The brake lines that leave the master cylinder and route down to the frame rail. There is a short, flexible connection between the body side hard brake line, and chassis side hard brake line. This connection consists of braided flexible steel hose with crimped connections securing it to the hard line. All of the crimps on the flexible connection in that area are collecting dust build up, and have a wet appearance to them. When you touch them, you get an oily residue on your fingers. Yes it is available for inspection. If air enters the braking system where it is leaking, this will cause the brakes to become inoperable, due to air being more compressible than brake fluid. No it has not been inspected by the dealer. And it has not been confirmed by a dealer, I have not brought it to them yet. There has been no indication of the leak from within the vehicle, it is not dripping under neath. I only found it because I was checking the oil and inspecting other items at the same time. Noticed it around 28k miles