How to Repair Fiat 500 Keys There are many reasons your Fiat 500 key FOB may stop working. The small "watch" inside the key FOB often dies. This is an 3.3-volt lithium CR2032, and you can get it anywhere for less than $3. A locksmith is the best choice to call if need a new car key for an old Fiat model. United Locksmith offers this service and has all the tools and parts needed. Keys On the outside a Fiat key may seem basic, however inside the casing is a chip that communicates with your vehicle's immobiliser system. If the chip is not present, or not properly programmed to the immobiliser, your car isn't able to start. Car Keys Solutions can offer you dealer-standard equipment and technology to repair your Fiat key, even if the key has been damaged or lost. A spare key can keep your vehicle operating in the event of an accident or lockout. We can provide you with a standard blank key or a remote fob. We only use the highest quality blanks and offer a fast turnaround time so that you can be back on the road in no time. Some people prefer to visit a Fiat Dealership to get an updated key. We can offer the fastest and most affordable service. You'll also save the towing charges of bringing your vehicle from and to the dealership as we can bring it to you. This can also reduce the time it takes to wait which can range from a few days to 10 days. Remotes Remote controls for Fiat cars look like the keys themselves, with the exception that they feature an IR (infrared) LED on the top. This LED sends an IR signal to the device which opens or turns off the car when the button is pressed. The microprocessor inside a key converts this signal into a code, which is then transmitted to the device. This is referred to as "keyless entry". The more recent your car is and the more likely you are to feature a keyless entry system. The more recent your car has, the more features you'll likely find in it. This includes locking and unlocking your car with just pushing a button and opening the doors with out touching the handle, and much more. The key fob is equipped with an integrated circuit chip that communicates with the immobiliser system in the car. The system can tell if the correct key is in place by examining a specific sequence of digits in the transponder chip. If the chip isn't present, or if it has not been programmed with the correct immobiliser, then the vehicle will not start. If the fob for the key is damaged, a locksmith can make a replacement. They'll also need to program the replacement key to sync with the vehicle's immobiliser. This is a crucial part of the process, and you should be prepared to give information about your vehicle to the locksmith when they call. Keyless Entry If you have keys-less entry on your Fiat 500, you can lock and unlock the car from anywhere with a push of the button. This technology is increasingly common in all types of cars that adds security and convenience to the use of your vehicle. Examine your remote keyless entry system is not working. The battery inside the fob might be dead. If the battery is empty, replace it with a new one that has the same voltage, size and type as the original. Also, make sure that the battery contacts are clean and free from corrosion or dust. The key fob has rubber seals that shield the electronic chip from water, however, prolonged exposure to soapy or salty water may cause the chip to fail. If your key fob has been exposed to water, you must remove it and let the battery dry completely before replacing it. You can also clean the electronic chip using isopropyl alcohol, or an electronic cleaner. While some people may believe that keyless entry is less secure, the system is actually more secure than other systems because the code used to unlock your car gets rolled up after each use. This means that hackers won't be able to gain access to your vehicle, even in the event that they intercept the signal. Transponders Fiat utilizes a crypto key transponder system, which means that the keys and transponders have to be encoded with a secret code by the Body Control Module (BCM) before being "programmed" into the BCM. A blank key that is not programmed can't be programmed because the BCM must read and write the secret key onto the transponder before locking it. This is referred to as cloning. These are brand new replacement outer case OE SIP22 transponder keys to your Fiat 500. https://www.thekeylab.co.uk/fiat-car-keys/ contain a chip that opens the doors and also starts the car. Locksmiths need to cut them to fit the ignition.