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How to Find a Fiat 500 Spare Key Fiat's classic 500 has evolved into something of an iconic car since its relaunch in 2007. The company is now launching an aggressive campaign to other powertrains, including a hybrid version. Replacing the key fob battery on a Fiat 500 is straightforward and cheap. The Fiat main dealer will supply the key in approximately 10 days. Diagnostics of a fault The key fob has an electronic chip that communicates with Fiat's immobiliser system to ensure that only authorized vehicles can start the engine. If the transponder on the key fob is damaged the chip will not be capable of connecting to the immobiliser, which means that your car won't start. The good part is that it's attainable to fix a damaged key fob, provided the chip is not physically damaged. A professional locksmith can help in this regard, and will utilize the standard technology of dealers to repair it quickly and effectively. By using an OBD scanner, it is possible to determine if the fob is still communicating with the receiver module. This is a simple procedure and can provide first indications of the root cause. If the OBD scan tool indicates that communication between the receiver and transmitter modules isn't working, it may be necessary to replace the fob's transmitter module. This is an expensive option and should be left to a locksmith. Dead Coin Battery The most common reason for an unresponsive key fob is a dead battery. This is an easy fix that takes just a few minutes. Check that the key fob can be seen by your vehicle. Then, try pressing the “Lock” or “Unlock” button to determine if the key fob responds. If the key fob's signal is out of range, it might not respond at all or may only function intermittently. This could also be an indication that the circuit board in the key fob is damaged. In this scenario you'll need to check the owner's manual to find out instructions on how to reprogram the key fob. You can replace the battery by removing the mechanical latch on the back of the fob (see the image below). Then, gently remove the edges of the battery holder near the switch, and remove the old battery. Then, you can insert a brand new #3 volt battery into the fob with the “+” side facing towards the cover on the rear of the key fob with the “–” side facing down toward the rubber buttons. Water Damage The key fob may have rubber seals that keep water out of the electronic chip inside, it is not waterproof. The key fob will likely be able to handle the splash of rain or water from a wash cycle, but submerging it in ocean or pool waters is not recommended. If the key fob is exposed to water and ceases to function it must be reset. You can follow the instructions in the owner's guideline, or go to a professional locksmith or Fiat dealer. A fob that's out of range may not function. The range of the fob's range is typically about 30 feet. If they're too far away from your vehicle, it will not recognize the fob. Start by moving closer to your car. If this fails, you may need to replace your key fob. You can find information on how to replace the battery on most automobiles on YouTube or by reading the owner's guide. This is a great time to consider getting a replacement key fob if it is beginning to look shabby and dented. Faulty Receiver Module In the more modern versions of Fiat cars it is not necessary to have an actual key to open or start the car. These cars have the key fob which sends a wireless signal to the car to turn off and turn on the engine. A locksmith can repair the broken keyfob. Leave this job to the professionals and save time and money. They can also program a new key for your Fiat. When you are getting an additional key for your Fiat, you will need to provide the locksmith with some details about your car over the phone. For instance, you will need to provide the year of manufacture of your vehicle and the model's name. This is crucial because the locksmith will need this information to ensure that the new key will work with the existing locks. You should be aware that not all locksmiths are able create replacement keys for Fiat vehicles. Look for a locksmith with an excellent track record and expertise in the field. This means that you are certain that the key will work with your car and you won't be wasting money. Keys that are unpaired If you have a key fob that isn't working, the most frequent reason is a dead coin battery. The key fob is equipped with metal clips that keep the battery in place and are part of the circuit. When fiat keys become worn or loose, they can cause contact issues and lose power. Replace the battery with a new one of the same voltage, size and specification, or a spare. It is crucial to dry out the key fob when it was submerged in liquid. Using isopropyl or electronic cleaner is an effective method to accomplish this. It is also recommended to take out the battery and clean the circuit board and replace it before replacing. If you are unable to find a spare key your best bet is to contact locksmith. A qualified locksmith can reprogram a Fiat transponder keys without having to look up the original keys. This is a far cheaper and quicker solution than waiting for a genuine Fiat key to arrive from Italy. A professional locksmith will also have the tools and equipment needed to complete a replacement in as little time as possible.