How to Find a Fiat 500 Spare Key
Fiat's iconic 500 has become something of an iconic vehicle since its revival in 2007. The company has now launched an additional attack against different powertrains with the launch of a mild hybrid version.
Replacing the key fob's battery on a Fiat 500 is straightforward and inexpensive. It takes approximately 10 days for the key to be shipped from the Fiat main dealer.
Fault Diagnosis
The key fob is equipped with an electronic chip that communicates with your Fiat's immobiliser system to ensure that only authorized cars are able to 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 your vehicle will not start.
It is possible to repair a key fob that has been broken, as long as the chip isn't physically harmed. A professional locksmith will utilize the same technology used by dealers to repair it quickly.
Using an OBD scanner, it's possible to determine if your fob is still communicating with the receiver module. It's a quick and easy process that can give you a first indication of the issue. If the OBD scanner reports that there is no communication between the transmitter and receiver modules, it might be necessary for the fob's transmitting module to be replaced. This is a costly option, so it's best left to a professional locksmith.
G28 of a key fob not working is a dead battery. Fortunately, this is an easy fix that takes only a few minutes. First, ensure that the key fob is within range of your vehicle. Press the "Lock" and "Unlock" buttons to check whether they respond.
The key fob may not work at all, or perhaps only intermittently, if it is out of range. This could also be a sign that the circuit board in the key fob has failed. You'll need to refer to the owner's guide to get instructions 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 pull the edge of the battery holder away from the switch to release the old battery. Put a brand new #CR2032 3-volt battery into the fob with the "+ side" facing the cover on the rear and the " side" looking down towards the buttons made of rubber.
Water Damage

Although the key fob comes with rubber seals that keep water out of the chip, it's not waterproof. A splash of rain or washing cycle is likely to be okay however, submerging the key fob in pool or ocean water could cause damage to it.
If the key fob is exposed to water and stops working the device will need to be reset. Follow the steps in your owner’s manual, or visit an expert locksmith or Fiat dealer.
Another common reason a fob won't work is that it's not in the range of your car. The range of a key fob is usually around 30 feet. If they're too far from your vehicle, it will not recognize them. The first step is to move closer to your vehicle. If this fails, you may need to replace your key fob. You can find battery replacement instructions for the majority of vehicles on YouTube or in the owner's manual. If your key fob looks damaged and scratched, then it's time to replace it.
Faulty Receiver Module
Modern Fiat models do not require an actual key to start or open the car. The cars utilize a key fob that sends wireless signals to the car, allowing it to turn on and off the engine. Locksmiths can repair the broken keyfob. Don't worry about it to experts and save time and money. They can also program a new key for your Fiat.
You'll need to give the locksmith some details over the phone if you want a spare Fiat key. For instance, you will be required to give the year of production for your vehicle and the name of the model. This is vital as locksmiths require it to ensure that the new key works with the existing locks.
It is important to note that not all locksmiths can make replacement keys for Fiat vehicles. Choose a locksmith who has an excellent track record and experience in the field. You can be sure that the key will work on your car, and you won't waste money.
Unpaired Key
If you have a keyfob that has stopped functioning, the main reason is a dead coin battery. The key fob is made of metal clips for retaining the button cell in place and complete the circuit, so if they become worn or loose it can cause contact issues and no power. Replace the battery with the same one, but with a different design.
If the key fob was submerged in water, it is important to dry it out before inserting it back into the device. This can be accomplished with isopropyl or an electronic cleaner. It is also recommended to remove the battery and clean the circuit board, and replace it prior to replacing.
If you are unable to find a spare key, the best solution is to contact locksmith. A locksmith with the ability to reprogram Fiat transponder keys can do so without needing to look at the original keys. This is a cheaper and faster option than waiting for an authentic Fiat key to arrive from Italy. A professional locksmith will have all the equipment and tools needed to complete a replacement in as little time as is possible.