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Key Fob Replacement for the Seat Ibiza The fifth-generation Ibiza is redesigned, is a contender for the supermini segment. It competes against the Renault Clio and Peugeot 208 as well as the Ford Fiesta. Utilizing a thumb nail or small flat head screwdriver (A) to lift up the key fob battery compartment cover (B). Replace the coin battery CR2025 to ensure that it is in the correct direction and in the right polarity. Dead Coin Battery The most frequent reason for a key fob to not unlock or lock your car is a dead battery. It is likely to show indications before it dies, such as a decreased range or no power at any time. It is easy to replace it with a fresh one (CR2025) from a local store. Be aware that incorrect or unsuitable batteries can damage the key fob. Make sure the battery you replace is the same size and voltage and has the same specifications. If your fob was exposed to clean water, for example rainwater or soapy water from the tap, it is likely that corrosion has caused damage to the electronic chip. You can clean the chip with isopropyl or electronic cleaners to see if it can help, but the chip is damaged. The most efficient option is to buy an entirely new key fob. Most major car dealers offer them and they can be installed by an experienced mechanic. You can also purchase them online, for example on eBay. The best thing to do is to work on a level surface with adequate lighting. It is easier to work with small pieces. This will also allow you to avoid putting anything back in the wrong spot. Always work on the key fob in a secure and safe area. Water Damage If your key fob gets damaged by dropping it in the pool or by slipping it in the wash, you may think that it's gone but there's hope. The problem starts when the circuit board inside the fob comes in contact with water – it creates a fantastic conductor, and it shorts out the components. It also accelerates corrosion and rust. This is an easy solution. Simply locate something absorbent and place it inside the fob. A paper towl or tissue work well. Use a cotton swab that contains isopropyl for cleaning the circuit board and any other components. Let the fob air dry in a dry, warm environment for a few weeks. Once the fob is been drained then replace the battery with an alternative of the same size and the same polarity ('+' directed upwards). The Keylab is a challenge to open up the fob to access the battery, however if you have a small flat-head screwdriver handy it should slide in easily. After the fob is put back together, it should work as normal. If it doesn't, you may require reprogramming it or replace the receiver module. Radio Interference When a key fob is functioning properly, it sends an audio frequency signal that is picked up by the receiver module in your car. If the signal is distorted in some way the key fob will not perform as it should. This can be caused by objects such as weather conditions, objects, or other transmitters that operate on the same frequency near your vehicle. This could cause your key fob to not activate the vehicle's functions like the ignition switch, or the security system. In this case it is recommended to replace the battery inside your key fob. A few aftermarket LED lighting fixtures that uses the same frequency as a remote key fob might interfere with the signal and prevent it from reaching the receiver modules. To avoid interference, the lighting must be turned off, or to another frequency. If you've got a new battery in your key fob, and the issue persists, it's possible that the antenna on the key fob is damaged or inoperable. This is significant because the antenna is responsible for transmitting a signal from the key fob to the receiver module. An OBDII scan will aid in diagnosing the issue by telling you exactly what's wrong with your system. The scanner will request details about your vehicle including the make and model along with the engine type and VIN number. Faulty Receiver Module The key fob houses an electronic receiver that sends the signals to lock and unlock. All electronic components on board will cease to function if this module has a problem. If this is the case Reprogramming using an OBDII scanner or replacing the key fob may help. There are several possibilities for the cause of this problem which could be due to a dead coin battery, water damage, or signal interference. You can reset the onboard computer by disconnecting the 12 Volt batteries for 15 mins. This will draw out any remaining power that could be causing issues. Begin by removing your cable from the negative terminal first, then the positive terminal. After 15 minutes, you can reconnect your battery in reverse order. Positive first, then negative second. Dirt and water can harm the internal chip of the key fob. If your key's function stopped after it got wet, you need to clean the electronic component with isopropyl ethanol or an electronics cleaner before installing the battery. If the key stopped working after exposure to soapy or salted water, it is likely that the chip has been damaged and needs to be replaced. Another possibility is a defective antenna module fuse that transmits the lock and unlock signal to the vehicle. Based on the model you have the fuse can be found in a variety of locations, such as the engine bay, side of the dashboard, beneath the rear seat, or trunk.