BMW G20 G21 320i 330i G30 G31 520i 530i B48D Bare Engine B48B20B 57k, 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 G21 320i 330i G30 G31 520i 530i B48D Bare Engine B48B20B is a petrol, four-cylinder engine block designed for modern BMW 3 and 5 series models. The offered item is a bare engine block, ideal as a base for professional repair or engine conversion in vehicles with the B48B20B engine code. Thanks to its precise construction and compliance with BMW factory standards, it provides a solid foundation for further assembly of engine components.

Specifications and technical data

• SKU: 2461946
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2461946
• Substitutable numbers: 2461946, 11002461946, 2461947, 11002461947, 5A55E68, 11005A55E68
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Engine code: B48B20B
• Mileage: 57 000

Purpose and compatibility

The presented engine block belongs to the Engines category and is dedicated to BMW vehicles from the G20/G21 (320i, 330i) and G30/G31 (520i, 530i) families equipped with the B48 series petrol unit. The design, based on the B48B20B engine code, allows it to be used as a replacement in cars originally fitted with this generation of power units, while maintaining the correct architecture of the block, cylinder head, and cylinder layout.

The engine as a bare block is particularly useful in situations where the existing unit has suffered mechanical damage (e.g., cracked block, cylinder damage), while the accessories and installation remain functional and can be transferred. This solution allows for optimized repair costs while maintaining a high-quality base component.

Construction and technical characteristics

The B48B20B unit is a modern, inline four-cylinder petrol engine, designed for efficient use of engine bay space and appropriate structural rigidity. The applied block architecture ensures stable piston guidance, and the cylinder layout promotes smooth operation and good refinement across typical RPM ranges.

The engine belongs to the B48 family, which in the BMW range represents modern petrol units with optimized efficiency and a favorable power-to-weight ratio. The offered block is prepared as a base for further assembly – it requires the transfer of accessories, fuel system, intake, exhaust, and auxiliary equipment according to the specific vehicle configuration.

Practical application and assembly advantages

The B48B20B bare engine block is suitable for both professional service centers and specialized workshops dealing with BMW engine repairs. Replacing it with a complete block and head allows for shorter repair times compared to a full rebuild of a damaged engine, while maintaining control over the selection of accessories and configuration for a specific model (320i, 330i, 520i, 530i).

With proper installation, using the correct seals, bolts, and tightening procedures, such a block provides a stable foundation for further vehicle operation. The ability to use existing accessories from the car reduces costs while allowing the original equipment specification to be maintained.

Condition, origin, and performance parameters

The offered engine comes from dismantling and is classified as a used part, which in practice means a favorable price-to-functionality ratio compared to brand-new units. The declared mileage ensures attractive potential for further operation, especially with proper installation and the use of appropriate operating fluids and service schedules.

The unit runs on petrol, which is consistent with the factory specification of BMW 3 and 5 series models from the B48 family. This makes it possible to maintain the original operating parameters of the fuel system, engine control unit, and other systems cooperating with the power unit.

Selection by OEM/VIN and expert knowledge

When selecting an engine block for a specific BMW vehicle, it is crucial to verify compatibility using the OEM number and the vehicle's VIN. This avoids mechanical and electronic compatibility issues and ensures a correct fit with the transmission, wiring harness, and ECU. To better understand how to safely choose used power units and what the real benefits of such a solution are, it is worth reading our guide: Why it is worth buying used gearboxes and engines – facts instead of myths.

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, heads, or complete power units, check out the available parts in the BMW Engines category.