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

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a bare engine.

The engine is sold without accessories (e.g. alternator, starter motor, manifolds, injectors, turbocharger, etc.).

BMW 7 Series E65 730d Diesel M57N Bare Engine 306D2 with 52k miles, WARRANTY is an original power unit from the M57N family, designed for the luxury 7 Series sedan. The engine comes from a vehicle with relatively low mileage, making it an attractive base for a professional replacement or advanced powertrain repair. This is a solution for users looking for a proven, factory-spec diesel engine with stable operating parameters and high refinement.

Specifications and technical data

• SKU: 0306821
• 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 M57N unit

The presented engine belongs to the Engines category and represents a modern BMW diesel design from the M57N family. The inline cylinder layout ensures balanced operation, and the use of diesel fuel allows for a favorable ratio of fuel consumption to performance. The configuration of this unit is valued for its good flexibility, stable operation across a wide rev range, and predictable behavior under load.

The engine was designed for use in a heavier luxury sedan, which is why it handles long-term highway loads and mixed driving conditions well. The low mileage for this class of unit means less wear on moving parts, which in practice translates into greater operational potential after installation in another vehicle.

Application and selection by VIN/OEM

The M57N power unit from the BMW E65 730d model is a popular choice both for standard engine replacement and for more extensive service projects. Thanks to the OEM designation and available interchangeable numbers, it is possible to precisely match the unit to a specific vehicle equipment version and model year, which minimizes the risk of incompatibility with accessories, wiring harnesses, or the ECU.

Before purchasing, it is worth verifying compatibility by VIN and part numbers to ensure that the technical parameters and engine configuration meet the factory requirements of the specific BMW 7 Series vehicle. This selection method is particularly important for diesel units, where differences in accessories and ECU software can affect the operation of the entire powertrain.

For users who want to learn more about the cost-effectiveness of installing a used power unit, selection procedures by VIN, and real costs, the following expert guide will be helpful: Why it is worth buying used gearboxes and engines – facts instead of myths.

Benefits of choosing a used BMW engine

Choosing a used BMW M57N engine for the E65 730d is a solution that allows for significant repair cost savings compared to purchasing a brand-new unit. At the same time, the original engine operating characteristics, consistent with the manufacturer's specifications, are preserved. This is especially important in premium class cars, where matching the power unit to the rest of the system has a direct impact on driving comfort and the durability of other components.

A diesel engine of this design is valued for:

• good refinement for a diesel unit,
• stable performance in daily operation,
• potential for further, long-term operation with proper maintenance,
• easy integration with the factory electronics of the BMW 7 Series.

Thanks to this, it is a sensible choice for workshops specializing in the BMW brand and for conscious users who expect a predictable result after replacing the power unit.

Condition, origin, and practical installation tips

The offered engine is a used item, which in practice means it comes from a vehicle dismantling process and has a specific service history. The low mileage compared to the typical mileage of units installed in the BMW E65 suggests limited wear on key components, such as the crankshaft-piston system or the cylinder head. Before installation, standard preparatory activities are recommended, such as replacing consumables and checking accessories, to maximize the potential of this unit.

The M57N family engine works well with BMW's factory control and drivetrain systems, which facilitates the installation process in the vehicle for which it was intended. For workshops, this means fewer modifications and faster service turnaround, and for the end user – a more predictable repair result.

Powertrain expansion and other BMW Engines

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as complete power units, long blocks, or engines in various power variants, check out the available parts in the BMW Engines category.

For those considering a broader service strategy based on used powertrain components, additional arguments and practical examples are provided in the blog guide: Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses, among other things, selection procedures by VIN/OEM and cost ratios compared to new parts.