Fiat 500 Key Fob Replacement If your 500 key fob stops working Try a different one to see if the car will recognize it. If it does, the issue may be related to the battery or water damage on the original fob. Replace the battery first. The "+" side should be facing down. Dead Battery The majority of the time, when a fob's not working, it's just because the battery is dead. It's easy to fix and the majority of fobs will give you a warning when the battery is depleted. You can find the instructions for most car fobs YouTube or in the owner's manual. You can also change it by taking it to a locksmith or dealer who has sold it to you. Sometimes a fob stops functioning due to a malfunction on the internal circuit board. It's not often, but it does happen. The internal chip can be damaged in the event that you drop the fob onto something that is hard. It could be a problem if you have an aftermarket fob, and the key doesn't work. In this case, you will need to visit an authorized locksmith or dealer and have it reconfigured to work with your 500. One 2012 FIAT 500 Flip Key Remote - Similar to Ilco brand with lock, unlock and trunk buttons. New replacement keyless entry remote (will require cutting and programmed by locksmith) Chips damaged A key fob with the fiat 500 number is an electronic device that transmits the signal to the car to start when you press the button. It is equipped with a microchip that contains information about the code needed to connect with your car. If the chip is damaged, it won't transmit the correct code, and the car won't begin. Locksmiths can repair the damage. United Locksmith is capable of providing this service for old models as well as the latest ones, so don't feel afraid to call them. Locksmiths can program an entirely new key fob. https://www.thekeylab.co.uk/fiat-car-keys/ 's less expensive to do this than going to the dealer, and it works just as well. You will need to provide certain information to the locksmith, such as the year your vehicle was manufactured and the model. If you're not sure how to fix this problem Try rub the chip with the help of a US dollar bill. The copper in the bill is abrasive, and will get rid of dirt and oxidation. However, it will not harm the microchip. If the chip is physically damaged however, it may not be able to be repaired. This can happen when you drop it or get it pushed over by your vehicle. Water Damage Water damage is likely to occur on your fob, whether you dropped it in the pool by accident or put them in a pocket while swimming, or splashed water on them in a rainy afternoon. Even if you only have a tiny amount of water on the key, it can cause major problems with its electronics and hinder it from working properly. The good news is that you can often solve this issue by taking off the key fob and using paper towels to rid it of any remaining water or dirt. Once the fob has dried and clean, you can replace its battery and it should begin working properly. You could also take your fob to a local locksmith or auto shop to get it professionally cleaned and programmed. These experts can make use of special equipment to make sure that the key fob is compatible with your car's computers. If your Fiat 500's key fob fails to function, it can be stressful and frustrating. It can be expensive and inconvenient to take your key fob to a dealer. A locksmith can replace your key fob with no need to visit an establishment. This is why they are a superior choice than an auto dealer. Pairing Issues If you lose your key fob, or it stops working but there is nothing the issue It could be due to the chip that has gone off the rails. It could be due to water damage or an unresponsive battery. Often times this can be done by following the instructions in your owner's manual. However it's best to have a locksmith from your automotive assist you if you're experiencing issues or the instructions in your manual don't work for you. This will ensure that the chip is not fried, and it's also the most economical alternative. A few hundred owners have reported that their keys will not lock their cars. This can be a problem when you need to refill at gas stations. Some owners have reported that their 500's locking system been damaged and they have had to replace the entire intermediate steering shaft. Fiat has actually mentioned this issue in an technical bulletin (TSB). If you're having trouble with your Fiat car, an experienced locksmith could help. They're able to duplicate your key or create a new one that will unlock and start your car. They can do this without seeing your old key and are usually less expensive than buying it from a dealer.