Weird Sound
 

In all 3 suspension levels, when the steering wheel is turned all the way to the left there is a loud bang / pop. What is making the noise?

is the vehicle moving or stopped or does it happen both ways

it has to be moving

You know what? Mine does that too! Like when im backing out of a driveway and have wheel cranked hard either side, makes a 'clunk' both sides do it depending on which way the wheel is turned. Also if im moving forward into a driveways slowly. CLUNK. I figuered its just a part of the air suspension? hmmm.....anyone else?

I was going to say the steering limiter but this works on both sides!

That's basically my exact conditions as well

I don't have the air suspension and mine does it once in a while also...backing out of my garage with the wheel fully turned. This starts to sound like one of those weird traits that our X have.

I have a 2004 and my X5 has been doing the same exact thing since new. Its a 2004. How many others does this affect and what year X5 do you guys have. I have been to the dealer several times since i bought it for this reason and every time i go they say they cant replicate the noise and that it is fine. Thats bullshit because it does it to me every time i back out of the garage and turn the wheel also when i parallel park. I think all 2004 X5s ahve this problem some worse than others and BMW is not admiting it. So why dont we try to get together and do something about it. I am afraid if something gives way at speen like on the highway we will be in trouble. Its got to be the steering or suspension.

Mine is also a 2004, but it doesn't do it all the time...only about once per month. Because it's so intermittent, I know what the dealer will say if I take it in...so I hadn't bother trying to get it diagnose.

Mine did it like once a month too in the begining but know it has 13000 miles on it and its all the time