BMW F30 F10 F25 N20 Engine Crankshaft 7599246 - Used Original Parts

Diagnosis and Common Symptoms

The N20 engine is notorious for timing chain guide failures which often lead to oil starvation or debris clogging the oil pickup tube. When this occurs, the most common result is a spun connecting rod bearing, which scores the crankshaft journals. Symptoms include a loud, rhythmic "rod knock" coming from the bottom end of the engine that increases with RPM, often accompanied by a "Low Oil Pressure" warning on the dashboard. In severe cases, the engine will seize and refuse to crank. A physical inspection of the oil filter housing usually reveals copper or magnetic metallic shavings, confirming internal bottom-end damage.

Introduction

Restoring an N20 engine requires components that meet strict factory metallurgical standards. This is a Genuine used BMW crankshaft, salvaged from a donor vehicle and inspected to ensure it maintains structural integrity. Unlike aftermarket castings which can be prone to cracking under boost, this original part retains the correct factory balancing and weight. We have visually checked the main and rod journals to ensure they are free from deep gouges or heat discoloration, making this a viable candidate for your engine rebuild.

Product Details

• Brand: BMW

• Model Compatibility: BMW F30 (320i, 328i), F10 (520i, 528i), F25 (X3), E84 (X1), Z4 (E89) with N20B20 Engines

• Part Number: 7599246

• Part Name: Engine Crankshaft

• Condition: Genuine Used (Tested Working)

• Notes: Standard journal size (not undersized). While inspected, we always recommend a professional micro-polish and balancing by your machine shop prior to installation with new bearings.