{"product_id":"bmw-thermostat-o-ring-1","title":"Original BMW Thermostat Housing O-Ring 45x3.5 mm for BMW M240i, 340i, 440i, 540i, and 740i (2016–2021)","description":"\u003cp\u003eSized at 45 x 3.5 mm, Original BMW gasket ring 11-53-8-658-572 is the O-ring that seals the thermostat to the water pump on the B58 six-cylinder in the BMW M240i, 340i, 440i, 540i, and 740i. O-rings like this sit in a groove and compress between two parts, holding coolant in under pressure and heat. BMW requires this O-ring to be replaced whenever the thermostat or the water pump is replaced, because it is a one-time-use seal. A failed ring here is a common point for coolant leaks. It weighs 2 g, is made in Italy, and is sold individually.\u003c\/p\u003e\u003cp\u003eThe 24-month Original BMW Parts warranty covers this O-ring.\u003c\/p\u003e\u003cp\u003eBMW calls this part a gasket ring and has produced it since July 2015, which places it with the B58 engine generation. BMW's parts data shows the same ring on the F22 M240i, the F30 340i and F34 340i Gran Turismo, the F32 and F36 440i, the G30 540i, and the G11 and G12 740i, so a single part number covers every B58 car in the store fitment.\u003c\/p\u003e\u003ch3\u003eTechnical Details\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eManufacturer: BMW, genuine part\u003c\/li\u003e\n\u003cli\u003ePart number: 11-53-8-658-572\u003c\/li\u003e\n\u003cli\u003eBMW part name: Gasket ring\u003c\/li\u003e\n\u003cli\u003eSize: 45 x 3.5 mm\u003c\/li\u003e\n\u003cli\u003eWeight: 2 g (0.07 oz)\u003c\/li\u003e\n\u003cli\u003ePosition: thermostat to water pump\u003c\/li\u003e\n\u003cli\u003eIn BMW production since July 2015\u003c\/li\u003e\n\u003cli\u003eMade in Italy, sold each\u003c\/li\u003e\n\u003cli\u003eWarranty: 24 months\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eCan I reuse the old O-ring?\u003c\/strong\u003e\u003cbr\u003eNo. BMW specifies a new ring each time the thermostat or water pump is replaced.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat size is it?\u003c\/strong\u003e\u003cbr\u003eThe ring measures 45 x 3.5 mm.\u003c\/p\u003e\u003cp\u003eOrder the seal with your B58 cooling parts from PMB.\u003c\/p\u003e\n\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cp\u003eUse the fitment table below to confirm year, model, submodel, and application notes before ordering. With over 20 years of parts and fitment experience, PMB Performance can match this to 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\u003e2016–2018\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e340i\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2019\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e340i GT xDrive\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016–2018\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e340i xDrive\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2020\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e440i\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2020\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e440i Gran Coupe\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2020\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e440i xDrive\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2020\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e440i xDrive Gran Coupe\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2019\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e540i\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2019\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e540i xDrive\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016–2019\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e740i\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2019\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003e740i xDrive\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2021\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM240i\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2017–2021\u003c\/td\u003e\n\u003ctd\u003eBMW\u003c\/td\u003e\n\u003ctd\u003eM240i xDrive\u003c\/td\u003e\n\u003ctd\u003e\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":47779884957874,"sku":"BSMS_11-53-8-658-572","price":7.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0521\/8792\/2610\/files\/0B622553-EF7E-4DD9-9042-988B8E92D4E8-2.jpg?v=1785474216","url":"https:\/\/pmbperformance.com\/products\/bmw-thermostat-o-ring-1","provider":"PMB Performance","version":"1.0","type":"link"}