BMW E60 E61 LCI 525d Bare Engine M57N2 306D3 197HP New Timing Installed 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 E60 E61 LCI 525d Bare Engine M57N2 306D3 197HP New Timing Installed WARRANTY is a used, complete diesel engine block prepared as a solid foundation for professional repair or engine swap in the BMW 5 Series. The design, based on the proven M57N2 family, ensures stable operation, high refinement, and significant operational potential when properly maintained. The bare engine allows for the flexible transfer of accessories from your existing engine, making it easier to match the specific configuration of your vehicle.

Specifications and technical data

• SKU: 0441303-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0441303
• Substitutable numbers: 11000441303, 0441303, 11000441304, 0441304, 11000428397, 0428397, 11000428398, 0428398
• Fuel type: Diesel
• Number of cylinders: 6
• Category: Engines
• Engine code: 306D3
• Mileage: 99 000

Technical characteristics of the M57N2 unit

The offered engine block belongs to the Engines category and is intended for BMW 5 Series E60/E61 LCI 525d models with the M57N2 unit, code 306D3. It is an inline six-cylinder diesel engine, known for its good flexibility, smooth operation, and favorable performance-to-fuel consumption ratio. The cylinder layout promotes even crankshaft loading and reduces vibrations, which translates into driving comfort and the durability of cooperating components.

Scope of application and compatibility

The engine was designed as a power unit for the BMW 525d in E60 and E61 facelift versions, where it works with factory injection systems, ECUs, and transmissions intended for the M57N2. The bare engine serves as a base for transferring accessories from the previous engine, which facilitates maintaining full compatibility with the electrical installation, intake, exhaust, and cooling systems of a specific vehicle.

The diesel unit from this series performs well both in daily use and in more demanding conditions, provided it is installed correctly and appropriate operating fluids are used. The engine's mileage allows for further operational use while maintaining proper service procedures.

Construction, operating parameters, and new timing

The inline six-cylinder layout combined with the diesel fuel system ensures even torque delivery across a wide rev range. This type of construction is valued for its refinement and predictable behavior under load, which is important in both city and highway driving. The described engine features a new timing system, which significantly reduces the risk of failure in this area and lowers the costs of additional work after installation.

The new timing system is a significant advantage when choosing a used engine – it eliminates the need for immediate replacement of timing components after purchase, thereby shortening vehicle downtime and simplifying the planning of future maintenance. As a result, this engine block is an attractive base for a powertrain overhaul in a BMW 525d, allowing you to focus on correct installation and accessory configuration.

Practical benefits of installing a used engine block

Using a used engine block instead of a worn or damaged unit allows for significant repair cost savings compared to purchasing a brand-new engine. At the same time, the original operating characteristics intended by the manufacturer for the given BMW model are preserved, which facilitates diagnostics, service, and subsequent resale of the vehicle. The six-cylinder diesel engine provides an adequate torque reserve, which translates into comfortable driving at low and medium RPMs.

If you want to better understand how to safely choose used power units and what the real cost differences are compared to new parts, it is worth reading the expert guide Why it is worth buying used transmissions and engines – facts instead of myths, which discusses, among other things, selection by OEM numbers and practical repair calculation examples.

BMW engines – expansion and modernization of the powertrain

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other elements from the same group, such as blocks, cylinder heads, or other engines, check the available parts in the BMW Engines category.

For users interested in a broader look at the drivetrain in this brand, including the differences between standard units and M or M Performance versions, the blog post BMW M Performance: how do BMW M components differ from standard ones? may also be helpful, as it discusses the drivetrain area and the use of used components in modernization projects.