Looking For Inspiration? Check Out Fiat Doblo Key Fob Replacement
How to Repair Fiat 500 Keys
There are many reasons why your Fiat 500 key FOB may cease to function. The tiny "watch" inside the key FOB is often dead. It's a 3.3-volt lithium CR2032 and you can purchase it anywhere for less than $3.

When you need a new key for an older Fiat model, a locksmith is the right person to contact. United Locksmith offers this service and offers all the parts and tools needed.
Keys
Fiat keys may appear to be simple but inside is a chip that is communicating with the immobiliser system in your car. If this chip is not in place or programmed to the immobiliser system in a correct manner then your vehicle will not start. Luckily, Car Keys Solutions are able to provide standard dealer technology and equipment that will ensure your Fiat key can be repaired, even in the event that it has suffered damage or has been lost.
The possession of a spare key is the most efficient way to keep your car running in the event of an emergency or being locked out. We can supply you with a standard key or remote fob. We use only the highest-quality blanks that are available and offer rapid turnaround time to ensure you are back on the road as quickly as possible.
Some customers prefer to visit a Fiat Dealership in order to obtain a new key. We can offer an easier and less expensive service. You will also save on the towing costs of getting your vehicle to and from the dealership because we can deliver the key to you. This can also decrease the time it takes to wait which can be anywhere from 5 to 10 days.
Remotes
The remote controls of Fiat vehicles are similar to keys, but they feature an IR LED (infrared). The LED sends a digital signal to the device, which opens or starts the vehicle when it is pressed. The microprocessor in the key transforms the signal into a number that is then sent to device.
This process is called "keyless entry". The more recent your vehicle is and the more likely it is to have a keyless entry system. The more modern your vehicle equipped with, the more features it will probably have with it. This includes locking and unlocking your car with just pressing a button, opening the doors without touching the handle, and much more.
The key fob has an integrated circuit chip that communicates with the vehicle's immobiliser system. The system determines whether the key is working by checking a certain sequence in the transponder. The vehicle won't start in the event that the chip is not present or in the event that it is not programmed to the right immobiliser system.
If the key fob is damaged, a locksmith may make a replacement. They'll also need to program the replacement key to connect with the car's immobiliser system. It is important to provide your locksmith with information regarding your vehicle when they call.
Keyless Entry
With a keyless entry on your Fiat 500 you can lock or unlock the car at the touch of the button. This is a growing feature in all kinds of vehicles, and adds security and convenience to the operation of your car.
If your remote keyless entry system ceases to function Check to see whether the battery in the fob has died. If the battery is empty replace it with a new one that has the same voltage, size, and type as the original. It is also important to ensure that the battery's contacts are free of corrosion or dust.
The rubber seals on the key fob shield the chip from water. However, prolonged exposure to salty or soapy water may cause the chip to fail. If your key fob is exposed to water, you must remove the battery and let it dry completely before putting it back in. You can also clean the electronic chip with isopropyl alcohol or electronic cleaner.
Keyless entry systems are more secure than the traditional systems because it rolls up the code used to unlock your vehicle after every use. This means that hackers will not be able gain permanent access to the vehicle even in the event that they intercept the signal.
Transponders
Fiat uses a crypto key transponder system which means the keys/transponders must be precoded with a secret code that is generated by the Body Control Module (BCM) before being "programmed" into the BCM. This is the reason why an unwritten key is not able to be programmed because the BCM has to read & write it's secret key to the transponder and then lock it. This is known as"cloning.
These are new replacement outer case OE SIP22 transponder keys for your fiat 500. replacement fiat 500 key come with a chip that unlocks the doors and opens the car. Locksmiths will need to cut them to fit in your ignition.