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Reasons Your Fiat 500 Key Fob Won't Work

A key fob for the Fiat 500 allows you to easily open doors and start your car. There are many reasons the fob won't work. It could be due to a dead battery, water damage, receiver module issues, and interfering.

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

Dead Coin Battery

A dead battery is the main cause of your 500 key fob that isn't working. fiat 500 replacement key have a limited range of operation and must be within a few inches of the vehicle in order to function. If you are far from your vehicle and press the keyfob button it will not respond, and display the message "Key Fob Not Detected".

If this happens, simply replace the coin cell battery (Part number CR2032) with a new one from a trusted brand such as Panasonic, Duracell, or Energizer. They are available at the local hardware store or on the internet.

You can test the battery in the coin-cell by pressing the buttons while you are standing close to your Fiat 500. The car will flash its parking lights, and the key fob should operate the lock and unlock buttons.

If the fob's key doesn't function after replacing the battery, it might be damaged by water, which prevents it from communicating with the receiver module in your vehicle. Water damage can happen through a variety of methods, including simply splashing or submerging your key fob in saltwater at the beach. If you believe your fob was exposed to water, put it in a bag of rice to draw out the moisture. If this doesn't work, your fob will probably need to be reset by a professional auto locksmith or by the dealer.

Water Damage

While the fob comes with rubber seals that keep water out of the chip's electronic circuit, submerging it in the ocean or washing it in a machine could cause water damage. Saltwater can be particularly harmful to the fob's circuit board which causes it to short out and eventually end up dying. It's not a good idea to soak the fob in water but don't give up even if you accidentally drop the fob in the water or don't take it out of your pants pocket.

First, remove the battery. Clean the electronic chip using isopropyl alcohol or another similar product and dry it thoroughly before replacing the battery. Check the fob again to see if it is working. If the fob doesn't work, it may have to be programmed again. This is usually handled by a professional or dealer auto locksmith.

If your key is older and not programmed to work with your vehicle it is necessary to replace it completely. This is a simple procedure which can be accomplished by a professional locksmith for automotive use. The locksmith will need the key cut to match your car's ignition. They will also need to reprogram the fob in the car's system. It's a simple and cost-effective process that can be completed on the same day.

Receiver Module Issues

The 500 key fob could be inoperable because it's out of range. The remote's range is of 30 feet. Therefore, in the event that you are far from your car, it won't respond to your commands. It can be solved by moving it closer to your vehicle until it starts responding.

If you've replaced your coin battery (commonly called a "button" or "watch") and your fob still won't work it could be due to an internal circuit board problem. In the majority of cases, reprogramming your fob will resolve this problem. You can find the instructions on how to do this for most automobiles by searching YouTube or consulting the owner's manual.

It may be necessary to replace the clips made of metal that hold the coin batteries in place. If they loose tension, it can prevent the coin battery from sitting properly and could cause the remote to malfunction.

In rare cases it is possible that the fob will become disconnected from your vehicle due to software or hardware issues. This can be a major issue, but you are able to usually fix it by visiting a local dealer or auto locksmith to reprogram your fob for you. In some instances, they may need to reinstall the program in your body control module, too.

Interference

Interference can also cause the key fob to be unable to receive or transmit an signal. This could happen if the key fob is near the radio transmitter (cell phones or radar detectors) or another source of electromagnetic radiation. The key fob may not work because of a problem with the buttons or water damage, or damage to the internal chips.

If the key fob has been unable to function for a while out of the blue or even after trying everything you can at home to solve it e.g. replacing the battery, reprogramming it and using the spare key fob, it could have a faulty receiver module on your 500. The receiver module, located under the dashboard, receives radio frequency signals from your key fob. It converts them into electronic commands that the vehicle interprets.

There is a simple way to reset the 500's onboard system including the keyfob. Disconnect the battery 12 volt for approximately 15 minutes by removing the negative cable first then the positive cable. Reconnect the battery. This will get rid of any remaining electricity and restart the car's computers, which can help you the key fob to function again. If the problem persists you should consult an expert technician. They will be able to identify the exact cause of any issues.