{"product_id":"dorman-911-979-secondary-air-injection-check-valve","title":"Dorman 911-979 Secondary Air Injection Check Valve","description":"\u003ch2\u003eOverview of Dorman Secondary Air Injection Check Valve\u003c\/h2\u003e\u003cp\u003eThe Dorman 911-979 Secondary Air Injection Check Valve is engineered for reliable emission control in select BMW models. Designed with durable cast aluminum and a reed valve mechanism, this component supports efficient air injection system operation under varying conditions.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from cast aluminum for strength and corrosion resistance\u003c\/li\u003e\n\u003cli\u003eGray finish complements OEM appearance\u003c\/li\u003e\n\u003cli\u003eInlet and outlet size of 0.83 inches for precise fitment\u003c\/li\u003e\n\u003cli\u003eMaximum pressure rating of 50 psi to handle system demands\u003c\/li\u003e\n\u003cli\u003eReed valve type ensures proper airflow direction\u003c\/li\u003e\n\u003cli\u003eOperates effectively within a temperature range of -40°C to 125°C\u003c\/li\u003e\n\u003cli\u003eIncludes one secondary air injection control valve and one gasket for installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman 911-979 secondary air injection check valve is specifically designed for BMW vehicles including the 325Ci, 325i, 325xi, 330Ci, 330i, 330xi, and X3 models. Its cast aluminum construction provides durability and resistance to heat and corrosion, essential for maintaining emission control system integrity. The reed valve design allows for one-way airflow, preventing exhaust gases from flowing back into the air injection system. Both the inlet and outlet ports measure 0.83 inches, ensuring compatibility with factory air injection hoses. Rated for pressures up to 50 psi, this valve performs reliably under typical operating conditions. The included gasket facilitates a secure, leak-free installation.\u003c\/p\u003e\u003ch2\u003eApplications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePrevents exhaust gas backflow that can damage the air injection system\u003c\/li\u003e\n\u003cli\u003eHelps maintain proper secondary air injection for emission control compliance\u003c\/li\u003e\n\u003cli\u003eAddresses check valve failure symptoms such as rough idle or failed emissions tests\u003c\/li\u003e\n\u003cli\u003eReduces risk of air injection system leaks and related engine performance issues\u003c\/li\u003e\n\u003cli\u003eSupports consistent operation in cold and hot temperature extremes\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dorman 911-979 check valve on compatible BMW 325Ci, 325i, 325xi, 330Ci, 330i, 330xi, and X3 models, ensure the gasket is properly seated to prevent leaks. Verify that the valve orientation matches airflow direction as indicated by the reed valve design. Inspect connecting hoses for wear or damage and replace if necessary to maintain system integrity. Installation should be performed with the engine cool and following manufacturer torque specifications.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures this secondary air injection check valve to meet or exceed OEM standards for fit, form, and function. The cast aluminum material and reed valve design contribute to long service life under normal operating conditions. This part is backed by Dorman's limited warranty, providing coverage against defects in material and workmanship for a specified period. Refer to Dorman's warranty documentation for complete details.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":44329679945909,"sku":"BKKY-911-979","price":122.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_911979_Ang.jpg?v=1775012159","url":"https:\/\/www.partcatalog.com\/products\/dorman-911-979-secondary-air-injection-check-valve","provider":"PartCatalog","version":"1.0","type":"link"}