Looking at this curious hose on a 2011 A3 Quattro 2.0 TFSI that does a wiggle off the back of the fuel pump, thru some odd connectors and then into firewall. What is it? And more importantly, how would I remove it?
Ha. Worked it out - its brake booster vacuum hose. On the newer vacuum pumps, the vacuum hose runs to the firewall and then sneaks into the brake booster. Removal was pretty simple, just pulling/wiggling it off the vacuum pump.