Features   |   Identification   |   Component Locations   |   How it Works Not being able to find things in the engine bay of your car can make the repair process a baffling ordeal. Audi didn't help this any when they decided to cover everything in plastic. To alleviate this problem, I've collected some illustrations of the engine and engine bay, as well as some other helpful illustrations like belt routings. Before we get to the pictures, I want to point out that this is not meant to replace repair procedures, it's not meant to be an exhaustive reference, and it may not be 100% accurate. Each model had a slightly different engine bay; some differences are small enough to ignore, but others are not. If you see something in an illustration that looks radically different than your engine bay, do not fret -- that's perfectly normal. Engine cooling system diagram Engine lubrication system diagram Front view of engine Rear view of engine Timing belt and water pump Serpentine belt routing options Dual-path intake manifold and components Intake manifold upper section Intake manifold changeover vacuum solenoid Throttle body EGR valve Intake manifold lower section Mount for Idle Air Control valve Idle Air Control valve (aka Idle Stabilizer Valve) [N71]

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