Hey there! I had a similar issue with my 2018 Porsche Cayenne last year (I have some experience with Porsche vehicles). The alarm would go off out of nowhere, especially during rainy days, super annoying! Took it to my trusted workshop and they found faulty sensors in the alarm system. They had to replace a couple of sensors and recalibrate the system. Cost me around 250€, but it fixed the problem completely. Haven't had a single false alarm since then. What's the weather like when your alarm triggers? And does it happen more often when parked in specific locations? These details might help pinpoint if it's the same issue I had.

Thanks for sharing your experience! I've noticed mine tends to go off more frequently when parked on slight inclines, which makes me lean towards the tilt sensor theory. Had my latest service just a month ago and they didn't catch anything unusual in the system. Currently at 97870 KM and wondering if anyone else started experiencing this around similar mileage? I'm particularly curious about the sensor replacement process you mentioned, was it a lengthy procedure? And did you use an official Porsche dealer or an independent specialist?

Hey again! Yeah, the tilt sensor acting up on inclines definitely sounds familiar, that's exactly how mine started too. My Cayenne had about 85,000 KM when the issues began, so pretty close to your mileage actually. About the repair, I went with an independent Porsche specialist that I've been using for years (they're really good with Porsche electronics). The actual replacement only took about 2 hours, but they kept the car for a day to run thorough tests and make sure everything was calibrated properly. It's worth mentioning that they discovered the tilt sensor wasn't the only culprit, there was also a loose connection in the hood sensor that was contributing to the false alarms. One thing I learned from my experience, if you're getting it fixed, make sure they check all the sensor connections while they're at it. Could save you another trip to the shop later. My guy said these issues are pretty common in our generation of Porsches, especially as they clock up the miles. Hope this helps! Let me know if you need any other details about the repair process.

Thanks so much for all that detailed info! That's super helpful, especially about checking all the sensor connections. I've got a good independent Porsche specialist nearby who I think I'll take it to next week. Really appreciate you mentioning the hood sensor too, I'll definitely have them check that while they're at it. Interesting that yours started around the same mileage. Makes me feel better knowing it's a somewhat common issue and not just my car being weird. I'll probably follow your approach and have them keep it for a full day of testing to make sure everything's sorted properly. Thanks again for sharing your experience, you've given me a much clearer idea of what to expect. I'll update the forum once I get it fixed in case anyone else runs into the same problem!