BMW N46 2.0 Crankshaft – E90 320i E60 520i

Description At the heart of every BMW N46 engine rebuild is a crankshaft you can trust. This precision replacement crankshaft is engineered specifically for the BMW N46 2.0 engine as fitted to the E90 320i and E60 520i, delivering OEM-matching dimensions, journal finish, and balance tolerances straight out of the box. Whether you’re replacing a worn, scored, or damaged crankshaft, or building a fresh engine from the bottom up, this crankshaft provides the solid foundation your N46 rebuild demands. What’s Included: One (1) replacement crankshaft for the BMW N46 2.0 engine. Key Benefits: OEM-specification main and rod journal dimensions for correct bearing clearances Precision ground and polished journals for smooth, consistent bearing contact Factory-balanced for vibration-free operation and reduced drivetrain stress High-strength forged or cast steel construction engineered to handle the thermal and mechanical demands of the N46 2.0 engine Direct replacement — no machining required when used with standard-size bearings Compatible with both standard and reground journal sizes (where applicable) When Should You Replace Your Crankshaft? The crankshaft is one of the most critical and highly stressed components in your engine. Replacement is typically required when: Journals are scored or deeply grooved – caused by bearing failure or oil starvation Journal dimensions are out of tolerance – beyond the limits of regrinding Crankshaft is cracked or damaged – often discovered during a strip-down following engine failure Full engine remanufacture – where a new crankshaft ensures a known, reliable baseline Oil pressure cannot be restored – even after bearing replacement, due to excessive journal wear Signs Your Crankshaft May Need Replacing: Persistent bottom-end knock that doesn’t resolve after bearing replacement Catastrophic engine failure due to oil starvation or spun bearing Metal debris or bearing material found in the oil sump Crankshaft journals measured outside of serviceable tolerances during a rebuild inspection Ideal For: BMW specialist workshops, engine remanufacturers, and experienced engine builders undertaking a complete bottom-end rebuild or full engine remanufacture on the BMW N46 2.0 platform.