Standard Ignition Secondary Air Injection Pump Check Valve P/N:AV64

Keep your cold-start emissions system flowing the right direction with the Standard Ignition Secondary Air Injection Pump Check Valve (MPN AV64). It installs as a direct-fit replacement for the listed applications: the 2003-2006 BMW 325CI, 2003-2005 BMW 325I, 2003-2005 BMW 325XI, 2003-2006 BMW 330CI, 2003-2005 BMW 330I, 2003-2005 BMW 330XI, and 2004-2006 BMW X3.

A secondary air injection check valve is a one-way valve in the secondary air system. It is designed to let air from the air injection pump pass through toward the exhaust stream during cold starts, while blocking hot exhaust gases and moisture from flowing back toward the pump.

• One-way flow: passes secondary air toward the exhaust and helps prevent backflow the other direction.
• Pump protection: intended to shield the air pump from hot exhaust gases when the valve is working as designed.
• Direct fit: built to replace the original check valve on the listed applications.

Signs this part may need replacing include a check-engine light with secondary-air-system trouble codes. If a failed check valve is the cause, this replaces it; diagnose the system before ordering.

Interchange: Manufacturer part number AV64.