Peugeot 208 Key Replacement
It is best to delegate the replacement of Peugeot keys for 208 to auto locksmiths that have the equipment and know-how. They can design and program keys faster and less expensive than dealerships.
If your key fob stopped locking or unlocking your doors it is likely due to a dead coin battery. There are other possibilities that the key is malfunctioning.
Dead Coin Battery
A dead coin battery will stop your Peugeot 208 from locking or unlocking, and will not start the engine. In this scenario you'll need to employ the alternate method of starting that is described in the owner's manual.
Another reason why your 208 may not start is because the spark plugs are been worn down. The spark plugs ignite the fuel to start the engine. They only last for a certain amount of time. If they're not used enough to last, they'll eventually fail.
There is a simple solution for this problem. The best way to solve this issue is to measure the voltage of your car battery with a multimeter. If the voltage is less than 11,5 volts, then it's time to replace it. If the battery has corrosion it is essential to clean its contacts. You can do this by lifting the rubber covers that protect the two terminals on the battery and using wire brushes to clean any corroded areas of the battery. Then, reconnect the positive and negative pole cables.
Water Damage
If your 208 doesn't start and the battery hasn't been replaced, you must check the spark plugs. It is possible that they are overly dirty, which causes them not to spark. peugeot 107 replacement key cost G28 Car Keys can be cleaned in a workshop.
Peugeot cars have a transponder key that works with the car's ignition system. This ensures that only the correct key can turn the engine. If the chip inside the Peugeot key is damaged, it will not send the proper signal to the vehicle.
Water damage is the most common cause of this issue. This is especially prevalent in colder climates. the vehicle might have been exposed to rain or snow. In this case, contact an experienced locksmith who has the necessary tools and equipment to reprogram the key. They'll also have the latest technology and machinery required to make the Peugeot smart key. The process shouldn't be more than 15 minutes.
Contacts for the battery that are defective
Peugeot changed from the carbon-encased transponder chips to an entirely new kind of chip that utilizes electronic components that are placed on a circuit board. This new technology works great when it's brand new, however, over time, the circuit boards start to degrade and stop working properly.
This can stop the immobiliser from working, so your vehicle won't be able to start. If this is the case, it's recommended to contact a Peugeot specialist or locksmith.
The most frequent issue is when the battery in the key fob begins to die. This causes the blade of the key to stop feeding into your lock. A locksmith in your car can replace the battery and cut a fresh blade for you, it's typically a quick fix.
Faulty Receiver Module

If your Peugeot key fob stopped working after dropping it on the floor, being exposed to a sudden downpour or accidently washing it may be due to a defective receiver module. The receiver module is responsible for transmitting radio signals to the onboard computer which regulates the central locking system of your Peugeot vehicle.
The key fob itself has rubber seals that block water from reaching the electronic chip inside. However, prolonged exposure to water could cause damage to these seals and the chip. Submerging the key fob in the ocean at the beach or throwing it into the pool can be especially damaging because of the high salt content.
If your Peugeot spare key fob stops working it is necessary to have the module replaced. This can only be done by a skilled auto locksmith or Peugeot specialist. As opposed to other cars, Peugeot keys are protected by an immobilizer that is unique and requires the correct code to begin the engine. This is the reason why you should only be able to trust a professional Peugeot locksmith for the job of designing and programming the replacement.
Computer on board is not working properly
The on-board computer inside your Peugeot is responsible for a variety of the systems in your vehicle, from power windows to airbags. If something is wrong with these systems, it'll typically display a code indicating the problem. This code will be stored in the system until the problem is fixed. Usually, this will mean replacing the computer on board.
One of the most common causes of the light turning on is loose or corroded connections within the airbag sensor. This could be due to wear and tear, aging or exposure to moisture and salt. It is essential to have this issue resolved as soon as you can, as a malfunctioning airbag can be dangerous in the event an accident.
If you find an error message that says "card not found" on your Peugeot key fob, the battery in the key fob may be weak or dead. This prevents the key fob from transmitting a signal that will disable your vehicle's standard immobilizer. Try this by pressing the unlock key on the key fob and then trying to start your car. If this does not work then the battery in the key fob is in need of replacement.