Fiat 500 Key Fob Replacement
If your 500 key fob ceases working, use another one to see if it can be detected by the car. If it does, then it could be a problem related to the battery or water damage on the original fob.
First replace the battery. Make sure that the new #CR2032 coin cell battery is properly inserted with the "+" side facing downwards in the fob.
Dead Battery
The majority of the time, when a fob's not working, it's because the battery is dying. It's a simple fix, and most fobs provide a warning signal if the battery is in low. You can find the instructions on YouTube for nearly every car's key fob or look in the owner's manual. You can also replace it by taking it to an expert locksmith or the dealer who sold it to you.
Other times, a device can cease to function, and it could be a problem with the internal circuit board. It's not common, but it does occur. If you dropped the fob on a hard object, it can damage the internal chip. This is also the case if you use an aftermarket key and the fob won't work. In this scenario it is required to see a dealer or locksmith to have the key reset to make it compatible with your 500.
One 2012 FIAT 500 Flip Key Remote - resembles Ilco brand with lock, unlock and trunk buttons. New replacement keyless entry remote (will require cutting and programmed by locksmith)
Chips that are damaged
A key fob with the fiat 500 number is a wireless device that provides the signal to the car to start when you push the button. It is equipped with a microchip that contains information about the code needed to communicate with your car. If the chip is damaged, it won't transmit the correct code, and the car won't start. It is possible to repair this type of damage and a locksmith could help. United Locksmith is capable of offering this service to classic models as well, as for newer models, so don't be in a rush to call them.
You can buy a new fob and have it professionally programmed by a locksmith. It's less expensive to do this than go to a dealer and it works the same way. You'll have to provide some information for the locksmith, like the year your car was manufactured and its model.
Rub the chip with an old dollar bill if you're not sure what to do. The copper in the bill is abrasive, and can remove oxidation and dirt. However, it will not harm the microchip. If the chip is physically damaged, it might not be capable of being repaired. This can happen when you fall it, ram it over with your vehicle or other form of physical strain.
Water Damage
If you've accidentally dropped your keys in the pool, left them in your pocket while swimming at the beach or splashed them with water on a rainy day It's likely that your fob will suffer from water damage. Even if it only has some water on the key, this can cause serious problems for the electronics inside and stop it from working correctly.
The good news is that you can often solve this problem by removing the key fob and using a paper towel to clean it of any remaining dirt or water. After the fob is dry and clean, you can replace its battery and it should begin working again.
You can take it to an auto repair shop or locksmith to get it professionally cleaned and programmed. These professionals will use special equipment to make sure that the fob's key works with the computer in your car.
If your Fiat 500's keys fob isn't working, it can be stressful and disorienting. You may be tempted go to the dealer to get your key fob replaced but this could be costly and inconvenient. A locksmith can replace your key fob, without having to visit a dealership. They are a far better choice than an auto dealer.
Pairing Issues
When you drop your key fob, or it stops working, and there's nothing the issue, it could be the chip that has gone off the rails. This could be due water damage or a dead battery, or it may just need reprogramming.
This can be accomplished by simply following the directions in the owner's manual. However it's best to hire an automotive locksmith do this if you're having issues or the instructions in your manual don't work for you. This will ensure that the chip won't be damaged and is likely to be the least expensive option.
A few hundred owners have reported that their key fobs do not lock their vehicles. This could be a problem when you want to fill up at an gas station. Some owners have reported their 500's locking mechanism breaking and having to replace the entire intermediate shaft of the steering. Fiat has actually cited this problem in a technical bulletin (TSB).
A reputable locksmith will assist you in the event that your Fiat is experiencing issues. They can duplicate the key you have or make you a brand new one that is able to lock and start the car. They can do this without seeing your old key, and it's usually cheaper than buying a new one from the dealer.