BMW 4 Air Suspension Causing Multi-System Malfunction

Hey there! I had almost identical issues with my 2019 BMW 5 Series 520d last winter. The sagging and uneven stance were the first signs, followed by those annoying warning lights. Got it checked at the garage and, just like you suspected, it was the air suspension valve. They had to replace the valve assembly and recalibrate the entire air suspension system. The whole job took about two days since they needed to diagnose other potential issues. In my case, the faulty valve was causing strain on the compressor and affecting the transmission control module readings, which explained the rough shifting. It's definitely not something you want to ignore, the uneven weight distribution can cause serious damage to other suspension components and even affect your steering geometry. My advice would be to get it checked ASAP at a certified dealer or a specialist who really knows BMW air suspension systems. Hope this helps with your decision.

Thanks so much for sharing your experience! It's really helpful to hear from someone who went through the same thing. Sounds like I'm on the right track with my suspicions about the air suspension valve. Just wondering, do you remember roughly how much the whole repair ended up costing? Also, has everything been running smoothly since the fix, or have you noticed any other issues pop up?

Hey there again! Happy to give you an update! Yeah, the repair job set me back 590 €, honestly, worth every penny though. The mechanic confirmed it was exactly what we thought, a faulty air suspension bellows valve. Got that sorted out and I'm telling you, it's like driving a completely different car now! Since getting it fixed last week, the car's been running like a dream. No more sagging, those annoying warning lights are gone, and the transmission's shifting smooth as butter. Even the ride comfort is back to what you'd expect from a BMW. It's such a relief not having to worry about that weird lean anymore! One thing I learned from all this, don't wait around when these suspension issues pop up. Getting it fixed quickly probably saved me from bigger headaches down the road. If you're still on the fence about getting yours checked out, I'd say go for it. The peace of mind alone is worth it! Let me know if you need any other details about the repair. Always happy to help out a fellow BMW owner!

Thanks for all the details! Your advice really helped me take action. I actually just got back from the mechanic today. You were spot on about getting it fixed quickly. My repair came in a bit higher at 780 €, but they found some additional wear on the connecting lines that needed replacing. The mechanic was great, really took the time to explain everything and even showed me the worn-out parts. No upselling or pressure, just straight facts. The difference in how the car drives now is incredible! It's sitting perfectly level again, those warning lights are gone, and the transmission's working perfectly. Got to say, I was nervous about trying a new mechanic after my last experience, but this turned out so much better than expected. Really appreciate you sharing your experience. It definitely gave me the confidence to get this sorted before it turned into something worse. Think I've finally found a trustworthy mechanic too, so that's a bonus!