Reasons Your Fiat 500 Key Fob Won't Work A key fob for the Fiat 500 allows you to easily open doors and start your car There are a myriad of reasons the key fob might stop working This could be due to a dead coin battery damaged receiver module, water damage issues, and interfering This listing is for a NEW replacement Fiat Flip Key Remote that is similar to the Ilco brand It needs to be professionally programmed click here to find local locksmiths for 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 that isn't working Modern key fobs have only a limited range of operation and must be within just a few inches of the vehicle in order to function If you are further away from your vehicle and you press the keyfob button it will not respond, and display the message "Key Fob Not Detected" If this happens, simply replace the battery of your coin cell Part number CR2032 with a brand new one from a trusted brand such as Panasonic, Duracell, or Energizer You can find them in your local hardware store or on the internet After you've replaced the coin cell battery You can test it by standing close to your Fiat 500 and pressing the buttons The car should blink its parking lights, and the key fob should be able to operate the lock and unlock switches If the fob's key doesn't work after replacing the battery, it might have water damage that prevents it from communicating with the receiver module inside your vehicle 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, try putting it in a dry rice bag to pull the moisture back out If this doesn't work your fob will probably need to be reset by a professional auto locksmith or dealer Water Damage Damage to the water supply can occur if you immerse the fob in the ocean or wash it in a machine Saltwater can cause the circuit board to short and eventually fail It's not the best idea to get the fob wet however, but don't give it up if you accidentally drop it in water or forget to remove it from your pants pocket First, remove the battery from the fob Before replacing the battery, clean the electronic chip with isopropyl or a similar product Next try the fob and test if it works If the fob doesn't work, it may need to be reset This is usually handled by a dealer or professional auto locksmith If your key is older and is not programmed for your car it is necessary to replace it completely This is a straightforward process that can be handled by a professional locksmith for automotive use The locksmith will need the key to be cut to match your car's ignition They'll also need to reprogram the fob for the system of your car This is a cheap and quick process that could be completed the same day Receiver Module Issues One of the most common reasons your 500 key fob might stop functioning is that it's out of range The remote usually has 30 feet of range or less, and if it's too far from your car, it will not respond to your commands This can be fixed by moving it closer to your vehicle until it starts responding If your fob won't work after you replace the coin battery, also called a "button", "watch" or "button" It may be due to a malfunction on the internal circuit board In the majority of cases, reprogramming your fob will solve the issue You can find the steps for most vehicles on YouTube or in the owner's manual You may have to replace the metal retaining clips that keep the coin battery in place If they lose tension, it can stop your coin battery from being properly seated, causing your remote to malfunction In rare instances, the fob could be out of alignment with your vehicle because of hardware or software issues This can be a major issue, but you are able to usually resolve this issue by visiting a local dealer or auto locksmith to reprogram your fob In some instances it may be necessary to reinstall the software on your body control module as well Interference Interference can also cause the key fob not to receive or transmit a signal This could occur if the key fob is located near an electronic radio transmitter cell phones and radar detectors or any other source of electromagnetic radiation The key fob could not work due to a bad connection with the buttons water damage or damage to the internal chips If the key fob has stopped working one day out of the blue or even after trying everything you can at home to resolve it eg replacing batteries, reprogramming or using the spare key fob, it could have a malfunctioning receiver module on your 500 The receiver module, located beneath the dashboard, detects 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 of the on-board systems in your 500 keys, including the key fob Disconnect the battery 12 volt for about 15 minutes, by taking off the negative cable first then the positive cable Then reconnect the battery This will clear any residual electrical charge, and then restart the car's computer This can help get your key fob to work again If https//wwwg28carkeyscouk/fiat-car-key-replacements-near-me/ persists, you should seek the advice of an expert technician They will be able to determine the exact cause of any problems