{"product_id":"rein-chu1648-engine-coolant-hose-flange-kit","title":"Rein CHU1648 Engine Coolant Hose Flange Kit","description":"\u003ch2\u003eEngine Coolant Hose Flange Kit for Audi A4\u003c\/h2\u003e\u003cp\u003eRein CHU1648 is an upgraded aluminum engine coolant hose flange kit for 2005-2009 Audi A4 and 2005-2009 Audi A4 Quattro models with a metal connector. It replaces cracked or leaking coolant junction flanges with direct-fit components built for a cleaner, more complete repair.\u003c\/p\u003e\u003cp\u003eUse this kit when servicing the cooling system on an Audi A4 or Audi A4 Quattro and you want a replacement that addresses the flange, thermostat, temperature sensor, hose connections, and sealing points in one application-specific solution.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eUpgraded aluminum coolant flange construction for improved durability over plastic OE-style flanges\u003c\/li\u003e\n\u003cli\u003eDirect-fit replacement kit for 2005-2009 Audi A4 and Audi A4 Quattro, w\/Metal Connector\u003c\/li\u003e\n\u003cli\u003eIncludes premium rubber hose components with factory-style quick-connect fittings\u003c\/li\u003e\n\u003cli\u003eAddresses the coolant junction flange, thermostat, temperature sensor, and related seals\u003c\/li\u003e\n\u003cli\u003eRein CHU1648 is built for a complete cooling system repair on the listed applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003ePlastic coolant flanges can warp and crack after repeated heat cycling, leading to coolant loss and unstable engine temperatures. Rein CHU1648 replaces the original coolant flange assembly with an aluminum upgrade and matching service components to restore the coolant junction on the cylinder head. This part cross-references Genuine 06D121132C for the same application.\u003c\/p\u003e\u003cp\u003eFor Audi A4 and Audi A4 Quattro owners, Rein CHU1648 provides a direct-fit repair path that helps reduce repeat teardown work. The kit is intended for vehicles with a metal connector and is a practical choice when the original flange, hose connections, or sealing surfaces show age-related deterioration.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Fix\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCoolant leaks at the cylinder head flange\u003c\/li\u003e\n\u003cli\u003eCracked or warped plastic coolant junction housings\u003c\/li\u003e\n\u003cli\u003eSwollen or deteriorated hose connection points\u003c\/li\u003e\n\u003cli\u003eTemperature control issues caused by failing cooling system seals\u003c\/li\u003e\n\u003cli\u003eRepeat repairs from worn coolant flange components on Audi A4 and Audi A4 Quattro models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eConfirm vehicle fitment by year, model, and the metal connector configuration before installation. Replace any compromised cooling components during service, and perform a full coolant flush with a quality coolant such as Pentosin Pentofrost after the repair. Rein CHU1648 does not include mounting hardware.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eRein builds this kit with direct-fit components and an aluminum flange upgrade to support long-term cooling system service on the listed Audi applications. The design focuses on replacing the common failure points involved in coolant flange service for a more complete repair.\u003c\/p\u003e","brand":"Rein","offers":[{"title":"Default Title","offer_id":52918198370485,"sku":"DFBS-CHU1648","price":180.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/C8_CHU1648_FRO.jpg?v=1785567019","url":"https:\/\/www.partcatalog.com\/products\/rein-chu1648-engine-coolant-hose-flange-kit","provider":"PartCatalog","version":"1.0","type":"link"}