positive terminal. After 15 minutes, connect the battery in reverse order beginning with positive first, and negative second.

The internal chip in the key fob can also be damaged by dirt or water. If your key fob stopped functioning after being soaked, clean it with isopropyl or electronic cleaner. Then reinstall the battery. If it has stopped working after exposure to salty or soapy water the chip is likely fried and will need to be replaced.

Another possibility is an inoperable antenna module fuse that is sending the signal to lock or unlock to the vehicle. The fuse can be found in a variety of places, based on the model. For example it could be located under the rear seat alhambra key programming or trunk, or on the side of the dashboard.