Volkswagen Polo 1.6 Intake Manifold Description:

The intake manifold of the Volkswagen Polo 1.6 (engine code CFNA / CLRA) is a component designed to evenly distribute air to each cylinder for efficient combustion. It is typically made of durable plastic composite material (nylon-reinforced) to reduce weight and improve airflow smoothness.

Key Features:

• Material: High-strength plastic (composite)
• Design: Multi-port manifold with integrated intake runner flaps for better air control
• Function:
  
• Directs air from the throttle body into the engine’s cylinders.
• Maintains balanced air-fuel mixture across all cylinders.
• Enhances engine torque and efficiency, especially at low and mid RPM.
• 
  
• Components Integrated:
  
• MAP sensor port (for manifold absolute pressure sensing)
• PCV (positive crankcase ventilation) hose connections
• Mounting flange for throttle body
• Vacuum ports for brake booster and other controls
• 
  

Location:

Mounted on the top side of the engine, between the throttle body and the cylinder head.

Common Issues:

• Cracks or air leaks at joints causing rough idling.
• Carbon build-up inside runners reducing airflow.
• Faulty runner flap actuators (if equipped) causing performance loss or check engine light.

Would you like me to describe the sensor and actuator connections on this manifold as well (for example, where the MAP sensor and vacuum lines attach)?