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Reasons Your Fiat 500 Key Fob Won't Work

A key fob for Fiat 500 makes it easy to open doors and start your car. There are many reasons why the fob won't work. It could be due to a dead battery damaged receiver module, water damage problems, and interference.

This listing is for an NEW replacement Fiat Flip Key Remote - look-alike Ilco brand that needs to 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 the main reason for your 500 key fob being inoperative. Modern key fobs come with a restricted operating range, and should be within just a few feet of the vehicle to function. If you're far from your vehicle, and you press the key fob button the car won't respond and will display the "Key Fob Not Detected" message in the instrument cluster.

If this occurs you need to replace the battery of your coin-cell (Part Number CR2032) by a brand new one of a reputable brand such as Panasonic Duracell or Energizer. They are usually available in your local hardware store, or online.

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

If your key fob still isn't working even after replacing the battery, there may be water damage which is preventing it from communicating with the module in your vehicle. Water damage can occur in many ways, including the simple splash or submerging the key fob saltwater at the beach. If you believe your fob was exposed to water, place it in a bag of rice to draw out the moisture. If this isn't working, you'll need to have your fob replaced by an auto locksmith or a dealer.

Water Damage

While the fob has some rubber seals to keep water out of the electronic chip inside it, submerging it in the ocean or washing it in a machine could cause water damage. Saltwater can cause the circuit board to become shorted and eventually cease to function. If you get the fob wet, it's not an option however, if you drop it into a cup of water or don't remember to take it out of your pants pocket prior to running the washing machine Don't give up hope.

First take the battery off the fob. Before replacing the battery clean the electronic chip with isopropyl, or a similar product. Test the fob afterward to verify if it's working. If the fob doesn't work, it may have to be reset. This is typically done by a dealer or professional auto locksmith.

If the key is older and has never been programmed to your vehicle it is likely to need to be replaced completely. This is an easy process that can be carried out by a professional locksmith for automotive use. The locksmith needs to cut the key to match the ignition in your vehicle. The locksmith will also have to reprogram your fob in the vehicle's system. This is a low-cost and quick process that could be completed the same day.

Receiver Module Issues

One of the main reasons why your 500 key fob might stop working is because it's out of range. The remote has a maximum range of 30 feet. Therefore, if you are too far away from your vehicle it won't respond to your commands. You can fix this by moving the remote closer to your vehicle until it responds.

If you've replaced your coin battery (commonly known as"button" or "button" or "watch") and the fob won't work, it could have an internal circuit board problem. In fiat 500 key fob replacement of cases, reprogramming your fob will resolve this problem. You can find the instructions for most vehicles on YouTube or in the owner's guide.

You may have to replace the metal clips that hold the coin battery in place. If they loose tension, it could prevent the coin battery from being properly seated, and this will cause the remote to malfunction.

In rare cases, the fob may become disconnected from your vehicle due to software issues or hardware issues. You can fix this issue by visiting your local dealer or auto-locksmith to reprogram your key fob. In certain instances it may be necessary to install the software again in your body control module too.

Interference

Interference can also cause the key fob to not be able to receive or transmit a signal. This could happen if the key fob is located near a radio transmitter (cell phones or radar detectors) or any other source of electromagnetic radiation. The key fob may not function due to a poor connection to the buttons or water damage, or damage to the internal chips.

If the key fob has stopped working one day in the middle of the night, or after trying everything you can do at home to resolve it e.g. replacing the battery, reprogramming, and using the spare key fob, it could have a malfunctioning receiver module on your 500. The receiver module is situated under the dash and is able to pick up the radio frequency signals from the key fob. Then, it converts them into electronic commands that the vehicle interprets.

There is a simple way to reset the 500's in-board system including the keyfob. Disconnect the battery for 15 minutes by taking off first the negative cable, then the positive cable. Then, reconnect the battery. This will get rid of any residual electricity and restart the car's computer system, which could help the key fob to function again. If the issue continues you should speak with an expert certified technician. They will be able to determine the root of your problems.