{"product_id":"standard-ignition-vs139-secondary-air-injection-pump-check-valve","title":"Standard Ignition VS139 Secondary Air Injection Pump Check Valve","description":"\u003ch2\u003eSecondary Air Injection Check Valve for Audi and Volkswagen\u003c\/h2\u003e\u003cp\u003eStandard Ignition VS139 is a secondary air injection pump check valve used in emission control systems on select Audi and Volkswagen vehicles. It helps control airflow in the air injection system with a round and oval connector shape, a 5\/16 in. (8 mm) hose size, and a male terminal type.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSecondary air injection pump check valve for emission control service\u003c\/li\u003e\n\u003cli\u003eConnector shape: round and oval\u003c\/li\u003e\n\u003cli\u003eHose size: 5\/16 in. \/ 8 mm\u003c\/li\u003e\n\u003cli\u003eTerminal type: male\u003c\/li\u003e\n\u003cli\u003eContents: valve\u003c\/li\u003e\n\u003cli\u003eStandard Ignition VS139 replacement part\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eStandard Ignition VS139 is built for secondary air injection system service on Audi A4, Audi A4 Quattro, Audi A5, Audi A5 Quattro, Audi A6, Audi A6 Quattro, Audi A8 Quattro, Audi Q5, Audi S3, Audi S4, Audi S5, Audi S6, Audi S8, Audi TT, Audi TT Quattro, Volkswagen Beetle, and Volkswagen Passat applications listed in the fitment data. This check valve is used in the air injection system to manage flow through the pump circuit and support proper emission control operation. This part cross-references 2-31319 and 058905291 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eSecondary air injection fault codes\u003c\/li\u003e\n\u003cli\u003eRestricted or incorrect airflow in the air injection circuit\u003c\/li\u003e\n\u003cli\u003eEmission system performance issues\u003c\/li\u003e\n\u003cli\u003eCheck valve leakage in the pump line\u003c\/li\u003e\n\u003cli\u003eDriveability concerns related to air injection system malfunction\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVerify hose size and connector shape before installation.\u003c\/li\u003e\n\u003cli\u003eConfirm the male terminal style matches the vehicle harness connection.\u003c\/li\u003e\n\u003cli\u003eInspect adjoining hoses and fittings for wear, cracking, or carbon buildup during service.\u003c\/li\u003e\n\u003cli\u003eUse the vehicle year and model listing to confirm application before ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eStandard Ignition is a recognized aftermarket brand for electrical and emission-related replacement parts. VS139 is engineered as a direct replacement style component for the listed Audi and Volkswagen applications.\u003c\/p\u003e","brand":"Standard Ignition","offers":[{"title":"Default Title","offer_id":44720975937717,"sku":"FBHK-VS139","price":22.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/SI_VS139_Fro.jpg?v=1775095934","url":"https:\/\/www.partcatalog.com\/products\/standard-ignition-vs139-secondary-air-injection-pump-check-valve","provider":"PartCatalog","version":"1.0","type":"link"}