BMW G20 320iX X3 G01 X4 G02 20iX Complete Engine B48B20A B48C 79k, 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 G20 320ix X3 G01 X4 G02 20ix Complete Engine B48B20A B48C is a complete gasoline engine from the B48 family, designed for modern BMW models with xDrive. This unit provides a solid foundation for a professional drivetrain replacement in premium vehicles, maintaining factory performance characteristics and driving refinement.

Specifications and technical data

• SKU: 5A078C6-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5A078C6
• Substitutable numbers: 5A078C6, 11005A078C6, 2470902, 11002470902, 5A078C5, 11005A078C5
• Fuel type: Petrol
• Number of cylinders: 4
• Part type: Complete Assembly
• Category: Engines
• Engine code: B48B20A B48C
• Mileage: 79 000

BMW B48 Engine Characteristics

The presented engine belongs to the modern B48 family of four-cylinder gasoline units, used in models such as the 3 Series G20 and the X3 G01 and X4 G02 SUVs in their 20i xDrive variants. The design is intended to combine dynamic acceleration with reasonable fuel consumption, while maintaining BMW's characteristic precise throttle response.

Thanks to its compact construction and optimized accessory system, the engine works well with the all-wheel-drive system, ensuring stable torque transfer to all wheels and predictable vehicle behavior in daily use.

Engine Construction and Purpose

The B48 engine in this configuration has been developed as a gasoline unit for mid-size cars and SUVs, where both driving comfort and adequate power reserve are important. The four-cylinder layout allows for a reduction in the drivetrain's weight, which translates into favorable front-axle load distribution and stable handling.

The unit is designed to work with modern automatic transmissions and advanced control electronics, enabling the preservation of factory driving modes such as Comfort, Sport, or Eco. This allows for the restoration of the vehicle's original performance characteristics after proper installation and control unit adaptation.

Benefits of Installing a Complete Engine

Choosing a complete B48 engine for the BMW G20 320ix, X3 G01, or X4 G02 is a solution that in many cases reduces repair time compared to extensive regeneration of a damaged unit. From the perspective of the workshop and the end-user, this means:

• Simplified Installation Process – the ability to swap a complete unit instead of disassembling and reassembling the old engine.
• Better Cost Control – easier estimation of the total repair budget compared to phased regeneration.
• Component Consistency – maintaining a uniform configuration of components within a single engine, which facilitates diagnostics and subsequent servicing.
• Restoration of Factory Performance Parameters – with proper selection and installation, it is possible to preserve the original dynamics and refinement of the unit.

Condition, Mileage, and Practical Application

The engine comes from operational use and has documented mileage, allowing for a realistic assessment of its wear in the context of further vehicle operation. For workshops specializing in the BMW brand, this is a good basis for a professional drivetrain replacement in cars used daily, as well as in fleet vehicles.

The unit is particularly suitable for situations where the existing engine has suffered serious mechanical or thermal damage, and repair is no longer economically viable. In such cases, installing a complete engine allows for restoring the vehicle's functionality while maintaining a high level of driving comfort and predictable road behavior.

Engine Selection and Technical Support

When selecting this unit for a specific BMW model, it is crucial to verify the compatibility of the engine code, model version, and accessory configuration. If in doubt, it is advisable to consult with an experienced workshop specializing in the BMW brand, which can assess the scope of necessary adaptation work and select appropriate operating fluids and startup procedures after installation.

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 and choose a solution tailored to your specific repair project.

Operational Safety and Knowledge of Common Failures

When replacing a drivetrain unit in a BMW, it is beneficial to be aware of common issues in previous generations of the brand's models to better plan preventive maintenance. A good knowledge base can be found in an article dedicated to the earlier 3 Series, which discusses critical structural points and their impact on the user's budget: Common BMW E90 Engine Failures: Find Out What Can Ruin Your Budget!. This allows for a conscious approach to servicing even newer units like the B48.