How To Install New Porsche Car Key Battery

If you’ve noticed that your Porsche’s key fob is not working well or at all, this probably means that you need to replace its internal battery. Below is a quick guide which will help you do this without having to take the vehicle to a dealer.

Step One

To reach your fob’s key battery, it will be necessary to first extract its emergency key. To do this, flip the fob over so its back is showing.

Step Two

Press its release button which should be visible on its bottom. This should reveal its emergency key.

Step Three

Extract the key slightly outward, and then lift it upward against its plastic casing. At this point the dark, circular plastic part should be able to lift easily from the remaining fob. It might be necessary to completely remove the key which will require a screwdriver so its back cover can be taken off.

Step Four

Now extract the worn battery, and then insert the replacement. Be sure your new battery faces the right direction.

Step Five

Place its cover back into position then press it slightly. Next, return your emergency key to its original position and you’re done.

How Porsche Key Fobs Operate

Aside from a working battery, key fobs need three other components to operate correctly, which are:

• The reader
• The door
• A lock mechanism

The configuration initiates through the usage of code which has been imprinted inside the microchip. This chip uses the assigned frequency which communicates with a reader directly. Once a code and frequency lines up, your Porsche’s door will open. Every fob retains a distinct code that is unlike any other. This means that only 1 fob can initially be assigned for opening a specific car door.

However, it may be possible for Porsche to generate multiple fobs which utilize an identical code for a single reader. This arrangement enables multiple parties to gain access to the same vehicle.

What Does the Reader Do?

The vehicle’s remote reader is responsible for scanning information which is contained inside its key fob. When a driver passes their fob in the reader’s front it either accepts this data then performs the desired action (opening the door) or it will reject the data and do nothing.

Readers use a transmitter which transmits signals to a fob that in turn will adjust the transmitter frequency. The fob acquires its power via magnetic energy which will be exchanged between a unit as well as a remote reader. Because this power is magnetic battery power isn’t always necessary. When a battery is not needed, manufacturers may create miniature fobs which can fit inside key rings, and they may also be stored within smaller cases.

However, there are times when the reader needs to be bigger in order for a transmitter to distribute signals across extended distances. The frequency which is most commonly used for this purposes s 125 kHz. Porsche has also incorporated multiple security features into their key fobs to ensure unauthorized users do not gain access to their vehicles.