The Fiat 500 Keys Awards: The Most, Worst, And Strangest Things We've Ever Seen Fiat Panda Key Fob Replacement

Fiat Panda key fobs contain a transponder chip that sends the signal to your vehicle to unlock the doors or start the engine. However, the fob can stop working for several reasons.

A dead battery for the coin is the most common reason for a key fob malfunction. Other causes are water damage or a damaged module and interference signals.

Dead Coin Battery

If the battery in your key fob has failed, the initial step is to replace it. Use a button cell that has the same voltage, size, and specifications as the old one.

If the key fob was exposed to water, like a splash of rain or salt water on the beach, it will have to be cleaned before it is able to be used again. The best solution is to use a paper towel that has been soaked in isopropyl or electronic cleaner.

If the key fob hasn't been exposed to water but still does not work it could be due to a problem with the receiver module or an internal electronic chip. Reprogramming the keyfob using an OBDII scan may aid in these situations.

Water Damage

If your key fob has taken a bath in the puddle or pool or walked down the washing machine, you might have some water damage. It is usually possible to get it back to working by taking off the battery and then scrubbing the circuit board with isopropyl alcohol. It is a good idea to allow the fob to dry completely before putting in a brand new battery.

There could be a problem with the module when your key fob ceases working after replacing the battery or reprogramming. You can find the instructions for reprograming the majority of remote keys on YouTube, or consult your owner's manual. You can also reset the computer in your car with the OBDII scanner tool.

Faulty Receiver Module

The key fob has the chip that communicates with the car's system. The chip will stop sending and receiving signals to the car when it is damaged. This can be caused by dropping the key fob or by water exposure. If the key fob you have purchased has stopped working due to exposure to water it is possible to fix it if clean the chip with electronic cleaner or isopropylethanol.

If fiat 500 replacement key uk fob doesn't respond to cleaning, it's possible that the module has an issue and must be replaced. A faulty receiver module can also cause the remote control key to not function. This usually happens due to electromagnetic interference.

Faulty Electronic Chip

The electronic chip that is in your key fob plays an important part in the anti-theft security system of your car. It sends out a signal the immobiliser unit of the vehicle to determine whether the key is valid. The car won't start when the chip is damaged.

A damaged chip could be caused by interference signals from other objects like bad weather conditions or transmitters operating on the same frequency close to your car. In this case the replacement fob will be needed.

Contacts with the battery may be damaged.

The battery contacts of the fob's key can be damaged by excessive usage. If they're damaged or bent, the key fob will not transmit any signals to the receiver modules in the car.

Modern fobs feature rubber seals to keep out water. A splash of water or light rain is fine but submerging them into saltwater can damage the chip's electronic components.

The key fob houses an electronic chip that communicates with the vehicle's immobilizer system in order to activate it. The system relies on cryptocoding systems in newer vehicles and the older red key system in older ones. If this chip is faulty it must be replaced.

Faulty 12 Volt Batterie

A faulty battery may cause the key fob not to function. The car's computer will not recognize the remote if this happens.

Test the battery with the voltmeter before replacing it to determine its capacity. A fully charged battery should display 12.6 volts. If the reading falls significantly then it's time to replace the battery.

Install an electrical charge for a short time on the battery to check its capacity. This will take away about 1% of the charge on the surface. After that, measure the voltage. The higher the capacity of the battery, the longer it can keep its voltage. The ideal scenario is to keep it close to 12 volts for several minutes.

Faulty Radio Signal

This is the main cause of a key fob that ceases to send signals to the car. The battery could be replaced to fix this problem. It is crucial to purchase batteries that have the same dimensions and voltage as the original.

Fobs are not indestructible and are susceptible to damage. The battery buttons and the contacts are fragile which means they could be bent or broken with excessive use.

A signal can also be impacted by other transmitters or objects that use the same frequency. For instance, a light control panel in your home could transmit interference using the same frequency as key fobs use. This can interfere with the remote control of your car.

Faulty OBDII Scan Tool

There are a number of reasons why a scanner may not work. Some are more complex than others.

Professional scan tools permit mechanics to observe the car's networks and perform a variety of self-tests. These tools can save time, but are expensive and not accessible to the majority of DIYers.


If your OBD2 scan tool won't power on, check voltage at terminals 16 (scantool power) and 4 (chassis earth). If they're both in good shape, it's likely that a fuse has blown. This is the most frequent reason for a scan tool to fail. The easiest solution is to replace the blown fuse.