BMW E60 E87 E90 E91 Engine M47N2 Piston Connecting Rod Crankshaft

BMW E60 E87 E90 Piston with Connecting Rod M47N2 diesel is an original component of the crankshaft-piston system designed for BMW diesel engines from the M47N2 family. This is a solution for users who want to restore the proper operation of the power unit, maintaining factory fitment and engine performance characteristics. A used component from the Other category allows for an economical yet technically correct repair.

Specifications and technical data

• SKU: P0308859
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0308859
• Substitutable numbers: 11240308859, 0308859, 11247790515, 7790515, 11257798315, 7798315
• Category: Other Engine Parts

Purpose and Compatibility

The piston with connecting rod has been designed to work with the M47N2 engine in BMW E60, E87, and E90 series models with a diesel unit. This ensures the correct geometry of the crankshaft-piston system, appropriate compression ratio, and proper interaction with the crankshaft and cylinder head.

Thanks to the use of an original BMW solution, key engine operating parameters are maintained, such as:

• correct piston guidance in the cylinder,
• proper transfer of forces to the crankshaft,
• stable engine operation across the full load range.

Construction and Technical Characteristics

The piston-connecting rod assembly is the central element of the crankshaft-piston system, responsible for converting reciprocating motion into rotational motion. In the case of the M47N2 engine, the design has been optimized for operation in a diesel unit, where high combustion pressures and significant mechanical loads occur.

The most important features of this component include:

• maintenance of factory dimensional tolerances,
• appropriate set weight, crucial for crankshaft balancing,
• adaptation to the operating characteristics of the M47N2 diesel engine.

A system configured in this way allows for maintaining stable engine running culture and reducing vibrations and noise resulting from improper balancing.

Service Application and Installation

The M47N2 diesel piston with connecting rod is suitable for partial and major engine overhauls when it is necessary to replace a single cylinder or the entire set. A used component allows for:

• restoring compression in a damaged cylinder,
• eliminating the effects of seizure or mechanical damage,
• maintaining structural consistency with other BMW engine components.

Due to the specific nature of the crankshaft-piston system's operation, installation in a specialized service center is recommended, adhering to the manufacturer's procedures regarding measurements, bearing selection, and checking operating clearances. This allows for full utilization of the part's potential and ensures safe operation of the power unit.

Benefits of Using an Original BMW Piston with Connecting Rod

Choosing an original BMW component from the Other category primarily means:

• maintaining the factory performance characteristics of the M47N2 engine,
• certainty of fit with the block, crankshaft, and accessories,
• possibility of economical repair thanks to the use of a used component.

This solution is particularly beneficial for repairs of high-mileage units, where both technical correctness and control of service costs are important.

Other Products and Technical Knowledge

If you are also looking for other elements from the Other category dedicated to this brand, check out the other BMW Other parts available in our store to complete a full set for repairing or upgrading your car.

For comparison of the characteristics of sports power units with standard designs, it is worth reading the article describing the differences in engine and chassis construction – you can find it here: Audi RS vs. Other Models – What Lies Under the Hood and Chassis?. This is a good supplement to your knowledge of how modern powertrain systems are designed.