2011 Panamera S.

The alarm has been heavily acting up for a good while now, no idea why.
I just wanna remove it and get rid of the system fully. I already disconnected the alarm horn which is behind the front-right wheel bearing, and now only the hazard lights come on.

I do not really care about replacing the alarm, since I live in an extremely safe neighborhood, and just want the issue done with. I had to disconnect the battery a few times since the alarm would NOT go off, and leaving the trunk slightly open at night, when the car's not in use. I can hear some ticking in the trunk (most likely from the alarm). Maybe the car thinks it's stolen? Sensor issues? Probably. The weird thing is that, after driving for exactly 5 minutes, the alarm hazard lights go off. Although if you open the door (I'm assuming triggering a sensor), the alarm lights, both interior and exterior, comes back on. I tried using my keyfob to de-activate it by pressing the unlock button, but it would not work (weird, as I recall it working a few months ago).

I hope it is DUI-able, if not, then I'll probably have to take it to some garage, where a guide or a general reference would be heavily appreciated.

Thanks in advance.

 

You need to change alarm horn

 

If the car thinks it's being stolen it's not going to allow it to start. Are you sure your car battery isn't on it's way out? It's common that when the car battery's get low, the whole system starts to act up.

Also do you have the touch buttons on the door handles? Are they all working?

 

Right now, the car is fine and the alarms aren't being triggered.

I'm unsure how to check if my battery's good or not, but it goes up to 14volts when the car is on, per the cluster on my Panamera.
I have the touch buttons on my door handles, and they're just fine, they work. I have keyless entry/drive option.

My theory is that someone triggered the alarm, way before, and the alarm killed the battery. (I live in an apartment, so I can't really hear or see my car if the alarm is triggered). After triggering that alarm with whatever, the car was locked so I had to go into the rear and unlock the boot manually, then charge up the battery and reconnect it. Maybe that has something to do with it? After I did that, the alarm was being triggered randomly and used to stay on unless the battery was disconnected. But recently, it sort of fixed itself when I reconnected the battery once, and everything's been alright since.

Hope this provides some more context.
Will a missing part from the alarm system cause it to go haywire? Because I disconnected the horn way before.

 

That sounds like a low voltage thing. Check the date on your battery

 

Willdo, how often should the battery be replaced by the way? I'm pretty sure these are beefier batteries that should last longer than usual.

 

I would say if it's an OEM battery, 8-10 years. My 14 Audi A4 that I bought new, is on it's OG battery, but it's on its way out.

These cars have so many electronics, it strains them even though they're huge batteries. You could always try to trickle charge it. It seems as if the alt charged the battery and the issue went away after you drove it...

 

I just checked the battery, it was installed by the previous owner.
"Globatt 12v 100AH 60038 PACE Classic Series - CCA 850 - DIN100 SMF"
No idea what that is, it says it was installed in 2020.

Assuming it's a normal battery, it's due for a change now isn't it?
Probably gonna put a Bosch in there or something soon, if I can find it.

 

Is it an AGM battery?

 

I have no idea.

 

It should say it on the battery. But a good battery should last more then 4 years... You might have a bad cell. But have you experienced anything else weird or has the issue since come back? You might have fixed it by just driving it and recharging. But keep in mind you might need to replace in the near future.

 

Never had any issues honestly, everything's fine in the car. I have a spare ACDelco battery which I never used, also 12v and 100AH.
Might install it but idk, not risking putting some ACDelco stuff in it.

Gonna work on replacing it soon, but so far the alarm's fine. I'm dealing with the PDK service right now and the central locking system (which might have something to do with the alarm trip).

There's some weird stuff going on with the driver door (Which I reckon is the actuator), again, replacing soon. Which might be tripping the alarm. I recall when the alarm issue was going on, the whole car would unlock/lock, including the driver door.

Now, the alarm issue is gone, and the driver door has to be opened from the inside, or using the key or window. The whole car unlocks/locks, except the driver door (via the keyfob i mean). This was a previous issue of the car which was solved when the ALARM issue started. VERY WEIRD, I KNOW. So yeah, perhaps the central locking system.

For all I know, it could just be the keyfob battery too.. god knows. Wish we had someone with a PIWIS here, but they're rare as hell.
If you got any recommendations based on the mess you just read, feel free to let me know haha.

 

Start with the battery.

But that sounds like Audi/VW"s Kessy issues. The keyless go module. I'm not sure what Porsche calls it. But look up Kessy issues on some other forums if it's not the correct name for Porsche.. My VW Touareg had Kessy issues, and it was doing similar to what you are describing. I just don't know what Porsche calls the module. It may be called Kessy.

 

Alright, gonna most likely take a look this weekend.

 

Hi guys, update.

So, replaced the battery with a spare I had, not the best, but it'll do for now. All went well so far.
Tried to take a look at the keyless entry module, but it was fine.. although the central locking buttons on the interior don't work, interesting.

Anyways, just today the (old) battery, before i replaced, died. Maybe of it's age, or maybe an electrical leak, I do not know. But that's after I let the car sit for around 3 days without turning it on, since I got pretty busy with work. I just checked on it a few hours ago and found it dead. Keyfob wouldn't do anything, so I had to open the car trunk and replace the battery with my spare, and start it, which worked great, instead of jump-starting the car.

Here's the important part for anyone facing this issue in the future!!!!
I figured a way to close the alarm generally. Make sure the driver door and window are open. As soon as you connect the battery, just spam the unlock button. You will hear the alarm system ticking for around 1 minute in the rear, or less, but no lights will come on, then the flasher lights will go away. Temporary solution for now, but then the car operates normally, so I can take it to work.

I suspect an electrical leak causing the battery to die, or just the old age of that battery. We'll find out soon.
As for the alarm system and the central locking system, I still did not give up and might try to find a piwis locally here to try and diagnose it better. Still did NOT give up.