Engine Crankcase Breather Hose – Oil Reservoir to Air Filter Housing SR0856X Complete Kit: Includes all necessary

Complete Kit: Includes all necessary wiring

professional installation recommended for proper fit

designed to measure the amount of air entering the engine for optimal fuel delivery

OEM cross-reference: Replaces Audi part 7L8121212A and Behr 376750341

Engine Crankcase Breather Hose – Oil Reservoir to Air Filter Housing SR0856X Complete Kit: Includes all necessaryEngine Crankcase Breather hoses are part of a vehicles Positive Crankcase Ventilation (PCV) system. The job of the PCV system is to allow pressure to escape from the crankcase in a controlled manner. It is necessary to vent the crankcase of positive pressure caused by engine blow by (gas from the combustion event that leaks past the pistons.) This blow by gas is routed back into the intake air stream thereby reducing the emission of unburned