Compatible with Passat 1994 1995 1996 1997 For Polo 2000 2001 2002 2003 2004 2005 Function: Save and reduce costs. This valve optimizes idle air intake, promoting efficient combustion and reducing consumption. Installation: Plug-and-play installation requires no modification. Function: The main function of a car's idle speed control valve is to regulate the amount of air entering the engine to control the idle speed, ensuring engine stability and reliability. Function: This engine idle speed control valve features a fast response time, quickly adapting to changes in engine speed and load conditions, ensuring stable engine performance, and enhancing driving comfort and vehicle stability., Manufacturer: yangfanqihang