Engine Main & Rod Bearing Set Polymer Coated BMW N51 N52 N54 N55 3.0L

This master bearing kit includes both crankshaft main and connecting rod bearings enhanced with high-tech IROX® polymer coating for BMW N-series engines. In modern applications featuring Start/Stop technology or high-boost turbocharging (N54/N55), the rotating assembly is subject to extreme boundary lubrication conditions. The IROX® polymer matrix provides an essential sacrifice layer that reduces friction and prevents metal-to-metal contact during start-up before full oil pressure is achieved. These bearings offer superior fatigue resistance and increased load-carrying capacity, ensuring the structural integrity of both the crankshaft journals and the connecting rod big-ends. Ideal for comprehensive engine rebuilds, this kit provides the highest level of protection against premature wear in BMW’s performance-oriented straight-six power units.