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Citroen C3 Key Fob Replacement If your C3 key fob suddenly stopped working it could be due to malfunctioning components. If the key fob works, it could be due to something else like water damage or a dead battery. The eC3 is targeting the mass market, and Citroen has focused on making service easier for customers. It comes with a variety of options, including remote diagnostics via virtual technology and a dedicated customer support app. Dead coin battery If the key fob's unlock function isn't functioning, there could be a problem with the coin battery. The battery should last between three and four years with regular usage, but it can die in a sudden manner. Fortunately, car manufacturers have built-in fail-safes so that you are able to unlock and start your car even if the key fob has a dead battery. The battery in a key fob is usually held in place by metal retaining clips that complete the circuit. The battery might not be powered if these clips are worn or dirty. The battery must also be the correct size and type. The battery will not fit into the fob if it's too large or too small. Key fob batteries are typically sold under different names, including CR2016 and CR2032 (though these are not interchangeable). Refer to the owner's manual for your model or look for a label on the fob with the details. Once you've got the right battery, it can be replaced in just a few moments. Most fobs feature a slider, switch, or gap that you can use to pop open the cover and swap the old one for an alternative. Make sure the new one has the same voltage and that it is placed in the correct way. Water damage Even the case that your key fob escaped the wash cycle or taking a dip in the pool, it isn't good for electronics. It can harm the chip and destroy a battery. There are a few steps you can do to prevent the damage. First, you must remove the battery and dry out the interior and circuit board as much 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 should let it dry for several days. You can speed up the process by placing it on a shelf where it won't be disturbed. When you're certain that it's bone dry, try replacing the battery and operating it as usual. If your key fob is not working it could be because the receiver module inside your car is malfunctioning and is not 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 easiest method to fix a faulty key fob is to replace the battery. The radio signal will be restored and your key fob will work once you replace the battery. If the issue persists then you should seek out professional assistance. A malfunctioning receiver module In some cases an issue with the receiver module of the key fob could prevent it from receiving or transmitting the proper signals. If this is the situation, your car will not recognize your remote control and will not unlock or start the engine. In this instance you'll need an alternative. Check out the owner's guide prior to attempting to reprogram the key fob on your own. First, make sure that the battery of the key fob is in good health and that all buttons are functioning. Close the doors and remove any devices that are not from the market, like alarms or radios out of the vehicle. You could also try cleaning the chip with isopropyl alcohol or electronic cleaner. If the chip is in a state of disintegration it will likely need to be replaced. After cleaning the key fob, you can remove the circuit board. Then, use alcohol swabs to clean the contacts and let them air dry. Once the contacts are dry, you can reassemble the key fob and test it. If best site fob isn't working, it might be necessary to replace the battery. Choose a replacement battery that has the same voltage level that the original battery. It's recommended to ensure that the battery is installed correctly and that the contact points can be very sensitive. Keyless entry system malfunctions It can be a hassle if the key fob stops functioning. It's not difficult to get your key fob running. A dead battery in the coin slot is the most frequent cause of a malfunctioning fob. It can be replaced in a matter of minutes. Other causes are signal interference, an ineffective receiver module or other electrical issues. The first thing to do is to ensure that the battery is of the correct voltage and has been correctly placed. The correct battery type is also crucial. Using a wrongly sized, or polarized one could cause damage to the internal circuitry. Examine the fuses for damage or if they have burned. A transponder inside the key may be damaged or not functioning properly. This will require a an examination by a professional mechanic or car dealer. A lot of auto locksmiths and dealerships can reprogram the key fob of a car for a fee, but this can be expensive. It could be worthwhile to reprogram your spare fob, if you have one. You will usually find the instructions in the owner's manual. If you don't own the manual, you can find instructions online or on YouTube. Before you attempt to fix the key fob, it's essential to read the owner's manual.