Reasons Your Fiat 500 Key Fob Won't Work
A key fob from Fiat 500 makes it easy to open doors and start your vehicle. There are many reasons the fob could stop working. These include a dead battery damaged receiver module, water damage issues, and interference.
This listing is for a NEW replacement Fiat Flip Key Remote that looks like the Ilco brand. It needs to be professionally programmed (click here to find local automotive locksmiths). This remote includes lock, unlock and trunk buttons.
Dead Coin Battery
A dead battery is the most common reason for your 500 key fob not working. Modern key fobs come with a limited operating range and must be within some feet of the vehicle in order to function. If you're far from your vehicle, and you press 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) by a fresh one of a reputable brand such as Panasonic Duracell or Energizer. You can usually find them in your local hardware store or online.
After fiat key 've replaced the coin cell battery, you can test it by standing next to your Fiat 500 and pressing the buttons. The parking lights should blink and the key fob will operate the lock and unlock switches.
If the key fob won't function after replacing the battery, it could be damaged by water, which prevents it from connecting to the receiver module in your vehicle. Water damage can occur in many ways, such as an easy splash or submerging your key fob in saltwater at the beach. If you suspect that your fob was exposed to water, put it in a bag of rice to draw out the moisture. If this does not work, you'll need to have your fob replaced by an auto locksmith or a dealer.
Water Damage
The fob does have rubber seals to keep water out of the chip's electronic circuit it, submerging it in the ocean or washing it in a machine could cause water damage. Saltwater is especially dangerous to the circuit board of the fob that can cause it to short out and eventually die. The fob getting wet is not an ideal choice, but if you drop it into an empty cup of water, or forget to remove it from your pants pocket prior to running the washing machine do not give up hope.
First take the battery off the fob. Before replacing the battery, clean the electronic chip with isopropyl, or a similar product. Then test the fob to check if it functions. If the key does not function it could need to be reprogrammed. This is typically done by a dealer or professional auto locksmith.
If the key is a newer model and hasn't been programmed to your vehicle, it will likely need to be replaced completely. A professional locksmith in the automotive industry can do this job. The locksmith will need to cut the key to match the ignition of your car. They'll also have to reprogram the fob for your vehicle's system. This is a fast and inexpensive process that is usually completed within the same day.
Receiver Module Issues
One of the most common reasons your 500 key fob may stop working is that it's simply out of range. The remote has a range of 30 feet. Therefore, when you're too far away from your vehicle it won't be able to respond to your commands. You can easily fix this by moving the remote closer to your vehicle until it responds.
If your fob isn't working after you replace the battery in the coin, also known as a "button", "watch" or "button" It could be a problem with the internal circuit board. Reprogramming the fob usually resolves this problem. You can find instructions on how to do this for all automobiles by searching YouTube or checking out the owner's manual.
It could be necessary to replace the clips made of metal that hold the coin batteries in the correct position. If they loose tension, it can stop your coin battery from being properly seated and cause your remote to malfunction.
In rare instances, the fob may be out of the vehicle's sync because due to hardware or software issues. This issue can be fixed by visiting your local dealer or auto-locksmith to reprogram your key fob. In some cases it may be necessary to install the software again in your body control module, too.
Interference
In addition to a dead battery on a coin, the key fob may not be receiving or transmitting an signal due to interference. This could happen if the key fob is in proximity to the radio transmitter (cell phones and radar detectors) or any other source of electromagnetic radiation. Other reasons the key fob could not function include a weak connection to the buttons or damage to the internal chip or water damage.
If your key fob suddenly stopped working, or you have tried everything at home to resolve it (e.g. It could be a defective 500 receiver module If you've tried replacing it with a battery, reprogramming it, or using an alternative key fob. The receiver module is situated under the dash, and it picks up the radio frequency signals from the key fob. It converts them to electronic commands that the vehicle interprets.

There's a simple method to reset the 500's onboard system, including the keyfob. Disconnect the battery 12 volt for about 15 minutes by removing the negative cable and then the positive cable. Reconnect the battery. This will get rid of any remaining electricity and then restart the car's computers, which could help get your key fob working again. If the issue continues, you should seek the advice of an expert technician. They will be able diagnose the exact cause of any problems.