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Reasons Your Fiat 500 Key Fob Won't Work A key fob for Fiat 500 allows you to easily open doors and start your vehicle. There are many reasons the fob may stop working. This could be due to a dead battery, water damage, problems with the receiver modules, and interference. This listing is for a NEW replacement Fiat Flip Key Remote – an exact replica of the Ilco brand that must be programmed professionally by a local automotive locksmith (click here for Locksmith Search). It includes lock, unlock, and trunk buttons. Dead Coin Battery The most common reason the 500 key fob won't function is due to the battery is dead. Modern key fobs operate with a limited operating range and must be within a few feet of the car to operate. If you're far away 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, replace the battery in the coin cell (Part number CR2032) with a new one from a reputable brand like Panasonic, Duracell, or Energizer. They are usually available at your local hardware store or online. After you've changed the battery on the coin cell you can test it by standing next to your Fiat 500 and pressing the buttons. The car should blink its parking lights and the key fob should operate the lock and unlock buttons. If the key fob doesn't work after replacing the battery, it could have water damage that stops it from connecting to the receiver module in your vehicle. Water damage can occur in many ways, including a simple splash or submerging the key fob in saltwater 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 isn't working, you'll have to get your fob changed by an auto locksmith or a dealer. Water Damage The fob does have rubber seals that keep water from the electronic chip inside it, submerging it in the ocean or washing it in a machine can cause water damage. Saltwater is particularly dangerous to the fob's circuit board and can cause it to short out and eventually die. If fiat ducato key replacement get the fob wet, it's not an ideal choice however, if you drop it in the water in a cup or fail to take it out of your pants pocket before running the washer do not give up hope. First take the battery off the fob. Clean the electronic chip with isopropyl alcohol or a similar product and then dry it thoroughly before replacing the battery. Test the fob next to determine if it's working. If the key doesn't work, it might need to be reprogrammed. This is usually handled by a professional or dealer auto locksmith. If your key is older and not programmed for your car You will need to replace it completely. A professional automotive locksmith will be able to complete this process. The locksmith needs to cut the key to match the ignition of your car. The locksmith will also have to reprogram your fob into the car's system. This is a fast and affordable process that is usually completed on the same day. Receiver Module Issues The 500 key fob could stop working because it is out of range. The remote's range is of 30 feet, so if you are too far from your vehicle, it won't respond to your commands. This can easily be resolved by moving it closer to your vehicle until it starts responding. If you've replaced the battery in your coin (commonly called a “button” or “watch”) and your fob still won't work, it could have an internal circuit board problem. Reprogramming the fob is usually the solution to this problem. You can find the procedure for the majority of vehicles on YouTube or in the owner's guide. You may have to replace the metal retaining clips that hold the battery of your coin in place. If they loose tension it could hinder the coin battery from being properly seated and can cause your remote to malfunction. In rare instances, the fob might be out of alignment with your vehicle because of hardware or software problems. This can be a major problem, but you can frequently fix this issue by visiting a local dealer or auto locksmith to have them reprogram your fob. In some cases it is possible that the software will require reinstallation into your body control modules. Interference In addition to a dead battery on a coin The key fob might not be receiving or transmitting signals due to interference. This could happen when the key fob is in close proximity to a radio transmitter, like a cell phone or radar detector. Other reasons why the key fob may not function could be due to a weak connection to the buttons and internal chip or water damage. If the key fob been unable to function for a while in the middle of the night and you've tried everything you can at home to solve it e.g. You may have a faulty 500 receiver module if you've tried replacing the battery, reprogramming or using a spare key fob. The receiver module, located under the dashboard, detects radio frequency signals from your key fob. It converts the signals into electronic commands which are then interpreted by the vehicle. There is a simple way to reset the 500's internal system including the keyfob. Disconnect the battery 12 volt for about 15 minutes by disconnecting the negative cable first then the positive cable. Then reconnect the battery. This will erase any remaining electrical charge, and then restart the computer of your car. This could help you get your key fob working again. If the issue continues it is recommended that you consult an expert technician. They will be able to identify the exact cause of problems.