N5KD 6420101891 A6420101891 A6420100891 Oil Separator Breather Valves For W164 W203 W204. Part number: 6420101891 A6420101891 A6420100891 A6420102091 A6420102191 A6420100191 A6420100391 A6420100591 A6420100691 Engineered with high temperature resistant plastic and rubber for superior corrosion resistance, featuring tool installation to simplifying DIY maintenance while ensuring performances under extreme conditions. Constructed with high-strength plastic, this Oil Separator Segregator is resistant to corrosion, abrasion, extreme heat, and rust, delivering consistent quality and excellent operational performance. The cylinder oil separator breather valve functions as a fuel pre-processing device, efficiently removing water and foreign particles from fuel and protecting the fuel system and engine components from corrosion and wear induced by these contaminants., Manufacturer: KVSWBRE