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How to Find a Fiat 500 Spare Key Fiat's iconic 500 has become something of an icon since its relaunch in 2007. Now the company has kicked off a new campaign to different powertrains with a mild-hybrid version. Replacing the battery for the key fob on a Fiat 500 is straightforward and cheap. It takes about 10 days for the key to be shipped from the Fiat main dealer. Diagnostics of a fault The key fob has an electronic chip that communicates with the Fiat immobiliser system. This ensures that only authorized cars are able to start the car. If the transponder chip inside your key fob is damaged, it won't be able to connect to the immobiliser unit and as a result, your car will refuse to start. The good thing is that it's possible to repair a damaged key fob, as long as the chip isn't physically damaged. A professional locksmith can assist in this regard, and will utilize the standard technology of dealers to repair it quickly and efficiently. Using an OBD scanner, it is possible to check if the fob is still communicating with the receiver module. This is a fast and simple procedure that will give you a first indication of the problem. If the OBD scanner reports that there is no communication between the receiver and transmitter modules, it might be required for the fob's transceiver module to be replaced. This is a costly solution and should be left to locksmiths. fiat replacement key fob for the key fob not working is a dead battery. It's simple fix that takes about 15 minutes. Ensure that the key fob can be visible to your vehicle. Then, try pressing the “Lock” or “Unlock” button to check if it responds. The key fob may not function at all, or maybe only intermittently, in the event that it is out of range. This could be a sign that the circuit board inside the key fob is damaged. You'll need to consult the owner's manual to find out on how to reprogram the key fob in this instance. The mechanical latch can be removed from the back of the key fob. (See the image below). Then, gently pry the edge of the battery holder away from the switch to take out the old battery. Then, you can insert a brand new #3 volt battery into the fob with the “+” side facing the rear cover of the key fob, and the “side facing down towards the key fob with the ” side facing down toward the buttons made of rubber. Water Damage The key fob may have rubber seals that keep water out of the chip, it's not waterproof. A splash of rain or a wash cycle is likely to be acceptable but submerging the key fob in pool or ocean water is likely to cause damage. The key fob will need to be reprogrammed if the device is exposed to water. You can follow the directions in your owner’s manual, or bring it to an experienced locksmith or Fiat dealer. A fob that's out of range may stop working. Key fobs usually have a range of around 30 feet, and if they're too far away from the car, they won't recognize them. To begin with, try moving closer to your vehicle. If you're not able to get it working, the key fob battery may need to be replaced. You can find replacement battery instructions for most automobiles on YouTube or in the owner's manual. This is a good time to think about purchasing a replacement key fob if yours is beginning to look shabby and damaged. Faulty Receiver Module In more modern models of Fiat cars it is not necessary to have an actual key to open or start the car. The cars have a remote control that transmits a wireless message to the car to turn the engine on and off. If you have a broken key fob, a locksmith is able to replace it for you. Leave this job to the professionals and save time and money. They can also create a new key for your Fiat. If you are looking for a replacement key for your Fiat car, you'll need to provide the locksmith information about the car over the phone. You'll need to provide the locksmith information about your car, like the year it was made and the model. This is crucial since the locksmith will require this information to ensure that the new key works with the locks in place. There are not many locksmiths who can make replacement keys for Fiat automobiles. You need to look for one with a solid reputation and experience in this particular field. You can rest assured that the key will work for your vehicle and you won't be wasting money. Unpaired Key The most common reason for a key fob not functioning is a dead coin-cell battery. The key fob has clips of metal that keep the button cell in place and complete the circuit so when these are worn or loosened, it can cause contact problems and the loss of power. Replace the battery with a new one with the same size, voltage, and specifications, or get a spare. It is essential to dry out the key fob in case it has been submerged in liquid. This can be done with isopropyl or an electronic cleaner. It is also recommended that you remove the battery, clean the circuit board and replace it before replacing. Contacting locksmiths is the best option if you are unable to locate an extra. A locksmith with the ability to reprogram Fiat transponder keys can do it without needing to look at the original keys. This is a much faster and less expensive solution instead of waiting for an original Fiat key from Italy to arrive. A professional locksmith will have the tools and equipment necessary to complete a replacement in as little time as possible.