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Citroen C3 Key Fob Replacement If the key fob on your C3 stopped suddenly, it could be due to a faulty receiver module. If the key fob still is working it could be due to another issue, such as water damage or a dead battery. Citroen is aiming to reach the mass market with its eC3. It has a range of features, such as remote diagnostics through virtual computers and a dedicated customer service app. Dead coin battery If the key fob's unlock button doesn't working, there is an issue with the battery of the coin. The battery should last between three and four years with regular use but it is possible to die unexpectedly. The automakers have created fail-safes which allow you to lock and start your car even if the key fob is dead. The battery inside the key fob is secured by clips made of metal that form a circuit. The battery may not be powered if these clips are dirty or worn. The battery should be the right size and type. If the battery is too small or too large it will not fit on the fob and will not function properly. Key fob batteries are often sold under various names, including CR2016 and CR2032 (though they're not interchangeable). Read the owner's guide for your particular model or look for a sticker on the fob that has the details. If you've got the right battery, you can swap it in a matter of minutes. Most fobs have a slider, switch, or gap that you can use to pry open the cover to swap out the original battery for an alternative. Make sure the new battery is the same voltage and that it is placed in the correct position. Water damage Even even if your key fob has survived the wash cycle or an immersion in the pool, water is not good for electronics. It can damage batteries and cause serious damage to the electronic chip inside. There are a few things you can do to minimize the damage. It's crucial to first eliminate the battery first, and then dry out the interior as possible. You can also clean the battery using a cotton swab which is dipped in 90 percent alcohol. After you have cleaned the key fob, you must let it dry for several days. You can accelerate the process by placing it on a high shelf that isn't disturbed. Once you're sure that it is bone dry, put in a new battery and using it in the same way as you normally would. If your key fob still not working, it could be that the receiver module in your car is faulty and isn't able to transmit signals. This could be expensive to fix, but it's definitely worth trying if you want to avoid a costly replacement. The most straightforward solution to fix a broken key fob, is to replace the battery. The battery change will bring back the radio signal and make your key fob work again. However, if the problem persists then you should seek out assistance from a professional. Receiver module that is defective In certain cases, a defect in the receiver module of the key fob might cause it to stop receiving or transmitting proper signals. In this scenario, the car will not recognize the remote control key. It won't unlock or start. In this case, a replacement remote control will be needed. Read the owner's manual before attempting to reprogram the key fob on your own. Make sure that the battery of the key fob is in good shape and that all buttons work. Also, shut the doors and disconnect any additional devices such as alarm systems or radios from the vehicle. replacement citroen key can also clean the chip by using isopropyl or electronic cleaner. If the chip is fried it will likely need to be replaced. Once you've cleaned the key fob, you can remove its circuit board. Then use alcohol swabs to clean the contacts and let them air dry. After the contacts have dried, you can reassemble the key fob and test it. If it's still not working you may have to replace the battery. Make sure you choose the new battery with the same voltage as your old one. It is also a good idea to check that the battery is installed correctly, as the contact points can be very sensitive. Faulty keyless entry systems The key fob is a wonderful convenience in cars However, it can be frustrating when it ceases to function. The good news is that, most times it's easy to get it back up and running. The most frequent cause of a malfunctioning key fob is a dead coin battery, which can be replaced in a matter of minutes. Other reasons include signal interference, the receiver module is defective and other electrical issues. The first thing to do is to ensure that the battery has the correct voltage and that it is correctly installed. It is also important to use the correct type. Using a wrongly sized, or polarized batteries could harm the internal circuitry. You should also examine the fuses to ensure they're not blowing or have not been melted. Another possible problem is that the transponder inside the key could have been damaged or gone missing. This is a scenario that requires further testing by a car dealer or a professional mechanic. Many dealerships and auto locksmiths can reprogram a car's key fob for a fee, however this can be costly. If you have an extra key, it may be worth trying to reprogram the fob yourself. In the majority of cases, you will find instructions in the owner's manual. If you don't have the manual you can search for instructions online or on YouTube. Before attempting to repair the key fob, it is essential to read the owner's guide.