Mini F56 F57 JCW Complete Engine B48A20B Petrol 231HP 69k miles, 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.

Mini F56 F57 JCW Complete Engine B48A20B Petrol 231HP 69k miles, WARRANTY is a factory-spec powertrain from the B48 series, designed for the sporty John Cooper Works versions. This complete petrol engine delivers dynamic performance, high operational refinement, and the aggressive throttle response characteristic of the JCW, ideal for intensive use in F56 and F57 models.

Specifications and technical data

• SKU: 2459234-1
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 2459234
• Substitutable numbers: 2459234, 11002459234, 5A07774, 11005A07774
• Fuel type: Petrol
• Number of cylinders: 4
• Part type: Complete Assembly
• Category: Engines
• Engine code: B48A20B
• Mileage: 69 000

Technical characteristics of the B48A20B unit

The offered engine belongs to the modern B48 family, designed for high efficiency, stable operation, and precise control of combustion parameters. This four-cylinder petrol unit has been configured specifically for the JCW version, which translates into a distinctly sporty character, quick revving, and predictable behavior under load.

The four-cylinder configuration promotes balanced operation and reduced vibration, which is particularly important in high-performance vehicles. The B48A20B engine works well with factory Mini control systems, maintaining compatibility with the vehicle's original electronics and ancillaries.

Purpose and application in Mini F56 / F57 JCW

This complete powertrain unit has been prepared as a replacement for the factory engine in Mini F56 and F57 John Cooper Works models. By maintaining the original specifications, installation in the vehicle allows for the restoration of full powertrain efficiency without the need to modify the wiring or adapt non-standard solutions.

The engine is suitable both for standard replacement of a damaged unit and for upgrade projects where the priority is to obtain a powerful, responsive drive while maintaining factory control logic and diagnostics. The Engines category includes key elements for the operation of the powertrain, and this unit is the central component of the entire system.

Benefits of choosing a complete used engine

Purchasing a complete, used engine for a Mini JCW allows for significant cost savings compared to rebuilding or installing a new unit, while maintaining high functionality. A properly selected engine with documented mileage enables the vehicle to be returned to service efficiently, without the long downtime associated with extensive workshop repairs.

To better understand the differences between new and used powertrains, selection procedures based on OEM numbers, and real cost ratios, it is worth reading our expert guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses the most important aspects of such purchases in a practical way.

Selection, verification, and technical aspects of installation

Before installation, a detailed verification of the engine code compatibility and accessory configuration with the vehicle in which the unit is to operate is recommended. A professional workshop, using Mini service documentation, is able to quickly assess the scope of necessary adaptation work (if any) and prepare the engine for installation in accordance with the manufacturer's requirements.

The B48 family unit was designed to work with advanced control systems, which is why maintaining proper communication with the vehicle's electronics is crucial. A correctly selected and installed engine ensures stable operating parameters, predictable fuel consumption, and full utilization of the JCW version's potential.

If you are planning a comprehensive repair or upgrade of the engine area in your Mini and need other elements from the same group, such as blocks, cylinder heads, or complete powertrain units, check out the available parts in the Mini Engines category.

For a broader look at the market for original, used components for popular models, a practical guide to the most frequently chosen parts may also be helpful: Best used car parts – a guide to the most frequently chosen original parts.