BMW N54 Crank Hub by 5150 AutoSport

The BMW N54 Engine's Crank Hub is a critical component, linking the crankshaft, water pump, power steering pump, and alternator. OEM hub failure occurs as the crank hub separates from the crankshaft, spinning independently of the crankshaft. This failure is not only well-known among technicians and enthusiasts, but a catastrophic failure, causing severe engine damage.  The Problem OEM Failure is mainly due to the design of the crank hub assembly; the OEM crankshaft's splined end is press-fit into the crank hub. As the assembly ages and wears, the connection between the hub and crank weakens, leading to slippage or complete separation. As the crank hub separates from the crank, the timing chain loses its synchronization with the crankshaft and camshaft, causing piston-to-valve contact and severe internal engine damage.  The 5150 Solution Improved Materials: Our Upgraded Crank Hub is machined from 4340 Billet Steel to ensure strength and endurance, then heat treated to ensure longevity.  4-Pin Design: The 5150 Crank Hub uses a 4-pin attachment style, distributing load across (4) points rather than the OEM single point press-fit.  Included Crank Bolt: To further reduce the risk of slipping, spinning, or failure, our Crank Hub Upgrade includes a genuine BMW Crank Bolt, providing additional attachment reinforcement. Direct fitment for BMW part # 11211439395. 5150 1/2 Inch Drill Alignment Guide: For ultra-accurate and easy installation, each crank hub kit includes a drill alignment guide. Precision Machining: Ensuring precise fitment and alignment, the 5150 Upgraded Crank Hub is engineered and manufactured to tighter tolerances than OEM hubs. This also functions to maintain optimal engine timing and performance. Direct fitment and upgrade over BMW part # 11237570107. Power-Ready: 5150 Upgraded Crank Hubs are designed and manufactured with high performance, high boost applications. While they can be used as simply as a preventative OEM-replacement, they are also ready for the high heat and high stresses of high horsepower performance engine builds and aggressive driving applications.  BMW N54 Applications: 1 Series 2007-2010     E82/E88     135i2011-2012     E82     1M 3 Series 2006-2010     E90/E91/E92/E93     335i2011-2013     E92/E93     335is 5 Series 2008-2010     E60/E61     535i 7 Series 2009-2012     F01/F02     740i / 740Li X6 Series 2008-2010     E71     X6 xDrive35i Z4 Series 2009-2016     E89     Z4 sDrive35i2010-2016     E89     Z4 sDrive35is Alpina B3 Series 2007-2013     E90/E91/E92/E93     B3 Bi-Turbo Alpina B3 S Series 2010-2013     E90/E91/E92/E93     B3 S Bi-Turbo Alpina D3 Series 2008-2013     E90/E91/E92/E93     D3 Bi-Turbo