As I work through the issues on my new-to-me 2002 Audi TT, I discover more and more things that need to be fixed. While I was fixing the secondary air pump in the engine bay, I happened to come across a set of hoses in front of the engine that were broken. These hoses are part of the N249 system, which is related to emissions. Because of the age of the vehicle and the exposure to heat from the engine, the piping on the N249 system tends to break, which can cause a vacuum leak in the emissions system.