Replacement Part: Replacement part for damaged or worn eccentric shaft bearing, restoring engine function and helping prevent further damage. Compatibility: Specifically designed for BMW models including M3 and X4. Verify compatibility by OEM part number 11377615379 to avoid mismatches. Functionality: The eccentric shaft is a key component of the engine's cranklink system, converting piston reciprocating motion into crankshaft rotation to enable power delivery. Material and durability: Constructed from sturdy iron and polypropylene (PP); built to withstand engine heat and vibration for reliable performance. Fit and performance: Engineered to OEM specifications for precise fit, proper clearance, and smooth operation, supporting reliable timing and reducing wear risk in the crank/drive train. Use scenarios: During scheduled maintenance or an engine overhaul on M3 or X4, the worn eccentric shaft bearing to restore power and smooth idle. In engine rebuilds where the cranklink mechanism shows wear, install the replacement to ensure correct timing and operation. As a preventive replacement in mileage engines to help avoid timingrelated issues and extend engine life.