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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 vehicle. However, there are many reasons why the fob may stop working. It could be due to a dead battery damaged receiver module, water damage issues, and interfering. This listing is for a NEW replacement Fiat Flip Key Remote – an exact replica of the 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 A dead battery is probably the most common reason for your 500 key fob not working. Modern key fobs have limited operating range and must be within a few inches of your vehicle to work. If you're far from your vehicle, and you push the keyfob button it won't respond and display the message “Key Fob Not Detected”. If this happens, replace the battery of your coin cell (Part number CR2032) by a new one from a reputable brand like Panasonic, Duracell, or Energizer. They are available at the local hardware store or on the internet. After you've replaced the coin cell battery You can test it by standing near your Fiat 500 and pressing the buttons. The car will flash its parking lights and the key fob should be able to operate the lock and unlock buttons. If your key fob still doesn't work even after replacing the battery, it may be water damage which prevents it from connecting to the module in your vehicle. Water damage can happen in a number of ways, from an accidental splash to submerging your fob in salt water at the beach. If you suspect your fob was exposed to water, put it in a dry rice bag to pull the moisture out. If fiat punto keys The Key Lab fails, 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 chip's electronic circuit the device, submerging it into the ocean or washing it in a machine could cause water damage. Saltwater can cause the circuit board to short and eventually fail. It's not a good idea to submerge the fob in water, but don't give it up in the event that you accidentally drop it in water or fail to take it out of your pocket. Take the battery off first. Before replacing the battery, clean the electronic chip with isopropyl, or a similar product. Check the fob to see if it is functioning. If the fob doesn't work, it may have to be reprogrammed. This is usually done by a professional or dealer auto locksmith. If your key is old and has not been programmed for your car, you will need to replace it completely. This is a simple procedure that can be completed by a professional automotive locksmith. The locksmith will need to cut the key to match the ignition on your vehicle. The locksmith will also have to reprogram the fob into the car's system. This is a low-cost and quick procedure that can be completed within the same day. Receiver Module Issues One of the main reasons why your 500 key fob might stop working is because it's out of range. The remote has a maximum range of 30 feet. So when you're too far away from your vehicle it will not respond to your commands. You can easily solve this problem by moving the remote closer to your car until it responds. If your fob doesn't work after replacing the battery for the coin, also known as a “button”, “watch” or “button” or “button”, it may be due to a malfunction on the circuit board inside. In the majority of cases, reprogramming your fob will fix the problem. There are instructions on how to do this on the majority of vehicles by searching YouTube or reading the owner's manual. You may have to replace the metal retaining clips that keep the battery of your coin in place. If they loose tension, it can prevent your coin battery from being properly seated, causing your remote to malfunction. In rare cases the fob could be disconnected from your vehicle due to software issues or hardware issues. You can fix this issue by visiting your local auto-locksmith or dealer to reprogram your key fob. In certain instances they might need to install the software again in your body control module, too. Interference Interference can also cause the key fob to be unable to receive or transmit a signal. This can occur when the keyfob is in close proximity to a radio transmitter, like a cellphone or radar detector. The key fob could not work because of a weak connection to the buttons, water damage or damage to the internal chips. If the key fob has stopped working one day without notice or after trying every option at home to resolve it e.g. battery replacement, reprogramming and using the spare key fob, it could have a malfunctioning receiver module on your 500. The receiver module, which is located beneath the dashboard, receives radio frequency signals from your key fob. It converts the signals into electronic commands that are then translated by the vehicle. There's a simple method to reset the 500's internal system, including the keyfob. Disconnect the battery of 12 volts for about 15 minutes by removing the negative cable and then the positive cable. Reconnect the battery. This will remove any remaining electricity and restart the car's computers, which could help get your key fob working again. If the issue continues you should speak with an expert technician. They can identify the exact cause of any issues.