BMW G20 320dX G30 520dX X3 G01 X4 G02 20dX Bare Engine B47D20B 29k, 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 G20 320dX G30 520dX X3 G01 X4 G02 20dX Bare Engine B47D20B 29k, WARRANTY is a used, factory-spec engine block from the B47 family, designed for modern BMW models with all-wheel drive. The bare engine configuration allows for the precise transfer of accessories from the existing unit, which facilitates cost control and maintains the vehicle's original specifications. This solution is particularly beneficial for professional repairs in premium vehicles, where structural integrity and stable engine performance are paramount.

Specifications and technical data

• SKU: 2457657
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2457657
• Substitutable numbers: 2457657, 11002457657, 2457655, 11002457655
• Fuel type: Diesel
• Number of cylinders: 4
• Category: Engines
• Engine code: B47D20B
• Mileage: 29 000

Technical characteristics of the B47D20B engine

The presented engine block belongs to the modern family of BMW diesel units, designed to effectively combine performance with economy. The four-cylinder construction provides a balanced compromise between refinement and powertrain weight, which translates into predictable vehicle behavior both on the road and in daily use. The use of diesel fuel allows for favorable fuel consumption while maintaining adequate flexibility across the entire rev range.

The bare engine version is the right choice in situations where the accessories (injectors, turbocharger, manifolds, covers, wiring harnesses) remain in good working order and can be transferred from the previous unit. This configuration makes it easier to retain the vehicle's original equipment while enabling the replacement of the core component, i.e., the block with the cylinder head and the crankshaft-piston system.

Application in BMW models and compatibility

The engine block in question is intended for modern BMW models with xDrive, such as the 3 Series G20 320dX, 5 Series G30 520dX, and the X3 G01 and X4 G02 SUVs in 20dX versions. As such, it provides a coherent solution for workshops specializing in the service of current BMW generations, where compliance with factory design specifications is required. The B47D20B engine code is an important reference point when selecting a unit, as it ensures compatibility with the electronics, drivetrain, and engine control unit software.

In practice, installing such a block in place of a damaged unit allows for the restoration of the vehicle's full functionality while maintaining original performance parameters. For workshops, this means a predictable installation process, and for the user – consistent vehicle behavior after the repair, without the need for structural modifications.

Benefits of choosing a used engine block

Choosing a used engine block from the B47 family is often a justified economic decision, especially in the case of modern BMW models, where the cost of a new unit is very high. A used block allows for a significant reduction in repair costs while maintaining the original design and factory origin of the component. An additional advantage is the ability to use existing accessories, which limits the number of parts that need to be replaced.

For informed users and professional workshops, it is also important that the B47 family units are widely known in the service market, which facilitates diagnostics, maintenance, and long-term upkeep. To better understand the differences between new and used powertrain components and to learn about selection procedures based on identification numbers, it is worth reading our expert guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses the practical aspects of purchasing such components.

Mileage, condition, and use in repairs

The engine as a bare block is primarily intended for professional accident repairs, overhauls of units with a damaged block or cylinder head, and for situations where regenerating the existing engine is not cost-effective. Information about the mileage allows the workshop to assess the potential for further operation and select the appropriate scope of service activities during installation (e.g., replacing seals, checking the timing system, verifying the lubrication system).

In practice, using a used block in modern BMW models enables:

• restoring vehicle functionality with a controlled repair budget,
• retaining original accessories and additional equipment,
• reducing vehicle downtime thanks to a ready-to-install base,
• maintaining compliance with the factory design assumptions of the powertrain.

To compare costs and quality between new and used powertrain components, it is also worth checking the guide New or used? A comparison of costs and quality of car parts, which discusses the differences between OEM aftermarket parts and new replacements in an accessible way.

BMW engines – selecting components from the same group

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 blocks, cylinder heads, or complete powertrain units, check out the available parts in the BMW Engines category.