Weak Battery Woes: Porsche Macan Owners Share Solutions

I have some experience working on cars and faced almost the same issue with my 2012 Porsche Cayenne last winter. The symptoms were identical, weak cranking and flickering lights. Turned out my battery sensor was faulty, giving wrong readings to the car's electrical system. Took it to my trusted Porsche specialist who diagnosed and replaced the sensor. Total bill was around 315€ including parts and labor. Car's been running perfectly since then. What's your Macan's mileage and have you checked if the battery itself is still the original one? This info would help determine if we're dealing with the same problem. Also, does your check engine light come on?

Thanks for sharing your experience! My Macan's at 147671 KM and just had its service last month. Good point about the battery sensor, I haven't considered that. No check engine light showing up, which is a relief. The battery is actually the original one from 2014, so maybe it's just reached the end of its life? I'll definitely get that sensor checked too though, since your situation sounds so similar to mine.

Hey again! Yeah, after hearing about your mileage and especially that it's still running on the original 2014 battery, I'm pretty confident that's your main issue. My Cayenne had its battery sensor problem at around 130,000 KM, but I had already replaced my battery once by then. Looking back at my previous reply, while the sensor was my problem, your case seems more straightforward, that battery is definitely due for replacement. Most Porsche batteries, even the good ones, typically last 4-6 years max. You've gotten an impressive 9 years out of yours! Just to give you a heads up from my experience, when I did have to replace my Cayenne's battery (before the sensor issue), it cost about 450€ at the dealership. You might find better prices elsewhere, but make sure to get one that meets Porsche's specs. The correct battery is crucial for these cars since they have pretty demanding electrical systems. Would definitely recommend getting this sorted soon. These symptoms usually get worse pretty quickly, and you don't want to end up stranded somewhere. Let us know how it goes!

Thanks so much for the detailed follow-up! You've actually made me feel a lot better about this, I was worried it might be something more complex (and expensive!). You're right, getting 9 years out of the original battery is pretty impressive, but I probably shouldn't push my luck any further. I'll call my local Porsche dealer tomorrow to get a quote, but might also check out some authorized service centers to compare prices. Really appreciate the heads-up about the cost and the tip about sticking to Porsche specs, definitely don't want to risk using the wrong battery. Will update the thread once I get it sorted! Cheers for all the help!