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Reasons Your Fiat 500 Key Fob Won't Work

A key fob for the Fiat 500 is a great way to unlock the doors and start the car. There are a myriad of reasons why the fob may stop functioning. These include a dead coin battery or damage to the receiver module, water problems, and interference.

This listing is for an NEW replacement fiat 500 key cutting Flip Key Remote - similar to the Ilco brand that must be programmed professionally by a local locksmith (click here for Locksmith Search). This remote includes trunk, lock and unlock buttons.

Dead Coin Battery

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

If this happens then replace the battery for your coin-cell (Part Number CR2032) with a new battery from a reputable brand like Panasonic Duracell or Energizer. They are usually available at 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 500x key fob replacement 500. The parking lights will flash and the key fob will operate the lock and unlock switch.

If the fob's remote doesn't function after replacing the battery, it may be damaged by water that blocks it from communicating with the receiver module in your vehicle. Water damage can happen in many ways, such as the simple splash or submerging your key fob in saltwater at the beach. If you suspect your fob was exposed to water, put it in a dry rice bag to draw the moisture out. If this fails, you'll have to get your fob replaced by an auto locksmith or a dealer.

Water Damage

Water damage can happen if you immerse the fob in the ocean or wash it in a washer. Saltwater can be particularly harmful to the fob's circuit board, causing it to short out and eventually die. It's not the best idea to submerge the fob in water however, but don't give it up when you accidentally drop it in water or forget to remove it from your pants pocket.

First, remove the battery from the fob. Before replacing the battery clean the electronic chip with isopropyl, or a similar product. Check the fob to check if it's functioning. If the key isn't working it could need to be programmed again. This is typically handled by a professional or dealer auto locksmith.

If your key is old and not programmed for your vehicle You will need to replace it completely. A professional locksmith for automotive will be able to complete this process. The locksmith must cut the key to match the ignition of your vehicle. They will also need to program the fob into the car's system. This is a fast and cost-effective process that can be completed on the same day.

Receiver Module Issues

Your 500 key fob may not work 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 car, it will not respond to your commands. It is possible to 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 the fob won't work it could be due to an internal circuit board problem. In most cases, reprogramming the fob will solve the issue. There are instructions on how to do this on the majority of vehicles 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 the correct position. If they loose tension it can prevent the battery from sitting properly, and this will cause your remote to malfunction.

In rare instances, the fob can become out of sync with your vehicle because due to hardware or software issues. This could be a huge issue, but you are able to frequently fix this issue by visiting an auto locksmith to reprogram your fob for you. In some cases, the software may also require reinstallation in your body control modules.

Interference

In addition to a dead coin battery The key fob might not be able to receive or transmit the signal due to interference. This can happen when the key fob is in proximity to the radio transmitter (cell phones or radar detectors) or any other 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 your key fob suddenly stopped working, or you've tried everything at home to resolve it (e.g. battery replacement, reprogramming and using the spare key fob, you may have a malfunctioning receiver module on your 500. The receiver module is located under the dash, and it picks up the radio frequency signals from the key fiat fob. It converts the signals into electronic commands, which are then interpreted by the vehicle.

There is a simple way to reset the 500's on-board system including the keyfob. 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 allow you to restart the computer in your car. This can help get your key fob to function again. If the issue persists it is recommended that you consult a certified technician. They'll be able determine the exact cause of your issues.