06AA13135A Secondary Air Injection Pump Check Valve for AUDI A8 2005-2009 06A131351E 06A131351A

• 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: 06A131351E/06A131351A/06AA13135A/06AA13135E/07C131101G/07C131101L/07C131110G/07CC13110L Compatible Vehicles:   For  AUDI A8 2005-2009   FAQ: Q1:Are you a Manufacture Factory? Yes,We have stable quality, stable supply, and on-time delivery Q1: Can…