BMW Z4 Multiple System Failures, E-Brake Issues

Hey there! I had a pretty similar situation with my 2013 BMW 3 Series last year (I'm fairly experienced with BMWs, been working on them as a hobby for a while). Those symptoms sound exactly like what I dealt with, parking brake failed, hill assist gone, the works. Turns out the electric motor in the brake caliper was shot. Took it to my trusted workshop and they diagnosed it spot on. The repair cost me about 505 Euro, but it fixed all those issues in one go. The mechanic explained that when this motor fails, it triggers all those other system warnings because they're interconnected. Before I can share more specific advice, could you share: Have you scanned for specific error codes? Is there any grinding noise when engaging the parking brake? Did these issues start gradually or all at once? I'd love to help more, and knowing these details would help determine if you're facing the same problem I had with my 3 Series.

Thanks for the detailed response! Just had my last service about 3 weeks ago at 70301 KM, and these issues started popping up suddenly yesterday. No grinding noise when trying to engage the brake, but I do hear a faint clicking sound. Haven't been able to scan for codes myself yet, planning to do that tomorrow. Really hoping it's just the motor like in your case because the symptoms match up perfectly. Bit worried it might be something more complex since it's affecting so many systems at once.

Hey again! Yeah, those symptoms you're describing, especially that clicking sound, are ringing some serious bells. It's almost identical to what I experienced with my 3 Series. That clicking noise is actually what convinced my mechanic to check the brake motor first. Just so you know, when mine failed, it also happened pretty suddenly after a routine service. Funny coincidence, right? Mine was around 75000 KM when it decided to give up. The fact that all these systems went haywire at once actually makes me more confident it's the brake motor, these BMWs are pretty interconnected when it comes to their electronic systems. Listen, while you're waiting to get those codes scanned, try not to worry too much about it being something more complex. Like I mentioned before, fixing the motor sorted out all those warning lights and system failures in one go. The clicking sound you're hearing is pretty much the smoking gun here, it's the motor trying but failing to engage properly. Just make sure when you get it checked out, they specifically look at that brake caliper motor. Sometimes they might want to chase down each system separately, but based on my experience, starting with the e-brake motor will probably save you time and money. Let me know what those error codes show up when you scan it. I'm really curious to see if they match what I had. Keep us posted!

Thanks so much for following up! That's really reassuring to hear that my situation matches yours so closely. I feel much better knowing it's probably not going to be some massive electrical nightmare. It's wild how similar our issues are, right down to the timing after service and mileage. I'll definitely make sure to push for checking the brake motor first when I take it in. You've probably saved me a bunch of time and stress with this info. I'll scan those codes tomorrow and post them here, would be interesting to see if they match up with what you had. Really appreciate you taking the time to share your experience in such detail. I'll keep you updated on what I find out!