Auto Engine Valvetronic New Actuator Motor for BMW N20 N55 X1 X5 X6 F30 Cylinder Motor 11377603979 11377599021

• How does a check valve work? A car's check valve is like a "one-way switch": When fluid (air/exhaust gas) flows forward, the pressure pushes open the internal valve flap/reed, letting the fluid pass through smoothly. Once the fluid tries to flow in reverse, the reverse pressure shoves the valve flap back to its sealing position, and the valve closes automatically to block the backflow — this prevents equipment damage, pressure surges, or exhaust gas abnormalities. Features  •   Automatic on-off, One-way conduction ,High adaptability Benefits  •   Reduce the risk of damage to pipelines/engine components •   No complex electrical control components and low failure rate •   Aid in optimizing engine exhaust/intake efficiency  • O.E.M Replace:  11377603979 11377599021 Compatible Vehicles:

Air Conditioner Blower Fan Secondary Air Injection Pump Check Valve Valvetronic Actuator Motor Secondary Air Injection Pump