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Citroen C3 Key Fob Replacement If the key fob on your C3 stopped completely it could be due to a defective receiver module. If the key fob remains functional, the issue may be caused by something else, like water damage or a dead battery for the coin. The eC3 is aiming at the mass market and hence Citroen has focused on making service simple for customers. It has a range of features including virtual remote diagnosis and a dedicated app for customer service. Dead coin battery If the unlock button on the key fob isn't working, or if the unlock button does not work, it may be that the battery in the coin is not working properly. Battery life should be between three and four years with regular usage. However, it is possible for it to suddenly stop working. The car manufacturers have developed fail-safes that permit you to unlock and start the vehicle even if the key fob is dead. The battery inside the key fob is typically held in place by metallic retaining clips that complete the circuit. The battery may not be powered if the clips are worn or dirty. The battery must be the right size and type. The battery won't fit in the fob if it's too large or too small. Key fob batteries are sold under various names such as CR2016, and even CR2032. These batteries are not interchangeable. Consult your owner's guide or look for a label on the fob that has the details. Once you have the right battery, you can replace it in just a few minutes. Most fobs have the option of a slider, switch, or a gap that can be used to open the cover open and replace the old battery. Make sure the new one is the same voltage and that it is placed in the correct way. Water damage Even even if your key-fob has survived the wash cycle or a dip in the pool, it isn't good for electronics. It can damage the battery and cause severe damage to the electronic chip inside. Fortunately, there are citroen ds3 key to minimize the damage. It's important to first remove the battery, and then dry out the interior as much as you can. You can also make use of a cotton swab, that has been dipped in 90 percent isopropyl alcohol to clean the battery and circuit board. After you have cleaned the key fob, you should let it dry for several days. You can speed up the process by placing it on a high shelf where it will not be disturbed. After you've confirmed that it's dry, try putting in a brand new battery and use it as usual. If your key fob still not working it could be because the receiver module inside your car is malfunctioning and cannot transmit signals. This could be expensive to fix, but it's definitely worth trying to avoid having to buy a new one. The most straightforward way to fix a broken key fob is to replace the battery. The radio signal will be restored and your key fob should work once you replace the battery. If the issue persists you should seek professional assistance. Receiver module that is defective In some instances, the key fob's receiver module may be affected by a fault that stops it from receiving and transmitting the proper signal. In this instance, the car will not recognize the remote control key. It will not unlock or start. In this scenario you'll have to purchase another replacement. Read the owner's manual before trying to reprogram the key fob yourself. First, ensure that the key fob's battery is in good condition and that all buttons are working. Close the doors and take out any devices that are not from the market, like radios or alarms from the vehicle. You may also try cleaning the chip using isopropyl alcohol or electronic cleaner. If the chip has been damaged, you'll need to replace it. After cleaning the key fobs, remove the circuit board. Clean the contacts using alcohol swabs. Let them dry. When the contacts are dry, you can reassemble the key fob and test it. If the key fob doesn't work, then it might be required to replace the battery. Be sure to choose a new battery that provides the same voltage as your old one. Make sure to check the battery's position, as the contact points are very sensitive. Keyless entry system that isn't working properly It can be frustrating when the key fob stops working. It's not difficult to get your key fob back running. The most typical cause of a malfunctioning key fob is a dead battery for the coin that is easily replaced in a matter of minutes. Other reasons include signal interference or a damaged module, and other electrical issues. The first thing to do is to make sure that the battery is running at the correct voltage and that it is properly inserted. The correct type of battery is also important. The internal circuitry of the device can be damaged by using the wrong battery, or one that isn't the right size or is not polarized. You can also check the fuses to make sure they are not blown or have not been melted. Another possible problem is that the transponder in the key might have been damaged or gone missing. This is a problem that will require further diagnostics by a car dealer or professional mechanic. Auto locksmiths and dealers can reprogram the key fob on an automobile for a cost. However it can be expensive. If you have a spare, it could be worth trying to reprogram the fob yourself. In most cases, you can find the instructions in the owner's manual. If you do not have the manual, you can find instructions online or on YouTube. It is important to consult the owner's manual prior to making any repairs on the key fob.