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Reasons Your Fiat 500 Key Fob Won't Work A fiat 500 key fob is a convenient method to unlock the doors and get started the car. There are a myriad of reasons the key fob might stop working. These include a dead coin battery, water damage, receiver module issues, or interference. This listing is for a NEW replacement Fiat Flip Key Remote that appears similar to the Ilco brand. It has to be professionally programmed (click here to find local locksmiths in the automotive industry). This remote includes lock, unlock and trunk buttons. Dead Coin Battery The most common reason your 500 key fob doesn't work is an inactive battery. Key fobs of today have a limited range of operation and must be within just a few inches of the vehicle in order to work. If you're far from your vehicle and press the keyfob button it will not respond, and display the message “Key Fob Not Detected”. If this happens, simply replace the battery on your coin cell (Part number CR2032) with a brand new one from a trusted brand such as Panasonic, Duracell, or Energizer. They can be found in your local hardware store, or on the internet. You can test the battery on your coin-cell by pressing the buttons while standing near your Fiat 500. The parking lights should light up and the key fob will operate the lock and unlock switches. If your key fob still does not work after replacing the battery, it could be water damage that hinders it from connecting to the module in your vehicle. Water damage can occur in a number of ways, ranging from a light splash to submerging your fob in salt water at the beach. If you suspect that your fob has been exposed to water, put it in a dry rice bag to draw the moisture out. If that doesn't work, your fob will probably need to be reprogrammed by an experienced auto locksmith or the dealer. Water Damage Water damage can happen if you submerge the fob in the ocean or wash it in a washer. Saltwater can cause the circuit board to short and eventually cease to function. In the event that you let your fob get wet, it's not an ideal idea but if you drop it into a glass of water or don't remember to remove it from your pants pocket prior to running the washing machine and you don't have a chance, don't give in. Take the battery off first. Before replacing www.thekeylab.co.uk clean the electronic chip with isopropyl or a similar product. Check the fob again to verify if it's functioning. If the key doesn't function then it might need to be changed. This is typically handled by a dealer or professional auto locksmith. If your key is old and is not programmed to work with your vehicle, you will need to replace it completely. A professional locksmith in the automotive industry can carry out this simple task. The locksmith will have to cut the key to match the ignition of your car. The locksmith will also have to reprogram your fob in the vehicle's system. It's a simple and affordable process that can usually be completed in the same day. Receiver Module Issues One of the main reasons why your 500 key fob may stop functioning is that it's out of range. The remote usually has 30 feet of range or less and if it's far from your car, it will not respond to your commands. You can solve this problem by moving the remote closer to your vehicle until it responds. If you've replaced your coin battery (commonly known as a “button” or “watch”) and the fob won't work It could be because of an internal circuit board issue. Reprogramming your fob can resolve 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 battery of your coin in place. If they loose tension, it can stop your coin battery from sitting properly, causing your remote to malfunction. In rare instances, the fob can become out of connection with your vehicle as a result of hardware or software problems. You can fix this issue by visiting your local dealer or auto-locksmith to reprogram your key fob. In some cases they might need to reinstall the software in your body control module, as well. Interference Interference can also cause the key fob not to receive or transmit signals. This could occur if the keyfob's location is in close proximity to a radio transmitter, like a cell phone or radar detector. Other reasons the key fob might not function include a poor connection to the buttons or damage to the internal chip or water damage. If the key fob failed to work one day without notice or after trying everything you can at home to fix it e.g. You may have a faulty 500 receiver module If you've tried replacing it with a battery, reprogramming, or using an alternative key fob. The receiver module is situated under the dash, and it picks up the radio frequency signals from the key fob. It converts them into electronic commands that the vehicle interprets. There's a simple method to reset the 500's internal system, including the keyfob. Disconnect the battery for 15 minutes by removing first the negative cable, then the positive cable. Then, reconnect the battery. This will clear any residual electric current, and also restart the computer of your car. This can help you get your key fob to work again. If the issue persists, you should seek out an expert technician. They'll be able determine the exact cause of your issue.