Fiat 500 Key Fob Replacement
If your 500 keyfob ceases working, use another one to see if it can be detected by the car. If it does, the issue may be related to the battery, or water damage on the original fob.
Replace the battery first. Make sure the new # CR2032 coin cell battery is properly inserted with the "+" side facing down on the fob.
Dead Battery
The battery is usually the cause of a fob not working. It's a simple fix Most fobs give you a warning if the battery is low. You can find the correct procedure for the majority of car fobs on YouTube or in the owner's guide. You can also replace it by taking it to an expert locksmith or the dealer who has sold it to you.
Sometimes, a fob may cease to function, and it could be an issue with the circuit board in the internal circuit. It's rare however it can occur. The internal chip may be damaged in the event that you drop the fob on something that is hard. This is also the case if you use an aftermarket key and the fob does not work. In this case you'll need to go to an expert locksmith or dealer and have it reprogrammed to work with your 500.
One 2012 FIAT FIAT 500 flip key remote - resembles Ilco with locks, unlocks, and trunk buttons – new replacement keyless entry (will require cutting and program by a locksmith).

Chips damaged
Fiat 500 key fobs are wireless devices that transmit an electronic signal to the car when you press the button. It has a microchip that holds information about the code needed to connect with your car. If the chip is damaged, it can't transmit the correct code, and the car won't start. It is possible to repair this kind of damage and a locksmith will help. United Locksmith can complete this service on both classic as well as newer models, so do not be afraid to contact us.
You can buy a new fob and have it professionally programmed by locksmiths. It's cheaper to do this than going to the dealer and it works the same way. A locksmith will require specific details from you, like the year your car was made and the model's name.
Rub the chip with an old dollar bill if you're not certain what to do. The copper in the bill is abrasive and will get rid of dirt and oxidation. However, it won't cause harm to the microchip. The chip may not be repairable in the event that it has been physically damaged. This could happen if you drop it or get it pushed over by your vehicle.
Water Damage
If you've accidentally dropped your keys in the pool, left them in your purse while swimming at the beach, or splashed them with water on a wet day it's likely your fob will suffer from water damage. Even if it only has some water on the key, it could cause major problems with its electronics and stop it from functioning efficiently.
The good news is that it is possible to solve this issue by taking off the key fob and using a paper towel to clean it of any remaining water or dirt. Once the fob has dried it is possible to replace its battery. It should then start working again.
You can take it to an auto repair shop or locksmith to get it professionally programmed and cleaned. These experts can use special equipment to ensure that the key fob is compatible with your car's computer system.
When your Fiat 500's key fob fails to function, it can be stressful and disorienting. It's costly and difficult to transport your key fob to the dealer. A locksmith can replace your key fob with no need to visit an auto dealer. Locksmiths are better than a dealer since they can take care of all aspects of your car's key fob replacement without the need for a dealership visit.
Pairing Issues
When you drop your key fob or it stops working and there is nothing problem, it could be the chip that is malfunctioning. This can be due to water damage, a dead battery or it may just need reprogramming.
Most of the time, this can be accomplished by following the directions in the owner's manual. However fiat key cover to get an auto locksmith do this if you're having issues or the instructions in your manual aren't working for you. This will ensure that your chip isn't damaged and is likely to be the most cost-effective solution.
A few hundred owners have reported that their key fobs will not lock their cars. This could be an issue if you're at the gas station to refill. Some owners have complained that the locking system of their 500 malfunctioned and they've needed to replace the entire intermediate steering shaft. Fiat has actually mentioned this problem in an technical bulletin (TSB).
If you're experiencing issues with your Fiat or other car, the services of a reliable locksmith can help. They'll duplicate your existing key or design a new one that will lock and start the car. They are able to do this without looking at your old key, and it's typically cheaper than buying a new one from the dealer.