{"product_id":"rein-ept0242-engine-coolant-reservoir-radiator","title":"Rein EPT0242 Engine Coolant Reservoir - Radiator","description":"\u003ch2\u003eOE-Style Coolant Reservoir for BMW\u003c\/h2\u003e\u003cp\u003eThe Rein EPT0242 engine coolant reservoir is an OE-quality expansion tank built for BMW cooling systems that require a radiator-mounted reservoir without a cap. It is molded from virgin plastic to help resist cracking from repeated heat cycles and to support long service life in daily driving conditions.\u003c\/p\u003e\u003cp\u003eCompatible with BMW 530i, 540i, 740i, 745e, 840i, and related xDrive and Gran Coupe applications, this reservoir is designed to match the original fit and function of the factory part.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEngine coolant reservoir \/ expansion tank for radiator-mounted applications\u003c\/li\u003e\n\u003cli\u003eVirgin plastic construction for improved durability versus regrind material\u003c\/li\u003e\n\u003cli\u003eBlack plastic housing\u003c\/li\u003e\n\u003cli\u003eTwist-on cap design; cap not included\u003c\/li\u003e\n\u003cli\u003eMounting brackets included for installation support\u003c\/li\u003e\n\u003cli\u003eOE-quality replacement from Rein Automotive\u003c\/li\u003e\n\u003cli\u003ePart number: EPT0242\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eRein EPT0242 is a direct-fit coolant expansion tank for BMW cooling systems that use a radiator-mounted reservoir without a cap. Rein builds this part to follow OE fitment and material standards, using virgin plastic to help reduce the risk of heat-cycle cracking and premature failure. The black plastic tank and included mounting brackets support a clean factory-style installation on the listed BMW 5 Series, 6 Series, 7 Series, and 8 Series applications. If you are replacing a leaking or brittle reservoir, EPT0242 provides a practical OE-style solution for restoring proper coolant storage and system operation.\u003c\/p\u003e\u003cp\u003eThis part cross-references BMW 17139846642 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat This Part Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eCoolant leaks from a cracked or aging expansion tank\u003c\/li\u003e\n\u003cli\u003eVisible plastic deterioration from heat cycling\u003c\/li\u003e\n\u003cli\u003eLow coolant warnings caused by reservoir failure\u003c\/li\u003e\n\u003cli\u003eLoss of coolant storage capacity in the radiator cooling circuit\u003c\/li\u003e\n\u003cli\u003eFactory reservoir replacement on BMW models with no cap included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify the vehicle uses a radiator-position coolant reservoir with no cap before ordering. Transfer or source the correct cap separately, since this reservoir is sold without a cap. Inspect hoses, seals, and adjacent cooling components during replacement, and confirm all connections are clean and properly seated before refilling and bleeding the cooling system.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eRein Automotive manufactures OE-quality expansion tanks to match or exceed the materials used in the original design. The use of virgin plastic is intended to improve durability and help the reservoir maintain reliable performance over time.\u003c\/p\u003e\u003ch2\u003eCompatible With BMW Models\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFits 2020-2026 BMW 840i, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2020-2026 BMW 840i Gran Coupe, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2020-2026 BMW 840i xDrive, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2020-2026 BMW 840i xDrive Gran Coupe, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2018-2023 BMW 530e, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2018-2023 BMW 530e xDrive, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2017-2023 BMW 530i, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2017-2023 BMW 530i xDrive, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2017-2023 BMW 540i, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2017-2023 BMW 540i xDrive, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2016-2022 BMW 740i, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2017-2022 BMW 740i xDrive, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2020-2022 BMW 745e, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2020-2022 BMW 745e xDrive, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2020-2022 BMW 745Le xDrive, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2018-2019 BMW 640i xDrive Gran Turismo, radiator, w\/o Cap\u003c\/li\u003e\n\u003cli\u003eFits 2017-2019 BMW 740e xDrive, radiator, w\/o Cap\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rein","offers":[{"title":"Default Title","offer_id":52431287124149,"sku":"DFBS-EPT0242","price":110.14,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/C8_EPT0242_Fro.jpg?v=1777851423","url":"https:\/\/www.partcatalog.com\/products\/rein-ept0242-engine-coolant-reservoir-radiator","provider":"PartCatalog","version":"1.0","type":"link"}