{"product_id":"standard-ignition-av78-secondary-air-injection-pump-check-valve","title":"Standard Ignition AV78 Secondary Air Injection Pump Check Valve","description":"\u003ch2\u003eSecondary Air Injection Check Valve for Mercedes-Benz\u003c\/h2\u003e\u003cp\u003eStandard Ignition AV78 is an O.E. Exact secondary air injection pump check valve with a 22 mm hose size. It is built for direct replacement use on select Mercedes-Benz air cleaner check valve applications, including C300, E350, ML350, and GL450 models.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eO.E. Exact grade type for factory-style fit and function\u003c\/li\u003e\n\u003cli\u003e22 mm hose size for the specified air injection connection\u003c\/li\u003e\n\u003cli\u003eSecondary air injection pump check valve design\u003c\/li\u003e\n\u003cli\u003eDirect replacement for select Mercedes-Benz air cleaner check valve applications\u003c\/li\u003e\n\u003cli\u003eStandard Ignition AV78 part number for catalog matching\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eStandard Ignition AV78 is a secondary air injection pump check valve used in emission control systems on select Mercedes-Benz vehicles. This valve helps control airflow in the air injection circuit, supporting proper system operation during cold-start emissions management. It is listed as an O.E. Exact replacement and uses a 22 mm hose size, making it a practical match for vehicles such as the Mercedes-Benz C300, E350, and ML350. The AV78 cross-references Genuine 0021407460 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSecondary air injection fault codes related to check valve performance\u003c\/li\u003e\n\u003cli\u003eAir leakage in the air cleaner or air injection circuit\u003c\/li\u003e\n\u003cli\u003eEmissions system warnings on Mercedes-Benz C300, E350, and GL450 applications\u003c\/li\u003e\n\u003cli\u003eCold-start air injection flow issues caused by a worn or sticking valve\u003c\/li\u003e\n\u003cli\u003eReplacement needs for an OE-style Mercedes-Benz air injection check valve\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Fitment\u003c\/h2\u003e\u003cp\u003eCompatible With select Mercedes-Benz air cleaner check valve applications. Fits 2008-2012 Mercedes-Benz C300, N\/A; Fits 2006-2012 Mercedes-Benz C350, N\/A; Fits 2006-2011 Mercedes-Benz E350, N\/A; Fits 2007-2012 Mercedes-Benz GL450, N\/A; Fits 2006-2011 Mercedes-Benz ML350, N\/A; Fits 2007-2011 Mercedes-Benz S550, N\/A; Fits 2005-2011 Mercedes-Benz SLK350, N\/A; Fits 2006-2007 Mercedes-Benz C230, N\/A; Fits 2006-2007 Mercedes-Benz C280, N\/A; Fits 2006 Mercedes-Benz C55 AMG, N\/A; Fits 2006 Mercedes-Benz CLK500, N\/A; Fits 2006 Mercedes-Benz CLK55 AMG, N\/A; Fits 2006 Mercedes-Benz E55 AMG, N\/A. Verify hose diameter and OE reference before installation. Professional installation is recommended for emission control components.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eStandard Ignition supplies OE-style replacement parts for emission control service, and AV78 is cataloged as an O.E. Exact component for the listed Mercedes-Benz applications.\u003c\/p\u003e","brand":"Standard Ignition","offers":[{"title":"Default Title","offer_id":52816435577013,"sku":"FBHK-AV78","price":222.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/SI_AV78_Fro.jpg?v=1784357192","url":"https:\/\/www.partcatalog.com\/products\/standard-ignition-av78-secondary-air-injection-pump-check-valve","provider":"PartCatalog","version":"1.0","type":"link"}