Fiat 500 Replacement Key Fob It's possible to replace the battery if the 500 remote key fob is not working. If you replace the battery, but it's still not working, the problem may be somewhere else. At United Locksmith, we specialize in making new keys for old cars. We have all the tools and components needed to provide this service. Dead Coin Battery The most frequent reason that your Fiat 500 key fob will not lock or unlock the doors is due to a dead battery. The key fob contains the battery of a coin-cell which will quickly drain when it isn't being frequently used. If your remote began to show signs of weakness such as a loss in range and stopped working completely The battery is probably dead. Metal clips hold the battery securely on the key fob. If the clips aren't secure, they can cause problems with contact, which can prevent your remote from receiving power. By using a small flathead screwdriver, pull the retaining clip to take out the battery and replace it with a new one. Choose a battery that is the same size, voltage and specification as the original. Exposure to water can cause the key fob to corrode, or even become damaged. Even a brief bath in soapy water may harm the electronic chip in. It is recommended to keep your key fob in a dry place. Water Damage If your key fob isn't working properly, it could be due to water damage. The rubber seals on key fobs keep them from getting damaged by a small splash or drizzle of water. However, it is crucial to keep the keys from the washing machine, the ocean and the pool. The key fob comes with an electronic chip which sends an immobilizer system of your car. This is what allows your 500 to start or lock, but if the chip gets saturated, it won't be able to longer function. You can clean the internal electronics of your key fob using isopropyl alcohol or an electronic cleaner to see if they are still good. However, it is probably better to purchase a new one from a dealer rather than trying to repair an item that was submerged in salt water. A replacement fob can cost you a bit, but it's a lot less expensive than paying to have your Fiat 500 towed to a dealership and repaired there! Plus, you can do it yourself with only a few steps. Make sure you have the correct type of battery before you attempt to open your key fob. You can find step-by-step instructions for every car keyfob online. Faulty Chip The chip in the key fob communicates to your car's immobiliser system to ensure the vehicle is only able to start when the correct key is inserted. If the chip is damaged, or corrupted in any way it will not start. A damaged chip could occur due to a variety of reasons but most commonly due to water damage or the battery being dead. Whatever the reason, it is a good idea to leave the work to a locksmith as they can replace the chip fast and at a low cost. If your key fob does not work after being exposed to clean tap or rain water take the battery off. Wipe down the electronic component with paper towels. If the key fob still isn't working it's most likely to be a damaged chip and must be replaced. https://www.thekeylab.co.uk/fiat-car-keys/ will go to their dealer when they are in need of an entirely new Fiat key fob, however this is a costly alternative. If you are seeking a cost-effective solution to have your Fiat key fob fixed make sure you contact United Locksmith. We have the tools and knowledge required to repair your Fiat key fob in a quick and professional way. Faulty Receiver Module Fiat key fobs transmit an electronic signal to the vehicle that can unlock and lock doors (and start the car for those with an automatic transmission) up to 50 feet. However there are several things that can cause the fob to stop functioning. This can be caused by a dead coin-battery, water damage, worn out buttons an issue with the receiver, signal interference or a malfunctioning chip. If the fob was in the pocket of someone who has suffered severe trauma (such as being dropped onto the floor or washed in a washing machine) it might not be in a position to communicate with the Body Control Module (BCM) of the car. The BCM is a security device which will only accept signals from genuine keys. If this is the case, you will need to replace your fob. A professional locksmith will manage the entire key replacement process including programming a new one for your 500. They can even give you an clone fob that performs exactly like the original (and costs only a fraction of what it would cost).