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Reasons Your Fiat 500 Key Fob Won't Work A Fiat 500 key fob allows you to easily open doors and start your vehicle. There are a myriad of reasons why the key fob might stop working. This could be due to a dead coin-battery or water damage, problems with receiver modules, as well as interference. This listing is for a NEW replacement Fiat Flip Key Remote – look-alike Ilco brand that needs to be professionally programmed by a local automotive locksmith (click here to search for a Locksmith Search). It comes with lock, unlock and trunk buttons. Dead Coin Battery The most common reason your 500 key fob won't function is an inactive battery. Modern key fobs have a very limited operating range, and must be within only a few feet from the vehicle to operate. If you're far from your vehicle and you press the keyfob button, it won't respond and display the message “Key Fob Not Detected”. If this occurs If this happens, replace the battery in the coin-cell (Part Number CR2032) by a fresh one of a reputable brand like Panasonic Duracell or Energizer. They are typically available at your local hardware store or online. After you've replaced the battery of your coin cell you can test it by standing near your Fiat 500 and pressing the buttons. The car will blink its parking lights, and the key fob will operate the lock and unlock buttons. If the fob's remote doesn't work after replacing the battery, it might have water damage that stops it from communicating with the receiver module in your car. Water damage can happen in a number of ways, from an accidental splash to submerging the fob salt water at the beach. If you suspect that your fob has been exposed to water, you can try placing it in a dry rice bag to draw the moisture out. If this does not work, you'll have to get your fob changed by an auto locksmith or a dealer. Water Damage Water damage can occur when you immerse the fob into the ocean, or wash it in a machine. Saltwater is particularly dangerous to the fob's circuit board which causes it to short out and eventually end up dying. If you get the fob wet, it's not a good idea however, if you drop it in an empty cup of water, or fail to take it out of your pants pocket prior to running the washing machine, don't give up hope. First take the battery off the fob. Clean the electronic chip using isopropyl alcohol or another similar product and dry it thoroughly before replacing the battery. Check the fob again to verify if it's functioning. If the key doesn't work, it might need to be reprogrammed. This is usually handled by a dealer or professional auto locksmith. If the key is newer and has never been programmed to your vehicle It will most likely need to be replaced completely. A professional locksmith for cars can carry out this simple task. The locksmith will have to cut the key to match the ignition of your vehicle. They'll also have to reprogram the fob to the system of your car. This is a quick and cost-effective procedure which can be completed in the same day. Receiver Module Issues The 500 key fob you have may be inoperable because it's out of range. The remote usually has 30 feet of range or less, and if it's too far from your vehicle, it will not respond to your commands. You can easily solve this problem by moving the remote closer to your vehicle until it responds. If your fob does not work after you replace the coin battery, also known as a “button”, “watch” or “button” or “button”, it could be a problem with the circuit board inside. Reprogramming the fob is usually the solution to the issue. You can find the instructions for most vehicles on YouTube or in the owner's manual. It's possible that you need to replace the metal clips that keep the coin battery in place. If they lose tension it can prevent your coin battery from being properly seated and cause your remote to malfunction. In rare instances, the fob may become desync'd with your vehicle due to software issues or hardware issues. www.thekeylab.co.uk could be a huge issue, but you are able to frequently fix this issue by visiting an auto locksmith to reprogram your fob for you. In certain situations they might need to install the software again in your body control module, too. Interference Interference can also cause the key fob to not receive or transmit signals. This could happen when the keyfob's location is in close proximity to a radio transmitter such as a cell phone or radar detector. The key fob might not function because of a problem with the buttons water damage or damage to the internal chips. If the key fob has been unable to function for a while without notice or after trying everything you can do at home to solve it e.g. replacing the battery, reprogramming, and using the spare key fob, it could have a faulty receiver module on your 500. The receiver module, which is located under the dashboard, is able to pick up radio frequency signals from your key fob. It converts them into electronic commands that the vehicle interprets. Fortunately, there's an easy method of resetting all on-board systems in your 500, including the key fob. Disconnect the battery 12 volt for approximately 15 minutes by disconnecting the negative cable first then the positive cable. Then reconnect the battery. This will erase any remaining electric current, and also restart the car's computer. This can help you get your key fob to function again. If the issue continues it is recommended that you consult an experienced technician. They'll be able to determine the root of your problem.