BMW Brake System Warning Lights: Major Safety Alert

Hey there! I had very similar issues with my 2015 BMW 3 Series diesel last year. Those multiple warning lights showing up together usually points to something more complex than just worn brake pads. In my case, it turned out to be an undervoltage problem that was messing with the ABS module and brake system. Had to get the battery and alternator tested. The battery was fine, but the alternator wasn't supplying enough power, which caused all those systems to act up. The spongy brake pedal was a side effect of the ABS module not functioning properly due to insufficient power. This was definitely a serious issue that needed immediate attention. Not something you want to ignore, as it affects critical safety systems. Got it fixed at a BMW specialist, they replaced the alternator and recalibrated the ABS module. Car's been running perfectly since then. Based on your symptoms, I'd recommend getting it checked by a qualified BMW tech who can properly diagnose the electrical system. Don't waste time with regular mechanics on this one. Hope this helps!

Thanks so much for sharing your experience! This is super helpful and sounds exactly like what I'm dealing with. Just wondering, do you remember roughly how much you ended up paying for the whole fix? And has everything been working smoothly since, or have you noticed any other quirks pop up? Really appreciate your help with this!

Hey again! Happy to help! Yeah, so after taking it to the mechanic last week, they confirmed it was indeed an undervoltage issue just like I suspected. The total bill came to 240 € for fixing the electrical problem. Pretty reasonable considering all the diagnostic work they had to do. And you'll be glad to know those brake problems I mentioned before are completely sorted now. The pedal feels nice and firm again, and all those warning lights have stayed off. Been driving it daily for several months now without any problems. The car's running like a dream! Actually, it's funny you asked about other quirks, nope, nothing at all! Once they fixed that alternator issue, it was like having a completely different car. Even my fuel economy seems a bit better now, though that might just be my imagination. Just make sure you get yours checked out soon, these electrical gremlins can cause all sorts of weird issues if left too long. Let me know how it goes when you get it sorted!

Thanks again for all the details! I actually just got back from the mechanic today, and wow, what a difference! The issue was exactly what you described, faulty alternator causing all those weird electrical problems. The final bill was a bit higher than yours (around 300), but honestly, it was worth every penny. The brake pedal's back to normal, all those annoying warning lights are gone, and the car feels so much more responsive now. The mechanic I found was great too, way better than my last one. They took the time to explain everything and even showed me the old alternator. Crazy how one failing part can cause so many problems! Really grateful for your advice about getting it checked by a proper BMW specialist. You saved me from wasting time with regular mechanics who might've just thrown parts at the problem. The car's running perfectly now, feels just like when I first got it! Thanks again for helping me sort this out. Good to know I can count on fellow BMW owners for solid advice!