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Key Fob Replacement for the Seat Ibiza This fifth-generation Ibiza, which has been redesignated is a serious contender for the supermini segment. It is up against the Renault Clio, Peugeot 208 and Ford Fiesta. With a thumb nail, or a small screwdriver with a flat-headed head (A) and pull upwards the key fob compartment cover (B). Replace the CR2025 coin battery, making sure it is fitted in the proper direction and polarity. Dead Coin Battery The most common reason for a key fob that does not lock or unlock your car is due to a dead coin battery. Before it dies you'll see the decrease in range or no power. It is simple to replace it with a new (CR2025) one from your local store. Be aware that faulty or defective batteries could damage the key fob. Make sure that the battery you purchase is identical in size, specifications and voltage as your old one. If your fob was exposed to clean water, like rainwater or soapy water from the tap It is likely that corrosion has caused damage to the electronic chip. You could try cleaning the chip with isopropyl alcohol or an electronic cleaner to test if it helps, but it is likely the chip is damaged. The most straightforward solution is to buy a new key fob. Most major car dealers offer key fobs and they can be installed by a skilled mechanic. You can also buy them online, such as on eBay. The best method is to work on a flat surface that has adequate lighting. This makes it easier to work on the small parts inside. You'll also be able to avoid putting things in the wrong place. Always work on your key fob in a location that is safe and secure. Water Damage You may think that your key fob is lost if you drop it in an unintentional pool or accidentally wash it. There's a chance. When the circuit board in the fob is exposed to water, it turns into conductor that shorts the components. It also increases corrosion and rust. Luckily, this is simple to fix. Find something absorbent to place inside the fob. A tissue or paper towel will be a good choice. Use seat key replacement price swab that contains isopropyl to clean the circuit board and any other components. Let the circuit board dry for a few days in a dry, warm environment. Once the fob is dried out and the battery is replaced with another one of the same size and polarity ('+' pointing upwards). The fob might be difficult to open to get to the battery, however If you have a flat-head screwdriver at hand it will be a breeze to slide in. Once the fob is assembled it should function as usual. If it doesn't, you may have to reprogramme it or replace the receiver module. Radio Interference When a key fob is functioning correctly, it transmits the radio frequency signal which is received by the module in your car. If the signal is not received the key fob will not function. This could be due to objects or weather conditions, or other transmitters operating at the same frequency close to your vehicle. This could cause your key fob to not be able to activate the vehicle's functions, such as the ignition switch, or the security system. In this instance, it would be best to replace the battery in your key fob. A few LED lighting aftermarkets which uses the same frequency as a key fob for remote control could interfere with the signal, stopping it from reaching receiver modules. To avoid interference, the LED lighting should be turned off or switched to an alternative frequency. If the issue continues to persist after installing a new battery, the antenna on your key fob may be damaged or inoperable. The antenna is responsible to transmit a signal 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 the vehicle you own, such as the make and model as well as the engine type and VIN number. Faulty Receiver Module The key fob has the receiver module which transmits the signals for locking and unlock. All electronic components on board will stop working if this module has a problem. Reprogramming the key fob using an OBDII scan or replacing it could help. This problem can be caused by a dead battery in the coin-cell or a water damage or signal interference. You can try resetting the on-board computer by disconnecting the battery 12 volts for 15 minutes. This will flush out any residual power that may be causing issues. Take the cable off first of the negative terminal, then from the positive terminal. After 15 minutes, connect your battery in reverse order. Positive first, then negative next. Water or dirt can also damage the internal chip of the key fob. If your key fob stopped functioning after getting wet, wipe it with isopropyl or electronic cleaner. Then, you can reinstall the battery. If it is not working after exposure to soapy or salty water the chip could be damaged and needs to be replaced. Another possibility is a faulty antenna module fuse that transmits the lock or unlock signal to the vehicle. The fuse can be found in a variety of places, based on the type of vehicle. For instance it could be located under the rear seat, or in the trunk, or the side of the dashboard.