{"product_id":"dorman-603-831-engine-coolant-reservoir-front","title":"Dorman 603-831 Engine Coolant Reservoir - Front","description":"\u003ch2\u003eEngine Coolant Reservoir for BMW 528i\u003c\/h2\u003e\u003cp\u003eThis Dorman engine coolant reservoir is a direct replacement for the factory tank on the 2011 BMW 528i, front. Built from plastic to handle underhood heat and engine vibration, it is engineered to match the original fit and function. Part number 603-831 includes the reservoir and cap, along with an integrated level sensor.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement engine coolant reservoir for the 2011 BMW 528i, front\u003c\/li\u003e\n\u003cli\u003ePlastic construction with black finish\u003c\/li\u003e\n\u003cli\u003ePressurized design with 20 psi cap rating\u003c\/li\u003e\n\u003cli\u003eSpring-loaded twist cap included\u003c\/li\u003e\n\u003cli\u003eLevel sensor included\u003c\/li\u003e\n\u003cli\u003e1.5 L capacity\u003c\/li\u003e\n\u003cli\u003eSix mounting holes; irregular shape\u003c\/li\u003e\n\u003cli\u003ePackage contents: 1 coolant reservoir and 1 cap\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eDorman 603-831 is engineered for the BMW 528i cooling system and built to replicate the original reservoir’s fit and function. The pressurized tank uses a spring-loaded twist cap rated to 20 psi and includes a level sensor for factory-style monitoring. With a 1.5 L capacity and six mounting points, this reservoir is made to install in the front position on the 2011 BMW 528i. This part cross-references BMW OE number 17117639021 for the same application.\u003c\/p\u003e\u003ch2\u003eCommon Cooling System Issues\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCracked or leaking coolant reservoir\u003c\/li\u003e\n\u003cli\u003eLow coolant level warnings from a failed tank or sensor\u003c\/li\u003e\n\u003cli\u003ePressure loss from a worn cap or damaged reservoir neck\u003c\/li\u003e\n\u003cli\u003eHeat-related plastic fatigue in the original expansion tank\u003c\/li\u003e\n\u003cli\u003eCoolant odor or visible seepage around the reservoir area\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eFits 2011 BMW 528i, front. Confirm the reservoir shape, mounting hole count, cap style, and sensor connection before installation. Transfer or connect the level sensor as required by the vehicle configuration, and inspect hoses, clamps, and the cap sealing surface during replacement. Properly bleed the cooling system after installation to help restore normal operation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman manufactures this replacement coolant reservoir from quality materials and designs it to match original part fit and function for the BMW 528i application. Part number 603-831 is built for use in the engine cooling system where heat and vibration resistance matter.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52401888166069,"sku":"BKKY-603-831","price":103.75,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_603831_Fro.jpg?v=1777760741","url":"https:\/\/www.partcatalog.com\/products\/dorman-603-831-engine-coolant-reservoir-front","provider":"PartCatalog","version":"1.0","type":"link"}