Reasons Your Fiat 500 Key Fob Won't Work A key fob from Fiat 500 is a great way to open the doors and start the car. There are a myriad of reasons the fob won't work. It could be due to a dead battery or damaged receiver module, water damage problems, and interference. This listing is for a NEW replacement Fiat Flip Key Remote - like the Ilco brand that must be programmed professionally by a local automotive locksmith (click here for Locksmith Search). This remote includes lock, unlock and trunk buttons. Dead Coin Battery The most frequent reason why your 500 key fob will not function is the battery is dead. Modern key fobs offer limited operating range and must be within only a few inches from the vehicle to work. If you're not close to your vehicle and you press the key fob button the car won't be able to respond, and will display an "Key Fob Not Detected" message in the instrument cluster. If this happens If this happens, replace the battery in the coin-cell (Part Number CR2032) by a fresh one of a reputable brand such as Panasonic Duracell or Energizer. You can usually find them 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 your key fob still does not work after replacing the battery, it may be water damage that has prevented it from connecting to the module in your vehicle. Water damage can happen in a variety of ways, such as an easy splash or submerging your key fob in saltwater at the beach. If you think your fob was exposed to water, you can place it in a bag of rice to draw out the moisture. If that doesn't work your fob is likely to need to be reset by an experienced locksmith or dealer. Water Damage Water damage can occur when you submerge the fob in the ocean, or wash it in a washing machine. Saltwater can cause the circuit board to short and then fail. It's not a good thing to soak the fob in water, but don't give it up when you accidentally drop it in water or forget to remove it from your pocket. First remove the battery from the fob. Before replacing the battery clean the electronic chip using isopropyl, or a similar product. Next check the fob to verify if it is working. If the key doesn't work, it may need to be reprogrammed. This is usually done by an auto locksmith or dealer. If https://www.thekeylab.co.uk/fiat-car-keys/ is old and has not been programmed for your car, you will need to replace it completely. A professional locksmith for automotive can carry out this simple task. The locksmith needs to cut the key to match the ignition in your vehicle. They will also need to program the fob into the system of your car. This is a quick and inexpensive process which can be completed the same day. Receiver Module Issues The 500 key fob you have may not function because it's out of range. The remote has a maximum range of 30 feet, which means in the event that you are far from your car, it won't respond to your commands. You can solve this issue by moving the remote closer to your car until it responds. If you've replaced the coin battery (commonly known as"button" or "button" or "watch") and your fob doesn't function, it could have an internal circuit board problem. In most cases, reprogramming the fob can resolve the issue. You can find the procedure for the majority of vehicles on YouTube or in the owner's guide. It is possible to replace the metal clips that keep the battery of your coin in place. If they loose tension it could hinder the coin battery from being properly seated and cause the remote to malfunction. In rare cases the fob can become out of the vehicle's sync because due to hardware or software issues. This could cause a significant problem, but you can usually resolve this issue by visiting an auto locksmith to reprogram your fob for you. In some instances the software might require reinstallation in your body control modules. Interference Interference can also cause the key fob to not be able to receive or transmit the signal. This could occur if the key fob is in close proximity to a radio transmitter like a cellphone or radar detector. Other reasons why the key fob might not function include a weak connection to the buttons or the internal chip, or water damage. If the key fob has stopped working one day suddenly and you've tried everything you can do at home to solve it e.g. You could have a malfunctioning 500 receiver module If you've tried replacing it with a battery, reprogramming it, or using an alternative 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 converts the signals into electronic commands, which are then read by the vehicle. Luckily, there is 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 approximately 15 minutes by disconnecting the negative cable first then the positive cable. Then, reconnect the battery. This will erase any remaining electricity, and restart the computer of your car. This can help get your key fob to function again. If the issue persists, you should speak with an expert technician. They will be able to identify the exact cause of issues.