Automotive community for BMW
Not familiar with the recent models, but if I understand your OP correctly, the "someone" may be referring to a simple hose connection popping off due to the clamping force being insufficient to hold under turbo pressure.
Pop the hood and look for any connections that may be loose or disconnected on the high pressure side of the turbo to the intake.
Good luck!
Edit: typo
Thanks - you were absolutely correct.
We gave up and just took it to the mechanic who charged us $750 for a replacement.
However, when he showed us the old one, it was actually in decent shape but he said that the metal clamp ring for the hose had been replaced by an improvised one made of wire! (The other side had the "standard" one which was purpose built).
So double annoyed that it could have probably just been a replacement clip instead of a whole new part, but also... What is the point of paying for yearly service checks if nobody has spotted this dodgy job before?
Oof. Sorry that happened. I'll continue do my own work whenever possible for reasons such as this.
Glad you got it sorted, at least!
What's the last seven of your VIN? That seems like a very high price for a pressure hose. I'd be interested in getting the BMW part number and seeing what Fcp sells it for...