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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 a variety of reasons why the fob may stop working. These include a dead coin battery or water damage, receiver module issues, and interfering.

This listing is for an NEW replacement Fiat Flip Key Remote - an exact replica of the Ilco brand that must be professionally programmed by a local locksmith (click here for Locksmith Search). It includes lock, unlock, and trunk buttons.

Dead Coin Battery

A dead battery is probably the most common cause of your 500 key fob not functioning. Modern key fobs come with a limited range of operation, and must be within a few feet of the vehicle in order to function. If you are further away 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 battery of your coin cell (Part number CR2032) with a fresh one from a reputable brand like Panasonic, Duracell, or Energizer. They are available at the local hardware store or on the internet.

After you've changed the battery on the coin cell It is possible to test it by standing in front of your Fiat 500 and pressing the buttons. The car should flash its parking lights, and the key fob will operate the lock and unlock switches.

If your fob's key isn't working after replacing the battery, it could be water damage that prevents it from communicating with the module inside your vehicle. Water damage can occur in a number of ways, ranging from a light splash to submerging your fob in salt water at the beach. If you suspect your fob was exposed to water, try putting it in a dry rice bag to pull the moisture out. If this does not work, you'll need to have your fob replaced by an auto locksmith or a dealer.

Water Damage

Water damage can happen if you immerse the fob into the ocean or wash it in a washing machine. Saltwater can cause the circuit board to short, and eventually end up dying. If you get the fob wet, it's not an ideal choice, but if you drop it in a glass of water or forget to remove it from your pants pocket prior to running the washing machine, don't give up hope.

First remove the battery from the fob. Before replacing the battery clean the electronic chip using isopropyl or another similar product. Test the fob next to verify if it's working. If the fob doesn't work, it may need to be programmed again. This is usually done by an auto locksmith or dealer.

If your key is a bit older and not programmed for your car You will need to replace it completely. A professional automotive locksmith can do this job. The locksmith will need the key to be cut to match your car's ignition. The locksmith also needs to reprogram the fob into the vehicle's system. This is a fast and affordable process that can usually be completed the next day.

Receiver Module Issues

The 500 key fob you have may not function because it's out of range. The remote typically has an area of 30 feet or less, and if it's too far from your vehicle, it won't respond to your commands. It is possible to fix this by moving the remote closer to your vehicle until it responds.

If your fob won't work after replacing the coin battery, also called a "button", "watch" or "button", it could be due to an issue with the circuit board inside. Reprogramming the fob usually resolves this issue. You can find directions on how to do this for all automobiles by searching YouTube or looking through the owner's manual.

It is sometimes necessary to replace the metal clips that hold the coin batteries in place. If they lose tension, it can prevent your coin battery from sitting properly and cause your remote to malfunction.

In rare cases the fob could be desync'd with your vehicle because of software or hardware issues. broken can cause a major issue, but you are able to usually resolve this issue by visiting an auto locksmith to reprogram your fob. In some instances, they may need to install the software again in your body control module, too.

Interference

Interference can also cause the key fob to not receive or transmit signals. This can occur when the keyfob's location is in close proximity to a radio transmitter like a cellphone or radar detector. The key fob might not function because of a problem to the buttons 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 after trying every option at home to solve it e.g. replacing the battery, reprogramming it and using the spare key fob, you could have a malfunctioning receiver module on your 500. The receiver module is situated under the dash and receives the radio frequency signals from the key fob. It transforms the signals into electronic commands that are then read by the vehicle.


There is a simple way to reset the 500's internal system, including the keyfob. Disconnect the battery of 12 volts 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. This could allow you to get your key fob working again. If the problem persists you should seek out an expert certified technician. They will be able to determine the exact cause of issues.