Cayenne unlocking / Alarm random response

[Khaled Doulami]

Hello all, 

i have a huge problem that it bothers me on my cayenne CS 04 9PA to the point that i got really depressed...

The key decides randomly to respond or not to locking / unlocking which makes me panic every time i am leaving / coming into the car. 
the red flashing light sometimes goes on and sometimes off completely ( not flashing neither detecting the key ).

Although when i mechanically open it and put the key in the ignition and start it the alarm will go on and never goes off.

i got the car to the only porsche dealer in Tunisia and they Said i need a new Alarm unit ( Kessey) which i bought and installed, reprogrammed the keys but the problem never gone away.

i drove it back and they told me to leave it. Now it is 2 weeks after and everytime i call them they say it is working.

i went to get the car and as soon as i used the second key the indicators instead of flashing they stayed on for a long while until i clicked again the button.

i am suspecting a corrosion somewhere but this randomness of working / not working make me think it is a relay or another unit ( maybe the comfort controlling module on the back ) is the problem.

We diagnosed it with Launch X and also at the dealer and we have no signs of bad antennas or any other problems apart from an air mass sensor that i am going to change anyway ( i am buying it from abroad since it costs 1100 dollars aprox at The dealer ).

please guys if anyone can recommend anything let me know.

Edited September 6, 2020 by Khaled Doulami