BMW 7 Series E65 730d Diesel M57N Complete Engine 306D2 with 52k miles, WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.
The warranty covers the engine itself; engine accessories are covered by a 30-day warranty.
The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a complete engine.
The engine comes from a right-hand drive (RHD) vehicle. The wiring harness is not compatible with left-hand drive (LHD) vehicles and requires replacement or modification.

BMW E65 730d Diesel M57N Engine 306D2 is an original diesel engine from the M57N family, designed for the luxurious BMW 7 Series E65 sedan. This six-cylinder unit provides the characteristic smooth operation and stable performance of this model, while maintaining reasonable fuel consumption.

Specifications and technical data

• SKU: 0306821-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0306821
• Substitutable numbers: 11000306821, 0306821, 11007788536, 7788536, 11000306823, 0306823, 11007788537, 7788537
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Mileage: 59 000

Technical Characteristics of the BMW M57N 306D2 Engine

The presented engine belongs to the Engines category and is a six-cylinder, inline configuration, powered by Diesel fuel. This setup ensures smooth operation, a favorable torque curve, and predictable performance across the entire RPM range.

The M57N family is valued for the durability of its block, cylinder head, and crankshaft-piston assembly, which translates to stable operation under typical operating loads. The engine was designed for long-term use in premium vehicles where both comfort and adequate power reserves are important.

Mileage and Operating Condition

The unit has documented mileage, allowing for a better assessment of its operational history and planning for future use. Moderate mileage is a significant advantage for M57N engines, as this design is known for its high mileage potential with proper maintenance.

The engine is offered as used, providing a favorable compromise between purchase cost and the ability to restore the vehicle to full operational status. For many BMW E65 730d owners, this is an effective solution for repairing significant engine damage or for a comprehensive vehicle restoration.

Application and Selection by VIN/OEM

The BMW E65 730d Diesel M57N Engine 306D2 is intended for installation in the BMW 7 Series E65 generation, specifically the 730d model. Before purchasing, it is recommended to verify compatibility using the VIN and OEM numbers to ensure full compatibility with the specific equipment version and model year of the vehicle. This selection method minimizes the risk of incompatibility with accessories, wiring harnesses, and control units.

For users who wish to deepen their knowledge on purchasing engines from the secondary market, the expert guide: Why Buying Used Gearboxes and Engines is Worth It – Facts Instead of Myths will be useful. The article discusses, among other things, VIN/OEM selection procedures, common myths about used engines, and the cost ratio of repairs versus replacing the entire unit.

Benefits of Installing a Used BMW M57N Engine

Choosing a used engine from the M57N family for the BMW E65 730d allows for:

• Reduced repair costs compared to purchasing a brand-new unit or a complete rebuild of a damaged engine.
• Maintaining the original driving characteristics specific to the BMW 730d, without the need to adapt other types of units.
• Better integration with the vehicle's existing electrical and electronic systems due to structural compatibility within the same engine generation.
• The possibility of continuing to operate a premium car while maintaining a reasonable service budget.

BMW Engines – Offer in the Same Category

If you are looking for other BMW engines for various models of this brand, check out our dedicated category: BMW engines. This will allow you to easily compare available units in terms of fuel type, number of cylinders, and model application.