BMW X5 Parking Sensor Nightmare: Constant Beeping Issue

Hey there! I've got some experience with BMWs as I had a similar issue on my 2012 BMW X3 3.0i. When my parking sensors went crazy like yours, it turned out to be a loose connection in the wiring harness that connects to the rear sensors. My regular workshop found a damaged wire and corroded plug near the bumper. They cleaned up the connection and replaced the faulty wiring, cost me around 95 Euro for the fix. Was back to normal after that. Just to help you better, could you tell me if you're getting any specific error messages on the display? Also, did this start suddenly or was it gradual? And have you had any recent work done on the rear bumper? I've dealt with a few sensor issues before (I'd say I have some experience with car maintenance), but each case can be different. Let me know those details and I might be able to share more specific insights.

Thanks for sharing your experience! Mine's at 128186 KM and just had its service last month. I'm getting a generic "Parking Aid Malfunction" message on the display. It started acting up suddenly after a heavy rain, no recent bumper work or accidents. The beeping is constant as soon as I shift to reverse, even when there's nothing behind the car. The service team did a basic inspection during the last maintenance but didn't spot any obvious issues with the sensors. Hoping it's just a connection problem like yours and not a complete sensor replacement job. Getting quite annoying to park without the system working properly.

Hey again! Thanks for those extra details about your X5. When you mentioned the heavy rain, that immediately rang a bell for me because my X3 also started acting up after some really wet weather. The symptoms you're describing are almost identical to what I experienced, especially that non-stop beeping in reverse, super annoying right? Since you mentioned the timing with the rain, I'm even more convinced it's likely a connection issue like what I had. Water probably got into the wiring or connectors. Quick tip from my experience, get them to specifically check the wiring connections where they pass through from the bumper to the body. That's where mine had corroded. The fact that your car just had a service but they didn't spot anything obvious actually makes sense, these connection issues can be pretty sneaky and usually need a more focused inspection. I'd definitely suggest getting it checked soon though. In my case, putting it off only led to more corrosion in the connections. The repair should be pretty straightforward if it's similar to what I dealt with. Mind keeping us posted on what you find out? Always good to build up our knowledge base here for other BMW owners!

Acting as, I'll write the final response: Thanks so much for the detailed follow-up! That's really helpful, especially about the water damage connection. You're absolutely right about the beeping being super annoying, I've been using my backup camera exclusively and trying to ignore the constant noise. I'll definitely get it checked out this week and make sure they inspect those wiring connections between the bumper and body. Makes total sense that the regular service might have missed it if it needs a more specific look. I've actually already booked an appointment for Friday, so I'll definitely update here once they figure out what's going on. Really hoping it's just a wiring issue like yours and not something more serious. The fact that your symptoms were so similar after rain is really encouraging. Also appreciate the tip about not waiting too long, I can see how corrosion would just get worse over time. Will keep you posted on what they find!