{"product_id":"bmw-heater-hose-3","title":"Original BMW Return Line Coolant Hose for B58 G01 X3 M40i and G02 X4 M40i (2018–2019)","description":"\u003cp\u003eBuilt for the B58-powered G01 BMW X3 M40i (2018–2019) and G02 X4 M40i (2019), this Original BMW coolant return hose is part of the heater circuit that carries engine coolant to and from the heater core. BMW names it \"coolant hose, return,\" and it appears as item 2 on the heater hose diagram for these models. BMW shows production of this number beginning in August 2017. It is sold as a single hose.\u003c\/p\u003e\u003cp\u003eOriginal BMW Parts carry a 24-month parts warranty.\u003c\/p\u003e\u003cp\u003eHeater hoses route hot coolant from the engine to the heater core behind the dashboard. The blower motor then pushes cabin air through the core to warm it. Because these hoses are also part of the engine cooling system, a leak here lowers the coolant level and can lead to overheating, along with weak or missing cabin heat. The return hose brings coolant back from the heater core. Make sure you have the return line and not the feed line before you order.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: BMW (Original BMW part)\u003c\/li\u003e\n\u003cli\u003ePart number: 64-21-9-354-464\u003c\/li\u003e\n\u003cli\u003eBMW part name: Coolant hose, return\u003c\/li\u003e\n\u003cli\u003eDiagram position: item 2, heater hoses\u003c\/li\u003e\n\u003cli\u003eEngine: B58\u003c\/li\u003e\n\u003cli\u003eProduction start: August 2017\u003c\/li\u003e\n\u003cli\u003eSold as: one hose\u003c\/li\u003e\n\u003cli\u003eWarranty: 24 months\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat are the signs of a failing heater hose?\u003c\/strong\u003e\u003cbr\u003eLook for cracks, a soft or deteriorated hose, leaks at the connections near the firewall, a falling coolant level, a coolant smell under the hood or inside the cabin, or a heater that gives no warmth.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes this hose fit the X3 xDrive30i?\u003c\/strong\u003e\u003cbr\u003eNo. BMW lists it only for the M40i in the X3 and X4.\u003c\/p\u003e\u003cp\u003eFitting the correct return line restores both cabin heat and cooling system integrity on your M40i.\u003c\/p\u003e\n\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eUse the table below to verify the year and submodel for your build. PMB Performance has spent over 20 years matching parts to vehicles and can verify this against your VIN.\u003c\/p\u003e\u003ctable border=\"1\"\u003e\n\u003ctr\u003e\n\u003cth align=\"left\" width=\"100\"\u003eYear\u003c\/th\u003e\n\u003cth align=\"left\" width=\"125\"\u003eMake\u003c\/th\u003e\n\u003cth align=\"left\" width=\"150\"\u003eModel\u003c\/th\u003e\n\u003cth align=\"left\" width=\"80\"\u003eSubmodel\u003c\/th\u003e\n\u003cth align=\"left\"\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2018\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX3\u003c\/td\u003e\n\u003ctd\u003eM40i\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX3\u003c\/td\u003e\n\u003ctd\u003eM40i\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2019\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eX4\u003c\/td\u003e\n\u003ctd\u003eM40i\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"SSF E","offers":[{"title":"Default Title","offer_id":47779862675634,"sku":"BSMS_64-21-9-354-464","price":71.95,"currency_code":"USD","in_stock":true}],"url":"https:\/\/pmbperformance.com\/products\/bmw-heater-hose-3","provider":"PMB Performance","version":"1.0","type":"link"}