Reasons Your Fiat 500 Key Fob Won't Work
A key fob for Fiat 500 makes it simple to open doors and start your car. There are many reasons the fob may stop working. It could be due to a dead battery, water damage, receiver module issues, or interference.
This listing is for an NEW replacement Fiat Flip Key Remote that looks like the Ilco brand. It has to be professionally programmed (click here to search for local automotive locksmiths). This remote includes lock, unlock and trunk buttons.
Dead Coin Battery
The most frequent reason that your 500 key fob doesn't work is the battery is dead. Modern key fobs have a very limited operating range, and should be within a few feet of the vehicle to operate. If you are further away from your car and push the keyfob button it will not respond, and display the message "Key Fob Not Detected".
If this happens, replace the coin-cell battery (Part Number CR2032) with a new battery from a reputable brand such as Panasonic Duracell or Energizer. You can find them at your local hardware store or on the internet.
After you've replaced the battery in the coin cell, you can test it by standing in front of your Fiat 500 and pressing the buttons. The parking lights should blink and the key fob should operate the lock and unlock switches.
If the fob's key doesn't function after replacing the battery, it might have water damage that prevents it from connecting to the receiver module in your vehicle. Water damage can happen in a variety of ways, from a light splash to submerging the fob into salt water at the beach. If you suspect that your fob has been exposed to water, put it in a bag of rice to draw out the moisture. If this fails, you'll require your fob to be replaced by an auto locksmith or a dealer.

Water Damage
Water damage can occur when you submerge the fob in the ocean, or wash it in a machine. Saltwater can cause the circuit board to become shorted and eventually die. Getting the fob wet is not an ideal choice but if you drop it into an empty cup of water, or fail to take it out of your pants pocket before running the washer, don't give up hope.
Remove the battery first. Clean the electronic chip with isopropyl or a similar product and then dry it thoroughly before replacing the battery. Then try the fob and see if it works. If the key does not function, it may need to be programmed again. This is typically handled by a dealer or professional auto locksmith.
If the key is older and has not been programmed to your car It will most likely need to be replaced completely. This is a simple procedure which can be accomplished by a professional automotive locksmith. The locksmith will require the key cut to match your vehicle's ignition. The locksmith also needs to program your fob into the vehicle's system. This is a simple and cost-effective procedure that can usually be completed on the same day.
Receiver Module Issues
The 500 key fob you have may be inoperable because it's out of range. The remote has a range of 30 feet. So should you be too far away from your vehicle, it won't respond to your commands. You can easily solve this issue by moving the remote closer to your vehicle until it responds.
If you've replaced the battery on your coin (commonly known as a "button" or "watch") and your fob still won't work it could be due to an internal circuit board issue. Reprogramming your fob can resolve the issue. You can find the procedure for the majority of vehicles on YouTube or in the owner's guide.
It is possible to replace the clips made of metal that hold the coin batteries in the correct position. If they lose tension, it can prevent the battery from being seated properly and could result in the malfunction of your remote.
In rare instances, the fob may be out of sync with your vehicle because of hardware or software problems. You can fix this issue by visiting your local auto-locksmith or dealer to reprogram your key fob. In some instances the software might need to be reinstalled in your body control modules.
Interference
Interference can also cause the key fob not to receive or transmit a signal. This is possible when the key fob is located near the radio transmitter (cell phones, radar detectors) or any other source of electromagnetic radiation. Other reasons why the key fob might not work include a poor connection to the buttons or damage to the internal chip, or water damage.
If your key fob suddenly stopped working, or if you've tried everything at home to fix it (e.g. replacing batteries, reprogramming or using the spare key fob, it could have a faulty receiver module on your 500. The receiver module, located beneath the dashboard, receives radio frequency signals from your key fob. It converts them into electronic commands that the vehicle interprets.
There is fiat key replacement near me to reset the 500's onboard system including the keyfob. Disconnect the battery for 15 minutes, removing first the negative cable, then the positive cable. Then, reconnect the battery. This will remove any residual electricity and restart the car's computer system, which can help get your key fob working again. If the problem persists you should consult an expert technician. They can determine the exact cause of your issues.