Reasons Your Fiat 500 Key Fob Won't Work
A key fob with the fiat 500 number is a convenient way to open the doors and start the car. There are many reasons why the key fob might stop working. This could be due to a dead battery, water damage, issues with the receiver module, and interference.
This listing is for an NEW replacement Fiat Flip Key Remote that looks like the Ilco brand. It must be professionally programmed (click here to find local locksmiths for your vehicle). Includes lock, unlock, and trunk buttons.
Dead Coin Battery

The most common reason your 500 key fob won't function is an inactive battery. Modern key fobs have a limited range of operation, and must be within only a few feet from the vehicle to operate. If you're not close to your vehicle and you press the key fob button, the car won't be able to respond, and will display an "Key Fob Not Detected" message in the instrument cluster.
If this happens, replace the battery of your coin cell (Part number CR2032) with a new one from a reputable manufacturer such as Panasonic, Duracell, or Energizer. You can typically find them at your local hardware store or online.
After you've replaced the coin cell battery you can test it by standing close to your Fiat 500 and pressing the buttons. The parking lights should flash and the key fob should operate the lock and unlock switches.
If the key fob won't function after replacing the battery, it may be damaged by water, which prevents it from communicating with the receiver module in your vehicle. Water damage can occur in a variety of ways, such as a simple splash or submerging the key fob saltwater at the beach. If you suspect your fob has been exposed to water, try putting it in a dry rice bag to pull the moisture back out. If this doesn't work, the fob might need to be reset by a professional auto locksmith or the dealer.
Water Damage
Water damage can happen if you immerse the fob into the ocean, or wash it in a washing machine. Saltwater is particularly dangerous to the circuit board of the fob, causing it to short out and eventually die. It's not the best idea to soak the fob in water, but don't give it up if you accidentally drop it in water or fail to remove it from your pocket.
Take the battery off first. Clean the electronic chip with isopropyl ethanol or a similar product and dry it completely before replacing the battery. Next, test the fob to test if it works. If the key doesn't function, it may need to be reprogrammed. This is typically done by a professional or dealer auto locksmith.
If G28 Car Keys have is older and has not been programmed for your car then you'll need to replace it completely. A professional locksmith in the automotive industry can complete this simple process. The locksmith needs to cut the key to match the ignition of your car. The locksmith will also have to reprogram the fob into the vehicle's system. This is a cost-effective and quick process that can be completed the same day.
Receiver Module Issues
One of the main reasons your 500 key fob could stop working is because it's out of range. The remote has a range of 30 feet, which means when you're too far away from your vehicle it will not respond to your commands. You can remedy this by moving your remote closer to your vehicle until it responds.
If you've replaced your coin battery (commonly called"button" or "button" or "watch") and the fob isn't working, it could have an internal circuit board problem. In the majority of cases, reprogramming your fob will resolve this problem. You can find instructions on how to do this for the majority of automobiles by searching YouTube or reading the owner's manual.
It's possible that you need to replace the metal clips that hold the coin battery. If they lose tension, it can prevent the battery from sitting properly, and this will result in the malfunction of your remote.
In rare instances, the fob may become disconnected from your vehicle because of software or hardware issues. This issue can be fixed by visiting your local auto-locksmith or dealer to reprogram your key fob. In some cases the software may require reinstallation to your body control modules.
Interference
Interference can also cause the key fob to not receive or transmit an signal. This can happen when the key fob is near a radio transmitter (cell phones or radar detectors) or another source of electromagnetic radiation. Other reasons the key fob might not work include a weak connection to the buttons or damage to the internal chip, or water damage.
If the key fob has failed to work one day out of the blue or after trying everything you can at home to fix it e.g. replacing the battery, reprogramming, and using the spare key fob, you may have a faulty receiver module on your 500. The receiver module is located under the dash and picks up the radio frequency signals from the key fob. It transforms the signals into electronic commands, which are then interpreted by the vehicle.
Luckily, there is an easy method to reset every single system on board in your 500 and include the key fob. Disconnect the battery for 15 minutes by removing first the negative cable, then the positive cable. Then, reconnect the battery. This will get rid of any residual electricity and restart the car's computers, which can help you get your key fob working again. If the issue continues, you should consult an expert technician. They can determine the root of your problem.