How to Find a Fiat 500 Spare Key
Fiat's 500 is something of an iconic car since its relaunch in 2007. The company has now kicked off a larger campaign towards different powertrains by launching a mild-hybrid version.
Replacing the key fob battery on the Fiat 500 is straightforward and cost-effective. It takes around 10 days for the key to be delivered from the Fiat main dealer.
Diagnostics of a fault
The key fob is equipped with an electronic chip which communicates with the Fiat immobiliser system. This ensures that only authorized cars are able to start the car. If the transponder contained in the key fob is damaged, it will not be able to connect to the immobiliser, which means your vehicle will not start.
The good part is that it's attainable to repair a broken key fob, provided the chip is not physically damaged. A professional locksmith can assist with this issue, and they'll employ the latest technology from dealers to repair it quickly and efficiently.
Using an OBD scanner, it's possible to check if the fob is still communicating with the receiver module. It's a simple process, and it can provide initial indications of the root cause. If the OBD scanner indicates that there is no communication between the transmitter and receiver modules, it may be necessary for the fob's transmitter module to be replaced. This is a costly solution and should be left to locksmiths.
Dead Coin Battery
The most frequent reason for an unresponsive key fob is a dead battery. Fortunately, this is an easy fix that only takes only a few minutes. Make sure the key fob is visible to your vehicle. Press the "Lock" and "Unlock" buttons to see if they respond.
The key fob might not function at all, or maybe only intermittently, if out of range. This could be a sign of a damaged circuit board. You'll need to refer to the owner's manual to find out on how you can reprogram the keyfob in this situation.
You can change the battery by pulling off the mechanical latch that is on the back of the fob (see the image below). Then, gently pry the edge of the battery holder away from the switch to remove the old battery. Then, put a new #3 volt battery into the fob assembly, with the "+" side facing the rear cover of the key fob and the "--" side facing downwards toward the rubber buttons.
Water Damage
The key fob is not waterproof even though it's got rubber seals to prevent water from entering the electronic chip. A splash of rain or washing cycle is likely to be fine but submerging it fob in ocean or pool water is likely to cause damage.

The key fob will need to be reprogrammed if it is exposed to water. You can follow the steps in your owner’s manual, or visit an experienced locksmith or Fiat dealer.
A fob that's out of range could stop working. Key fobs typically have a range of 30 feet and if they're far from the car, it won't recognize them. In the beginning, try getting closer to your vehicle. If it doesn't work, the key fob's battery may need to be replaced. You can find information on how to replace the battery on most automobiles on YouTube or by consulting the owner's manual. If your key fob looks scuffed and dented, it's time to replace it.
Faulty Receiver Module
In more modern models of Fiat cars, you do not need an actual key to open or start the car. These cars use a key fob that sends an electronic signal to the car to turn on and off the engine. Locksmiths can fix the broken key fob. Leave this job to the professionals and save time and money. They can also program the new key for your Fiat.
You'll have to give the locksmith some details over the phone if you want to purchase a spare Fiat key. You'll need to provide the locksmith information about your car, including the year it was made and the model. This is important because the locksmith will require this information to ensure that the new key will work with the locks in place.
Not all locksmiths are able to make replacement keys for Fiat cars. Choose a locksmith who has an established track record and experience in the field. You can be assured that the key will work with your car and you won't lose money.
Keys that are unpaired
The most common reason for a key fob not working is a dead coin battery. The key fob has metal retaining clips that hold the button cell in place and complete the circuit, so when these are worn or loosened, it can result in contact issues and the loss of power. Replace the battery with one with the same voltage, size and specification, or use a spare.
If fiat punto keys was submerged in water, it is vital to dry it before inserting it again. Using isopropyl alcohol or electronic cleaner is a great way to do this. It is also recommended to remove the battery and clean the circuit board before replacing it.
Contacting locksmiths is the best solution if you're unable to find an alternative. A qualified locksmith can reprogram the Fiat transponder key, without needing to view your original keys. This is a faster and less expensive option than waiting for a genuine Fiat key from Italy to arrive. A professional locksmith is equipped with all the tools and equipment needed to replace your keys as quickly as they can.