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Reasons Your Fiat 500 Key Fob Won't Work

A key fob from Fiat 500 is a great way to unlock the doors and get started the car. There are a myriad of reasons the key fob might stop working. This could be due to a dead battery and water damage, as well as problems with the receiver modules, and interference.

This listing is for a NEW replacement Fiat Flip Key Remote that is similar to the Ilco brand. It needs to be professionally programmed (click here to find local automotive locksmiths). Includes lock, unlock, and trunk buttons.

Dead Coin Battery

A dead battery is the most frequent cause of your 500 key fob that isn't working. Modern key fobs operate with a limited operating range and should be within only a few feet from the vehicle to operate. If you are 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 you need to replace the battery of your coin-cell (Part Number CR2032) with a new battery of a reliable brand, such as Panasonic Duracell or Energizer. They are available at the local hardware store or on the internet.

You can test the coin-cell battery by pressing the buttons while standing near your Fiat 500. The car will blink its parking lights, and the key fob should work the lock and unlock switches.

If the fob's remote doesn't work after replacing the battery, it might have water damage that prevents it from connecting to the receiver module inside your vehicle. Water damage can happen in a number of ways, ranging from an accidental splash to submerging the fob salt water at the beach. If you suspect that your fob has been exposed to water, try placing it in a dry rice bag to draw the moisture back out. If this doesn't work, your fob may need to be reset by an experienced auto locksmith or by the dealer.

Water Damage

While the fob has some rubber seals that keep water from the chip's electronic circuit and out of the ocean or washing it in a machine could cause water damage. Saltwater poses a particular risk to the circuit board of the fob which causes it to short out and eventually end up dying. In the event that you let your fob get wet, it's not an option but if you drop it into a cup of water or fail to take it out of your pants pocket before running the washer and you don't have a chance, don't give in.

First, remove the battery. Clean the electronic chip with isopropyl ethanol or a similar product and dry it completely before replacing the battery. Test the fob next to see if it is functioning. If the key isn't working, it may need to be reprogrammed. This is usually handled by a professional or dealer auto locksmith.





If the key you have is older and is not programmed for your car then you'll need to replace it completely. This is a straightforward process that can be handled by a professional automotive locksmith. The locksmith will require the key cut to match the car's ignition. They'll also need to reprogram the fob to the system of your car. This is a low-cost and quick process that can be completed on the same day.

Receiver Module Issues

Your 500 key fob might stop working because it is out of range. The remote usually has a range of 30 feet or less and if it's far from your car, it will not respond to your commands. You can easily solve this issue by moving the remote closer to your car until it responds.

If you've replaced the coin battery (commonly known as a "button" or "watch") and your fob still won't work, it could have an internal circuit board issue. In most cases, reprogramming the fob will solve the problem. You can find the instructions on how to do this for most vehicles by searching YouTube or reading the owner's manual.

You may need to replace the metal retaining clips that keep the battery of your coin in place. If they lose tension, they could stop the coin battery from sitting properly and result in the malfunction of your remote.

In rare instances, the fob might be out of the vehicle's sync because due to hardware or software issues. You can fix this problem by visiting your local dealer or auto-locksmith to reprogram your key fob. In some instances it is possible that the software will require reinstallation to your body control modules.

Interference

Interference can also cause the key fob to be unable to receive or transmit a signal. This could happen if the key fob is in proximity to the radio transmitter (cell phones and radar detectors) or another source of electromagnetic radiation. new fiat 500 key could not work due to a poor connection to the buttons or water damage, or damage to the internal chips.

If your key fob suddenly stopped working, or you have tried everything at home to fix it (e.g. replacing the battery, reprogramming it and using the spare key fob, you may have a damaged receiver module on your 500. The receiver module, which is located under the dashboard, picks up radio frequency signals from your key fob. It converts the signals into electronic commands which are then processed by the vehicle.

There's a quick and easy way to reset the 500's in-board system, including the keyfob. Disconnect the battery of 12 volts for approximately 15 minutes by taking off the negative cable first then the positive cable. Reconnect the battery. This will clear out any residual electricity and restart the car's computers, which could allow you to the key fob to function again. If the problem persists you should speak with an expert technician. They will be able to determine the root of any problems.