OE 06F129101N Oil-Water Separator Crankcase Ventilation Valve with Direct Bolt-On Installation and Pressure and Leak Tested Performance for Audi A3 A4 A6 TT Golf 2.0 TFSI

This Engine Crankcase Oil-Water Separator Assembly with OE number 06F129101N is a core crankcase ventilation component designed for Audi A3, A4, A6, TT and Volkswagen Golf 2.0 TFSI engines. It separates oil mist from blow-by gas inside the crankcase, returns collected oil back to the engine sump, and guides purified gas into the intake manifold for secondary combustion. A defective separator usually causes excessive oil consumption, blue exhaust smoke, rough idle, whistling noise and carbon buildup on intake parts.

Constructed with high-temperature resistant reinforced plastic housing and precision internal separation structure, it maintains stable working performance under repeated heat cycles and pressure changes. Produced strictly according to OE dimensions, it guarantees perfect matching and direct bolt-on installation without extra modification. Every assembly undergoes strict pressure and leak testing before shipment. It is a reliable aftermarket replacement widely stocked by auto repair shops and auto parts wholesalers.