ECS sells a hose kit for the X5M. Just double check against your vehicle as some have the "M" confused with "M-Sport". If you have a X5 50i then the process is a little more involved. Try reclamping as mentioned above. If hoses look good then you can replace the Tee with a 1/2" brass tee and reclamp. If hoses are crap then you can buy the individual parts with metal lines and unclamp the hoses and replace (~$225 for all four lines). That trick works for all the lines coming directly from turbos. If the hoses which dive down are crap then you need to pull a few things. The big expense comes if you have to replace metal lines going to turbos as they need to pull turbos. The other dragon hose is the one with the "Y" running under the drivers side turbo. The only real way to replace that is to pull the alternator. All the hoses up top should be around $1500 from Indie shop. I'd never use a dealer for this repair.
https://www.ecstuning.com/b-genuine-...RoCHs4QAvD_BwE