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Citroen C3 Key Fob Replacement If your C3's key fob stops functioning suddenly, it could be due a defective receiver module. If the key fob's function is functioning, the issue could be due to something else, like water damage or a dead coin battery. citroen car keys is aimed at the mass market, and Citroen has worked to make the service accessible to customers. It has a range of features including virtual remote diagnosis as well as an app that is specifically designed for customer service. Dead coin battery If the key fob's unlock function isn't functioning, there could be an issue with the battery of the coin. The battery is expected to last between three and four years if used regularly but it is possible to die in a sudden manner. The car manufacturers have developed fail-safes that let you start and lock the car even if the key fob is dead. The battery in the key fob is secured with clips made of metal, which complete a circuit. The battery may not be charged if the clips are dirty or worn. Also, the battery needs to be of the correct size and type. The battery won't fit into the fob if it is too big or too small. Batteries for key fobs are sold under a variety of names including CR2016 and CR2032. They cannot be interchanged. Consult your owner's guide or look for a sticker on the fob with the information. If you've found the right battery you can replace it within a matter of minutes. Most fobs feature a slider, gap, or switch that you can use to pry open the cover and swap the original battery for the new one. Make sure that the new battery has the same voltage and is inserted in the correct orientation. Water damage Water can be harmful to electronics even if they've survived the wash cycle or a dip. It can damage the chip and damage a battery. There are a few things you can do to limit the risk of damage. It's crucial to first eliminate the battery, and then dry the inside as possible. You can also make use of a cotton swab, that has been dipped in 90 percent isopropyl alcohol to clean the battery as well as the circuit board. After you've cleaned your key fob, you should wait several days for it to completely dry. You can speed this process up by placing it high on a shelf so that it isn't disturbed. Once you are sure that the battery is completely dry, replace it with another battery and use it as usual. If the key fob doesn't work, you may have a malfunctioning receiver module that isn't able to transmit signals to your car. It can be costly to repair, but it's well worth trying to avoid the expense of a replacement. The most straightforward way to fix a broken key fob is to change the battery. Change the battery will bring back the radio signal and make the key fob work once more. If the issue continues, you should seek assistance from a professional. A malfunctioning receiver module In some cases the key fob's reception module could be defective that hinders it from receiving and transmitting the correct signal. In this scenario the car will not recognize the remote control key. It will not unlock or start. In this scenario the replacement remote control will be required. Read the owner's manual before trying to modify the key fob by yourself. First, check that the key fob's battery is in good condition and that all buttons are functioning. It is also recommended to shut the doors and disconnect any aftermarket devices like radios or alarm systems from the vehicle. You can also try cleaning the chip using isopropyl alcohol, or an electronic cleaner. If the chip is fried it is likely to need to be replaced. After cleaning the key fob, take it off the circuit board. Then, clean the contacts with alcohol swabs, and let them dry. Once the contacts are dry you can reassemble them and test the key fob. If the key fob still isn't working, it might be required to replace the battery. Make sure you use the new battery with the same voltage as the old one. It's also a good idea to double-check that the battery is installed correctly, as the contact points can be very sensitive. Faulty keyless entry system It can be quite frustrating if the key fob stops working. The good news is that the majority of the time, it's easy to get it back in operation. The most frequent cause of a malfunctioning key fob is a dead battery for the coin which is easily replaced in a matter of minutes. Other reasons include signal interference or a defective module, as well as other electrical issues. The first step is to make sure that the battery is correctly inserted and has the right voltage. The correct battery type is also vital. The internal circuitry of the device could be damaged by using an unsuitable battery. the proper size or the correct polarized. Check the fuses for damage or if they have been melted. A transponder inside the key may be damaged or gone. This issue requires an investigation by a professional mechanic or a dealer for cars. Many dealerships and auto locksmiths can reprogram the car's key fob for a fee, but this can be costly. If you have an extra, it could be worthwhile to try reprogramming the fob yourself. You can usually find instructions in the owner's manual. If you don't have the manual you can look up instructions online or on YouTube. It is crucial to check the owner's guide before making any repairs on the key fob.