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Reasons Your Fiat 500 Key Fob Won't Work A Fiat 500 key fob makes it simple to open doors and start your vehicle. There are a myriad of reasons the fob may stop working. This could be due to a dead coin-battery water damage, issues with the receiver module, and interference. This listing is for a NEW replacement Fiat Flip Key Remote that is similar to the Ilco brand. It must be professionally programmed (click here to find local automotive locksmiths). It comes with lock, unlock and trunk buttons. Dead Coin Battery A dead battery is the most common cause of your 500 key fob being inoperative. Modern key fobs have a limited operating range, and should be within only a few feet from the vehicle in order to function. If you're far from your vehicle and you press the key fob button the car won't respond and will display a “Key Fob Not Detected” message in the instrument cluster. If this happens, replace the battery in the coin cell (Part number CR2032) with a new one from a reliable brand such as Panasonic, Duracell, or Energizer. They are typically available at your local hardware store, or online. After you've replaced the battery in the coin cell, you can test it by standing close to your Fiat 500 and pressing the buttons. The car will blink its parking lights and the key fob will operate the lock and unlock switches. If the key fob doesn't work after replacing the battery, it might have water damage that prevents it from communicating with the receiver module inside your car. Water damage can happen in a variety of ways, ranging from a light splash to submerging your fob in salt water at the beach. If you suspect that your fob has been exposed to water, try placing it in a dry rice bag to pull the moisture out. If that doesn't work, the fob might need to be reset by an experienced auto locksmith or by the dealer. locked keys in car boot fiat punto Although the fob is equipped with rubber seals that keep water from the electronic chip inside the device, submerging it into the ocean or washing it in a machine can cause water damage. Saltwater can be particularly harmful to the fob's circuit board that can cause it to short out and eventually end up dying. It's not good to submerge the fob in water however, don't give it up even if you accidentally drop the fob in water or forget to take it out of your pants pocket. Remove the battery first. Before replacing the battery, clean the electronic chip using isopropyl or another similar product. Test the fob next to check if it's functioning. If the key does not function, it may need to be reset. This is usually handled by a dealer or professional auto locksmith. If the key is newer and was not programmed to your car it is likely to need to be replaced completely. A professional locksmith for automotive will be able to complete this process. The locksmith will require the key to be cut to match your car's ignition. They'll also need to reprogram the fob for the car's system. It's a simple and cost-effective process that can be completed the same day. Receiver Module Issues Your 500 key fob might not work because it's out of range. The remote has a maximum range of 30 feet. So when you're too far away from your vehicle it won't respond to your commands. This can be easily fixed by moving it closer to your vehicle until it begins responding. If you've replaced your coin battery (commonly known as”button” or “button” or “watch”) and the fob won't work It could be because of an internal circuit board problem. In most cases, reprogramming the fob will resolve this problem. The instructions are available for the majority of vehicles on YouTube or in the owner's guide. It's possible that you need to replace the metal retaining clips that hold the coin battery. If they loose tension, it can prevent the coin battery from sitting properly and result in the malfunction of your remote. In rare instances, the fob can become out of the vehicle's sync because of hardware or software issues. This can be a major issue, but you are able to frequently fix this issue by visiting an auto locksmith to have them reprogram your fob for you. In some cases they might need to reinstall the program in your body control module as well. Interference Interference can also cause the key fob not to receive or transmit an signal. This is possible when the key fob is located near an electronic radio transmitter (cell phones or radar detectors) or another source of electromagnetic radiation. Other reasons the key fob could not function may be a lack of connection to the buttons or damage to the internal chip or water damage. If your key fob suddenly stopped working, or you've tried everything at home to resolve it (e.g. You may have a faulty 500 receiver module If you've tried replacing it with a battery, reprogramming, or using an alternative key fob. The receiver module is situated under the dash and is able to pick up the radio frequency signals from the key fob. It converts them to electronic commands that the vehicle interprets. Luckily, there is an easy method to reset all of the on-board systems in your 500 device, including the key fob. Disconnect the battery for 15 minutes, removing first the negative cable and then the positive cable. Then, reconnect the battery. This will remove any residual electricity and restart the car's computer system, which can help get your key fob working again. If the issue persists you should seek out a certified technician. They'll be able to determine the exact cause of your issues.