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Reasons Your Fiat 500 Key Fob Won't Work

A Fiat 500 key fob makes it simple to open doors and start your vehicle. There are a myriad of reasons why the fob won't be functioning. These include a dead coin battery, damaged receiver module, water damage problems, and interference.

This listing is for an NEW replacement Fiat Flip Key Remote that looks like the Ilco brand. It needs to be professionally programmed (click here to search for local locksmiths in the automotive industry). It includes trunk, lock and unlock buttons.

Dead Coin Battery

The most common reason your 500 key fob will not work is a dead battery. Key fobs of today have a limited range of operation and must be within a few inches of the vehicle in order to function. If you're far away from your vehicle when you press the key fob button, the car won't respond, and will display an "Key Fob Not Detected" message in the instrument cluster.

If this happens you need to replace the battery of your coin-cell (Part Number CR2032) by a brand new one of a trusted brand such as Panasonic Duracell or Energizer. You can find them at the local hardware store or on the internet.

You can test the coin-cell battery by pressing the buttons while standing close to your Fiat 500. The parking lights should light up and the key fob will operate the lock and unlock switches.

If your fob's key isn't working after replacing the battery, it may be water damage that is preventing it from communicating with the module in your vehicle. Water damage can occur in many ways, including simply splashing or submerging your key fob in saltwater at the beach. If you suspect that your fob was exposed to water, place it in a rice bag to draw out the moisture. If this doesn't work, your fob will probably require reprogramming by a professional auto locksmith or the dealer.

Water Damage

Water damage can happen if you submerge the fob in the ocean, or wash it in a machine. Saltwater poses a particular risk to the circuit board of the fob and can cause it to short out and eventually end up dying. The fob getting wet is not a good idea however, if you drop it in an empty cup of water, or fail to remove it from your pocket before you run the washing machine, don't give up hope.

First, remove the battery from the fob. Clean the electronic chip with isopropyl or a similar product and dry it completely before replacing the battery. Then test the fob to see if it works. If the key does not function, it may need to be reset. This is usually done by an auto locksmith or dealer.

If the key is older and was not programmed to your car, it will likely need to be replaced completely. This is a simple process that can be carried out by a professional locksmith for automotive use. The locksmith will need to cut the key to match the ignition in your vehicle. The locksmith also needs to reprogram the fob into the car's system. This is a cheap and quick procedure that can be completed within the same day.

Receiver Module Issues

One of the main reasons your 500 key fob may stop functioning is that it's out of range. The remote typically has 30 feet of range or less and if it's far from your vehicle, it won't respond to your commands. It's easy to solve this issue by moving the remote closer to your car until it responds.

If you've replaced your coin battery (commonly known as a "button" or "watch") and the fob isn't working It could be because of an internal circuit board issue. In the majority of cases, reprogramming your fob will solve the issue. You can find instructions on how to do this on the majority of automobiles by searching YouTube or reading the owner's manual.

You may have to replace the metal clips that hold the coin battery. If they loose tension, it may prevent your battery from sitting properly, causing your remote to malfunction.

Locked keys In fiat 500 rare cases the fob might become desync'd with your vehicle because of software or hardware issues. This issue can be fixed by visiting your local dealer or auto-locksmith to reprogram your key fob. In some instances they might need to reinstall the software on your body control module, as well.

Interference

Interference can also cause the key fob to not receive or transmit an signal. This can occur when the keyfob is in close proximity to a radio transmitter like a cellphone or radar detector. The key fob might not work due to a poor connection with the buttons water damage or damage to the internal chips.

If your key fob suddenly stopped working, or you've tried everything at home to solve the issue (e.g. battery replacement, reprogramming and using the spare key fob, you may have a faulty receiver module on your 500. The receiver module is situated under the dash and picks up the radio frequency signals from the which lost key to car fiat fob. It converts them to electronic commands that the vehicle interprets.

Fortunately, there's an easy method of resetting all on-board systems in your 500, including the key fob. Disconnect the battery for 15 minutes by taking off first the negative cable, then the positive cable. Reconnect the battery. This will clear any residual electricity, and restart the car's computer. This will help you get your key fob to work again. If the issue persists, you should seek out an expert technician. They will be able to determine the exact cause of your problem.