{"product_id":"pierburg-7-04389-00-0-secondary-air-injection-pump","title":"Pierburg 7.04389.00.0 Secondary Air Injection Pump","description":"\u003ch2\u003ePierburg Secondary Air Injection Pump for Mercedes-Benz\u003c\/h2\u003e\u003cp\u003ePierburg 7.04389.00.0 is a 12V electric secondary air injection pump built as a standard replacement for Mercedes-Benz emission control systems. It pushes fresh air into the exhaust during cold starts to help reduce emissions and support smooth engine operation.\u003c\/p\u003e\u003cp\u003eBrand Line: Genuine OE from HELLA indicates an OE-focused product line for drivers who want factory-style fit and function in emission control repairs.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e12V electric secondary air injection pump\u003c\/li\u003e\n\u003cli\u003eStandard replacement grade for emission control service\u003c\/li\u003e\n\u003cli\u003eHelps deliver fresh air to the exhaust on cold starts\u003c\/li\u003e\n\u003cli\u003eOE-level fitment focus for Mercedes-Benz applications\u003c\/li\u003e\n\u003cli\u003eTechnical Information Number: SI 1150-11\u003c\/li\u003e\n\u003cli\u003ePart number: 7.04389.00.0\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Pierburg secondary air injection pump is engineered for Mercedes-Benz vehicles that rely on an electric air injection system to reduce cold-start emissions. It is a direct-fit style replacement for many V8 and V6 models, including Mercedes-Benz G500, ML500, R500, CL500, CLK500, CLS500, E500, S430, S500, SL500, C240, C320, CLK320, E320, ML350, G55 AMG, SLK320, CLK430, ML320, ML55 AMG, CL55 AMG, CLK55 AMG, E430, E55 AMG, S55 AMG, ML430, C280, and C43 AMG.\u003c\/p\u003e\u003cp\u003eThis part cross-references Bosch 9605 for the same application. The part number 7.04389.00.0 is also listed with OE-style interchange references for select Mercedes-Benz air injection pump applications.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eReduced cold-start emissions from a failing secondary air system\u003c\/li\u003e\n\u003cli\u003eAir injection pump noise or electrical failure\u003c\/li\u003e\n\u003cli\u003eCheck engine light related to secondary air flow faults\u003c\/li\u003e\n\u003cli\u003eInsufficient fresh-air delivery into the exhaust during startup\u003c\/li\u003e\n\u003cli\u003eEmission inspection issues tied to air injection performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eConfirm 12V electric system requirements and match the OE number before ordering. Verify the vehicle’s secondary air injection plumbing, electrical connector, and mounting points during diagnosis, especially on Mercedes-Benz G500, ML500, and E500 applications where multiple emission-control components may be involved. Use the vehicle’s VIN and OE reference A0001403785 when checking fitment for the 7.04389.00.0 pump.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003ePierburg is supplied as Genuine OE from HELLA, with a focus on OE-level performance and factory-style replacement fitment for emission control repairs.\u003c\/p\u003e","brand":"Pierburg","offers":[{"title":"Default Title","offer_id":52417896349877,"sku":"BLGF-7.04389.00.0","price":692.47,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/HL_704389000_Fro.jpg?v=1777804487","url":"https:\/\/www.partcatalog.com\/products\/pierburg-7-04389-00-0-secondary-air-injection-pump","provider":"PartCatalog","version":"1.0","type":"link"}