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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. The company is now kicking off a new campaign to different powertrains by launching a mild-hybrid version. Replacing the battery for the key fob on a Fiat 500 is straightforward and inexpensive. It takes about 10 days for the key to be handed over from the Fiat main dealer. Diagnosis of a Fault The key fob houses an electronic chip that communicates with the Fiat immobiliser system to ensure that only authorized cars are able to start the engine. If The Keylab inside the key fob is damaged the chip will not be connected to the immobiliser. This means that your car will not start. It is possible to repair the key fob that has been damaged, as long that the chip isn't physically damaged. Locksmiths who are professionals will use standard techniques used by dealers to repair it quickly. With an OBD scanner, it's possible to determine if the fob is still communicating with the receiver module. It's a quick and simple process that can provide a first indication of the problem. If the OBD scan tool reports that communication between the receiver and transmitter modules is not happening it is possible to replace the transmitter module of the fob. This can be a costly alternative, and is best left to an expert locksmith. Dead Coin Battery The most common cause of a key fob that isn't working is a dead battery. This is an easy fix that only takes a few minutes. Ensure that the key fob is seen by your vehicle. Press the “Lock” and “Unlock” buttons to determine whether they respond. The key fob could not work in any way, or just occasionally, if it's out of range. This could be a sign that the circuit board in the key fob has gone bad. You'll have to refer to the owner's guide to get instructions on how to reprogram the keyfob for this scenario. 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 coin-cell battery. Install a brand new 3-volt #CR2032 battery into the fob with the “+ side” facing the rear cover and the “ side” looking down towards the rubber buttons. Water Damage The key fob isn't waterproof even though it is fitted with rubber seals that stop water from getting into the electronic chip. The key fob will likely be able to handle water from a shower or water from a wash, however, submerging it in ocean or pool waters is not recommended. If the key fob is exposed to water and fails to function, it will need to be reset. Follow the steps in the owner's manual or go to an expert locksmith or Fiat dealer. A fob that is out of range could stop working. The range of a key fob is usually around 30 feet. If they are far away from the vehicle, it will not recognize the fob. Start by getting closer to your vehicle. If this doesn't work, you may require replacing the key fob. You can find information on how to replace the battery in all vehicles either on YouTube or by consulting the owner's manual. It is a good idea to think about getting a new key fob in case yours is beginning to appear worn and damaged. Faulty Receiver Module Modern models of Fiat do not require a physical key in order to start or open the car. The cars are equipped with a remote control which sends a wireless message to the car to turn the engine off and on. If you've lost your key fob, a locksmith will replace it for you. You can leave this task to the professionals and save time and money. They can also program the new key for your Fiat. You will need to provide the locksmith with some information over the phone when you want to purchase a spare Fiat key. For instance, you'll be required to mention the year of production of your car, along with the name of the model. This information is important because locksmiths require it to ensure that the new key works with the existing locks. Not all locksmiths can make replacement keys for Fiat automobiles. You must choose one that has a good reputation and has experience in this field. You can be sure that the key will work for your vehicle and you won't waste money. Keys that are unpaired The most frequent reason for a key fob that isn't working is a dead coin cell battery. The key fob is made of metal clips for retaining the button cell in place and complete the circuit, in the event that they wear out or loosened, it can lead to contact problems and no power. Replace the battery by purchasing a new one with the same voltage, size and specification, or a spare. It is important to dry out the key fob when it is submerged in liquid. This can be accomplished with isopropyl or an electronic cleaner. It is also recommended to remove the battery, clean the circuit board, and replace it prior to replacing. If you are unable to locate a spare key, your best bet is to call locksmith. A licensed locksmith can reprogram the Fiat transponder key, without needing to see the original keys. This is a far cheaper and faster solution than waiting for a genuine Fiat key to arrive from Italy. A professional locksmith will have all the tools and equipment needed to complete a replacement as fast as is possible.