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How to Find a Fiat 500 Spare Key Fiat's classic Fiat 500 has become a cult classic since its relaunched in 2007. The company is now planning an additional attack against different powertrains with the launch of a mild hybrid version. The replacement of the key fob batteries on the Fiat 500 are simple and inexpensive. It takes around 10 days for the key to be shipped from the Fiat main dealer. Troubleshooting The key fob has an electronic chip that communicates with the Fiat immobiliser system to ensure that only authorised vehicles can start the engine. If the transponder chip inside your key fob is damaged, it will not be able to connect to the immobiliser unit which means your car won't start. It is possible to repair the key fob that has been broken, as long as the chip is not physically harmed. Locksmiths who are professionals will use standard techniques used by dealers to repair the chip quickly. It's possible to use an OBD scanner to see if your fob is still communicating with the receiver module. This is a quick and easy process that can give you a first indication of the problem. If the OBD scanner shows that there is no communication between the transmitter and receiver modules, it could be necessary for the fob's transmitter module to be replaced. This can be a costly option, and should be left to an expert locksmith. Dead Coin Battery The most common cause of an unresponsive key fob is a dead battery. This is a simple fix that only takes about a couple of minutes. Make sure that the key fob can be recognized by your vehicle. Press the “Lock” and “Unlock” buttons to check if they respond. If the key fob is out of range, it might not be responsive at all, or only intermittently. This could be an indication of a defective circuit board. fiat doblo key programming 'll need to consult your owner's guide for instructions on how you can reprogram the keyfob in this situation. You can change the battery by removing the mechanical latch on the back of the fob (see the image below). Then, gently pry the edge of battery holder away from the switch in order to remove the old coin-cell battery. Then, insert a new 3 volt battery # CR2032 into the fob holder with the “+” side facing towards the rear cover of the key fob and the “—” side facing down towards the buttons made of rubber. Water Damage The key fob may have rubber seals that keep water out of the chip inside, it's not waterproof. The key fob is likely to be fine with water from a shower or water from a wash cycle however, submerging the device in ocean or pool waters is not recommended. The key fob will need to be reprogrammed when it is exposed to water. You can follow the directions in the owner's guideline, or take it to an experienced locksmith or Fiat dealer. A fob that is not in range may not function. Key fobs usually have a range of about 30 feet, and if they're too far away from your vehicle, it won't be able to recognize them. The first step is to get closer to your car. If you're not able to get it working, the key fob battery might need to be replaced. You can find battery replacement instructions for all vehicles on YouTube or in the owner's manual. This is a good time to think about buying a new key fob if the one you have is beginning to appear worn and dented. Faulty Receiver Module In the more modern versions of Fiat cars there is no need for a physical key to open the car or start it. The cars are equipped with keys that transmit an electronic signal to the car, allowing it to turn on and off the engine. Locksmiths can fix the broken keyfob. You can save yourself time and money by delegating this job to professionals. They can also program the new key for your Fiat. If you're getting an additional key for your Fiat vehicle, you'll have to provide the locksmith with information about your car on the phone. You'll need to provide the locksmith specific information about your car, including the year of its production and the model. This is important as locksmiths need it 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 should choose one with a great reputation and has experience in this field. This means you can be certain that the new key will work with your car and you won't waste money. Keys that are not paired If you have a keyfob that has isn't functioning, the most likely reason is a dead coin battery. The key fob has metal clips that keep the battery in place and completes the circuit. When these become worn or loose, it could cause contact problems and no power. Replace the battery with a new one of the same size, voltage and specification, or use a spare. If the key fob was submerged in water, it is crucial to dry it before inserting it again. The use of isopropyl alcohol or electronic cleaner is a good method to accomplish this. It is also advisable to remove the battery and clean the circuit board prior to replacing it. Contacting a locksmith is the best solution if you are unable to locate an extra. A professional locksmith can reprogram a Fiat transponder key without needing to see the original keys. This is a quicker and less expensive solution rather than waiting for the original Fiat key from Italy to arrive. A professional locksmith will also have the equipment and tools needed to complete the replacement as fast as is possible.