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After exiting the motorway tonight, I noticed as I pulled away from the junction that there was no familiar surge of turbo boost. After a few more junctions and some walking pace stop-start traffic, a warning message popped up on the driver's display: "Brake system service required". On the next brake application, the pedal went solid - thankfully the slow pace of traffic meant that I was able to stop the car without too much of an issue.
I checked under the bonnet and found that a pipe at the back of the (d5204t4) engine had broken (see photo).
Closer examination showed that the connector of the circular (valve?) part had broken and was still lodged in the short length of pipe. With a little assistance, I found that holding the 2 ends of the pipe together resulted in the brake pedal behaving more normally. A temporary repair was made to get the car the short distance home.
I've checked VIDA and I cannot find the post number for the short length of pipe not the circular part. Does anybody know what these parts are (I suspect it is part of a vacuum system?) and what the part numbers are?
Car is a 2013 D4.

I checked under the bonnet and found that a pipe at the back of the (d5204t4) engine had broken (see photo).

Closer examination showed that the connector of the circular (valve?) part had broken and was still lodged in the short length of pipe. With a little assistance, I found that holding the 2 ends of the pipe together resulted in the brake pedal behaving more normally. A temporary repair was made to get the car the short distance home.
I've checked VIDA and I cannot find the post number for the short length of pipe not the circular part. Does anybody know what these parts are (I suspect it is part of a vacuum system?) and what the part numbers are?
Car is a 2013 D4.