{"product_id":"front-crankshaft-oil-seal-bmw-b46-b48-b58-engines","title":"Front Main Crankshaft Oil Seal B48 B58 – BMW 1, 2, 3, 4, 5 Series \u0026 X Series \u0026 MINI (14-25+)","description":"\u003cp data-path-to-node=\"1\"\u003eThe \u003cb data-path-to-node=\"1\" data-index-in-node=\"44\"\u003eFront Main Crankshaft Seal is\u003c\/b\u003e a critical engine component for BMW’s modular B46 and B48 2.0L 4-cylinder turbocharged engines. Located at the front of the engine where the crankshaft exits to meet the transmission, this seal is responsible for keeping engine oil contained within the crankcase while allowing the crankshaft to rotate freely. It is a high-performance PTFE (Teflon) or fluoroelastomer seal designed to withstand high rotational speeds and the thermal stresses of modern turbocharged operation.\u003c\/p\u003e\n\u003cp data-path-to-node=\"2\"\u003eOn the B48 platform, the front main seal is a labor-intensive maintenance item. Because it is positioned behind the flywheel or drive plate, the transmission must be removed to access it. Common symptoms of failure include a \u003cb data-path-to-node=\"2\" data-index-in-node=\"224\"\u003epersistent oil leak\u003c\/b\u003e appearing at the junction between the engine and the gearbox, or oil spotting on the ground near the center front of the vehicle. If a leak becomes severe, oil can contaminate the transmission bell housing or cause clutch slipping in manual transmission models. Due to the high labor cost of reaching this seal, it is standard practice to replace it whenever the transmission is removed for other services, such as a front main coolant flange replacement or a torque converter swap.\u003c\/p\u003e\n\u003cp data-path-to-node=\"3\"\u003e\u003cb data-path-to-node=\"3\" data-index-in-node=\"0\"\u003eVehicle Compatibility:\u003c\/b\u003e This seal is designed for the \u003cb data-path-to-node=\"3\" data-index-in-node=\"53\"\u003eB46 \/ B48 2.0L 4-Cylinder Turbo\u003c\/b\u003e engine:\u003c\/p\u003e\n\u003cul data-path-to-node=\"4\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,0\"\u003e\u003cb data-path-to-node=\"4,0,0\" data-index-in-node=\"0\"\u003e3 Series (F30 \/ F31 \/ G20 \/ G21):\u003c\/b\u003e 2016–Present (320i, 330i, 330e)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,0\"\u003e\u003cb data-path-to-node=\"4,1,0\" data-index-in-node=\"0\"\u003e4 Series (F32 \/ F33 \/ F36 \/ G22 \/ G23):\u003c\/b\u003e 2017–Present (420i, 430i)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,0\"\u003e\u003cb data-path-to-node=\"4,2,0\" data-index-in-node=\"0\"\u003e5 Series (G30 \/ G31):\u003c\/b\u003e 2017–2023 (520i, 530i, 530e)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,3,0\"\u003e\u003cb data-path-to-node=\"4,3,0\" data-index-in-node=\"0\"\u003e1 Series (F20 \/ F21 \/ F40) \u0026amp; 2 Series (F22 \/ G42):\u003c\/b\u003e 2016–Present (120i, 125i, 220i, 230i)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,4,0\"\u003e\u003cb data-path-to-node=\"4,4,0\" data-index-in-node=\"0\"\u003eX1 (F48) \/ X2 (F39) \/ X3 (G01) \/ X4 (G02):\u003c\/b\u003e 2016–Present (20i, 30i)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,5,0\"\u003e\u003cb data-path-to-node=\"4,5,0\" data-index-in-node=\"0\"\u003eMINI Cooper S \/ JCW (F54 \/ F55 \/ F56 \/ F57 \/ F60):\u003c\/b\u003e 2014–Present\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"5\"\u003e\u003cb data-path-to-node=\"5\" data-index-in-node=\"0\"\u003eSpecifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"6\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,1,0\"\u003e\u003cb data-path-to-node=\"6,1,0\" data-index-in-node=\"0\"\u003eEngine Application:\u003c\/b\u003e B46 \/ B48 \/ B48A20 \/ B48B20\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,2,0\"\u003e\u003cb data-path-to-node=\"6,2,0\" data-index-in-node=\"0\"\u003eSeal Type:\u003c\/b\u003e PTFE (Polytetrafluoroethylene)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"6,3,0\"\u003e\u003cb data-path-to-node=\"6,3,0\" data-index-in-node=\"0\"\u003ePosition:\u003c\/b\u003e Engine Front (Crankshaft to Transmission)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MYTY Auto Parts","offers":[{"title":"Default Title","offer_id":48198318620911,"sku":"11118604931","price":395.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0769\/7183\/5631\/files\/2020-G20-330i-B48-Front-Crank-Seal.png?v=1774499602","url":"https:\/\/myty.co.za\/products\/front-crankshaft-oil-seal-bmw-b46-b48-b58-engines","provider":"MYTY Auto Parts","version":"1.0","type":"link"}