Audi A4 B6 Common - Problems !!better!!

The B6 has a spaghetti maze of rubber hoses for the crankcase ventilation and turbo bypass. These hoses dry rot and collapse.

Radio/wipers/lights work but car won’t crank, or dies suddenly while driving. Cause: Internal electrical contacts burn out. Fix: Replace ignition switch (under steering column) – cheap and DIYable. audi a4 b6 common problems