{"product_id":"intercooler-coolant-expansion-tank","title":"Intercooler Coolant Expansion Tank","description":"The Genuine BMW 17138617045 is an intercooler coolant expansion tank designed for specific BMW models, including the 340i, 340i xDrive, 440i, M240i xDrive, and others. This \"overflow bottle\" is essential for turbocharged BMWs that employ a split coolant system. The low-temperature circuit cools auxiliary components like the turbocharger intercooler. As the coolant heats up during engine operation, especially under performance demands, it expands. This expansion tank provides a managed space for the increased coolant volume, and as the system cools, it ensures sufficient coolant is available.\n\nManufactured in Italy, this genuine BMW part is constructed from plastic, reflecting common material choices for engine coolant reservoirs. Failures in these reservoirs can manifest as foggy plastic, making coolant level difficult to read, or as leaks and cracking, often at seams or molded junctions, due to constant heat cycles and material aging. Symptoms of a failing reservoir include coolant leaks and potential engine overheating due to reduced cooling system pressure and a lowered boiling point.\n\nThis intercooler coolant expansion tank is specifically designed for various BMW 340i, 340i xDrive, 340i GT xDrive, 430i, 430i xDrive, and 440i models from 2016 through 2021, generally for the 3.0L and 2.0L B58 and B46\/B48 engines respectively. Fitment notes indicate specific applications like '3.0 LITER W\/O HYBRID, W\/O M3 2016-18, AUXILIARY, Aux reservoir' for the 340i series, and '2.0 LITER 2017-20, w\/M package' for the 430i models. Always verify fitment with your specific vehicle's details before purchase.","brand":"BMW","offers":[{"title":"Default Title","offer_id":52687172731192,"sku":"17138617045","price":122.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/660680447.jpg?v=1784881059","url":"https:\/\/store.motormia.co\/products\/intercooler-coolant-expansion-tank","provider":"MOTORMIA","version":"1.0","type":"link"}