This ACL Main Bearing Set is sized for a stock, unmachined crankshaft journal (Standard). It fits the BMW 3.0L inline-6 used in the 1 Series M (2011), 135i (2008-2010), 328i (2007-2013), 335i/335i xDrive/335is/335xi (2007-2015), 535i/535i xDrive/535xi (2008-2010), 740i/740Li (2011-2012), X6 xDrive35i (2008-2010), and Z4 sDrive35i/sDrive35is (2009-2016).
Specifications:
- Type: Main Bearing Set
- Size: Standard
- Engine Fitment: BMW N54/N55/S55B30 3.0L Inline-6
- Part Number: 7M1397H-STD
FAQ
What does "Standard" size mean on this bearing set?
Standard means the bearings are sized for a stock, unmachined crankshaft journal.
What vehicles use the N54/N55/S55B30 engine?
The BMW 1 Series M, 135i, 328i, 335i (and variants), 535i (and variants), 740i/740Li, X6 xDrive35i, and Z4 sDrive35i/35is.
Is this a main or rod bearing set?
Main bearing set - it supports the crankshaft in the engine block.

