Reasons Your Fiat 500 Key Fob Won't Work A Fiat 500 key fob makes it simple to open doors and start your vehicle. However, there are numerous reasons the fob could stop functioning. This could be due to a dead coin-battery and water damage, as well as receiver modules issues, and interference. This listing is for an NEW replacement Fiat Flip Key Remote that is similar to the Ilco brand. It must be professionally programmed (click here to search for local locksmiths for automotive locksmiths). This remote includes lock, unlock and trunk buttons. Dead Coin Battery The most frequent reason why the 500 key fob won't function is the battery is dead. Modern key fobs have a limited operating range and should be within only a few feet from the car to operate. If you're far from your vehicle, and you press the key fob button, the car will not respond, and will display the "Key Fob Not Detected" message in the instrument cluster. If this happens then replace the battery for your coin-cell (Part Number CR2032) by a brand new one of a trusted brand such as Panasonic Duracell or Energizer. You can typically find them in your local hardware store or on the internet. You can test the battery of your coin-cell by pressing the buttons while you are standing close to your Fiat 500. The parking lights should flash and the key fob should operate the lock and unlock switch. If your key fob does not work after replacing the battery, it may be water damage which is preventing it from communicating with the module in your vehicle. Water damage can happen in many ways, such as the simple splash or submerging the key fob into saltwater at the beach. If you think your fob was exposed to water, place it in a rice bag to draw out the moisture. If this doesn't work your fob may require reprogramming by an experienced auto locksmith or the dealer. Water Damage Damage to the water supply can occur if you submerge the fob in the ocean, or wash it in a washing machine. Saltwater can cause the circuit board to short and then end up dying. It's not good to get the fob wet however, don't give it up if you accidentally drop it in water or forget to take it out of your pocket. First, remove the battery. Before replacing the battery, clean the electronic chip using isopropyl or another similar product. Test the fob next to check if it's working. If the fob doesn't function, it may need to be reset. This is usually handled by a dealer or professional auto locksmith. If your key is a bit older and is not programmed for your car then you'll need to replace it completely. A professional automotive locksmith can complete this simple process. The locksmith must cut the key to match the ignition of your vehicle. The locksmith will also have to reprogram the fob into the vehicle's system. This is an affordable and quick procedure that can be completed the same day. Receiver Module Issues One of the main reasons why your 500 key fob might stop functioning is because it's out of range. The remote's range is of 30 feet, which means if you are too far away from your vehicle it won't respond to your commands. You can remedy this by moving your remote closer to your vehicle until it responds. If your fob isn't working after you replace the battery for the coin, also called a "button", "watch" or "button", it could be a problem with the circuit board inside. Reprogramming the fob typically resolves this issue. You can find the procedure for most vehicles on YouTube or in the owner's guide. It is possible to replace the metal retaining clips that keep the coin battery in place. If https://www.thekeylab.co.uk/fiat-car-keys/ lose tension it could prevent the battery from sitting properly and cause your remote to malfunction. In rare cases the fob might become disconnected from your vehicle due to software or hardware issues. You can fix this issue by visiting your local dealer or auto-locksmith to reprogram your key fob. In some cases the software may require reinstallation into your body control modules. Interference Interference can also cause the key fob to be unable to receive or transmit signals. This can happen when the key fob is located near a radio transmitter (cell phones, radar detectors) or another source of electromagnetic radiation. Other reasons why the key fob could not function may be a lack of connection to the buttons or the internal chip, or water damage. If your key fob suddenly stopped working, or if you have tried everything at home to fix it (e.g. You might have a damaged 500 receiver module If you've tried replacing it with a battery, reprogramming, or using an alternative key fob. The receiver module is located under the dash and picks up the radio frequency signals from the key fob. Then, it converts them into electronic commands that the vehicle interprets. There is a simple way to reset the 500's on-board system, including the keyfob. Disconnect the battery of 12 volts for about 15 minutes, by taking off the negative cable first then the positive cable. Reconnect the battery. This will clear out any remaining electricity and then restart the car's computers, which can help get your key fob working again. If the issue persists, you should seek out an expert technician. They'll be able to identify the root cause of your problem.