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Reasons Your Fiat 500 Key Fob Won't WorkA key fob from Fiat 500 is a convenient method to unlock the doors and get started the car. There are a myriad of reasons why the fob won't be functioning. This includes a dead coin-battery or water damage, issues with the receiver module, and interference.This listing is for an NEW replacement Fiat Flip Key Remote - similar to the Ilco brand that must be professionally programmed by a local automotive locksmith (click here for Locksmith Search). This remote includes trunk, lock and unlock buttons.Dead Coin BatteryThe most common reason your 500 key fob will not function is a dead battery. Modern key fobs only have a limited range of operation and must be within a few inches of your vehicle to function. If you are further away 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 coin cell battery (Part number CR2032) by a new one from a reliable brand like Panasonic, Duracell, or Energizer. They are usually available at your local hardware store or on the internet.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 parking lights should light up and the key fob will operate the lock and unlock switch.If your fob's key isn't working after replacing the battery, there could be water damage that is preventing it from communicating with the module in your vehicle. Water damage can happen through a variety of methods, including simply splashing or submerging the key fob saltwater at the beach. If you suspect your fob was exposed to water, put it in a dry rice bag to draw the moisture out. If this isn't working, you'll require your fob to be reprogrammed either by an auto locksmith or a dealer.Water DamageWhile the fob has some rubber seals that keep water out of 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 end up dying. It's not the best idea to soak the fob in water, but don't give it up if you accidentally drop it in water, or fail to remove it from your pocket.First, remove the battery. Clean the electronic chip with isopropyl or a similar product and then dry it completely before replacing the battery. Check the fob again to verify if it's working. If the key does not work, it may need to be programmed again. This is usually handled by an auto locksmith or dealer.If your key is old and not programmed for your vehicle, 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 the key to be cut to match your vehicle's ignition. The locksmith will also need to reprogram your fob in the car's system. This is a simple and cost-effective procedure which can be completed in the next day.Receiver Module IssuesOne of the simplest reasons your 500 key fob could stop working is that it's simply out of range. The remote has a range of 30 feet, which means if you are too far away from your vehicle it won't be able to respond to your commands. It can be solved by moving it closer to your vehicle until it begins responding.If you've replaced the battery on your coin (commonly called a "button" or "watch") and your fob still won't work it could be due to an internal circuit board issue. In most cases, reprogramming the fob can resolve the problem. You can find the steps for the majority of vehicles on YouTube or in the owner's guide.It is possible to replace the metal retaining clips that hold the coin battery in place. If they lose tension it can prevent the battery from being seated properly and cause your remote to malfunction.In rare instances it is possible that the fob will become disconnected from your vehicle because of software or hardware issues. This issue can be fixed by visiting your local dealer or auto-locksmith to reprogram your key fob. In some cases, the software may also require reinstallation in your body control modules.InterferenceInterference can also cause the key fob to be unable to receive or transmit the signal. This can happen when the key fob is in proximity to the radio transmitter (cell phones, radar detectors) or any other source of electromagnetic radiation. mouse click the following web page might 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 everything you can do at home to resolve it e.g. It could be a defective 500 receiver module after you've tried replacing the battery, reprogramming, and using a spare key fob. The receiver module is situated under the dash and is able to pick up the radio frequency signals from the key fob. It transforms the signals into electronic commands that are then read by the vehicle.Luckily, there is an easy method to reset all of the on-board systems in your 500 and include the key fob. 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 remove any remaining electrical charge, and then restart the computer in your car. This could help you get your key fob to work again. If the problem persists it is recommended that you consult an expert certified technician. They will be able to diagnose the exact cause of your problem.