Reasons Your Fiat 500 Key Fob Won't Work A key fob with the fiat 500 number is a convenient way to open the doors and begin the car There are many reasons the fob may stop working This includes a dead battery water damage, problems with receiver modules, as well as interference This listing is for an NEW replacement Fiat Flip Key Remote - like the Ilco brand that needs to be programmed professionally by a local locksmith click here to search for a Locksmith Search This remote includes trunk, lock and unlock buttons Dead Coin Battery The most frequent reason why your 500 key fob won't function is the battery is dead Modern key fobs have a limited operating range and should be within a few feet of the vehicle in order to function If you're far from your vehicle and hit the keyfob, it will not respond, and display the message "Key Fob Not Detected" If this occurs, replace the coin-cell battery Part Number CR2032 by a new one of a reputable brand like Panasonic Duracell or Energizer They are available at the local hardware store or on the internet After you've changed the battery on the coin cell You can test it by standing in front of 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 your key fob isn't working after replacing the battery, there may be water damage which hinders it from interacting with the module in your vehicle Water damage can occur in a variety of ways, such as the simple splash or submerging your key fob in saltwater at the beach If you suspect that your fob has been exposed to water, place it in a bag of rice to draw out the moisture If this isn't working, you'll need to have your fob reset by an auto locksmith or dealer Water Damage Although the fob is equipped with rubber seals to keep water from the chip's electronic circuit it, submerging it in the ocean or washing it in a machine can cause water damage Saltwater can cause the circuit board to short and then fail The fob getting wet is not an option but if you drop it into a glass of water or fail to take it out of your pants pocket before running the washing machine Don't give up hope Remove the battery first Clean the electronic chip with isopropyl alcohol or another similar product and dry it thoroughly before replacing the battery Test the fob next to check if it's working If the key isn't working, it may have to be reset This is usually done by a professional or dealer auto locksmith If your key is old and has not been programmed for your vehicle, you will need to replace it completely This is an easy process that can be handled by a professional automotive locksmith The locksmith will require the key to be cut to match the car's ignition They'll also have to reprogram the fob in the system of your car This is a simple and affordable process which can be completed the same day Receiver Module Issues One of the simplest reasons your 500 key fob could stop working is that it's simply out of range The remote usually has an operating range of 30 feet or less and if it's far from your vehicle, it won't respond to your commands It is possible to fix this by moving the remote closer to your car until it responds If you've replaced the battery in your coin commonly known as a "button" or "watch" and your fob still won't work It could be because of an internal circuit board problem In the majority of cases, reprogramming your fob will solve the problem You can find the instructions on how to do this for the majority of automobiles by searching YouTube or looking through the owner's manual It could be necessary to replace the metal clips that hold the coin batteries in the correct position If they loose tension, it can prevent the battery from being properly seated and could cause the remote to malfunction In rare cases it is possible that the fob will become desync'd with your vehicle because of software or hardware issues This could cause a significant issue, but you are able to usually resolve this issue by visiting a local dealer or auto locksmith to reprogram your fob for you In certain instances it is possible that the software will require reinstallation in your body control modules Interference In addition to a dead battery on a coin, the key fob may not be receiving or transmitting a signal due to interference This may happen if the keyfob's location is in close proximity to a radio transmitter like a cellphone or radar detector Other reasons why the key fob might not work include a weak connection to the buttons, damage to the internal chip or water damage If https//wwwthekeylabcouk/fiat-car-keys/ has been unable to function for a while in the middle of the night or even after trying everything you can do at home to fix it eg You might have a damaged 500 receiver module in the event that you've tried replacing the battery, reprogramming it, or using an alternative key fob The receiver module is located under the dash, and it picks up the radio frequency signals from the key fob It converts them to electronic commands that the vehicle interprets There is a straightforward method to reset the 500's in-board system, including the keyfob Disconnect the battery of 12 volts for about 15 minutes by removing the negative cable and then the positive cable Then reconnect the battery This will eliminate any remaining electricity, and restart the car's computer This could help you get your key fob to function again If the issue persists you should seek out an expert technician They will be able to determine the root of your problems