BMW F30 320iX F32 420iX B48 Bare Engine B48B20A 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 F30 320iX F32 420iX B48 Bare Engine B48B20A New Timing Installed WARRANTY is a used, complete bare engine block from the B48 family, designed for modern BMW models with xDrive. This bare engine, featuring a freshly replaced timing system, provides a solid foundation for a professional engine replacement, ensuring stable operation and precise timing performance under demanding operating conditions.

Specifications and technical data

• SKU: 2455344-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2455344
• Substitutable numbers: 2455344, 11002455344, 11002455343, 2455343, 11002409356, 2409356
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Mileage: A

Purpose and compatibility

The offered engine block is dedicated to popular 3 and 4 series models with all-wheel drive, such as the BMW F30, F31 LCI 320iX and F32, F34, F36 420iX. The construction is based on the modern, four-cylinder B48B20A petrol unit, widely used across the BMW range, which facilitates the selection of accessories and integration with the vehicle's factory electronics.

As a bare engine, it allows for the transfer of existing components from the previous unit (including the intake system, exhaust system, and auxiliary equipment), which is cost-effective and enables the maintenance of a configuration consistent with the specific vehicle's equipment.

Construction and technical characteristics

The B48B20A unit belongs to the new generation of BMW engines, designed for efficiency, refinement, and flexibility. The four-cylinder layout provides a favorable balance between weight and performance, while the modern block and cylinder head architecture promotes stable operation across a wide load range.

A key advantage of the offered engine is the new timing system, which significantly reduces the risk of typical failures associated with worn-out timing drive components. For the user, this means a lower risk of costly repairs in the future and greater operational predictability after installation.

Practical application and installation benefits

Replacing the engine with this unit is particularly beneficial in situations where the existing engine has suffered severe mechanical damage or would require uneconomical repairs. Using a bare engine allows you to:

• restore the efficiency of the drivetrain while retaining original accessories,
• minimize vehicle downtime in the workshop,
• achieve a predictable condition of key mechanical components thanks to the fresh timing system,
• maintain the factory performance characteristics of the powertrain.

For workshops specializing in the BMW brand, this is a solution that allows for the efficient execution of complex repairs, and for the user – it restores full vehicle functionality while maintaining proper dynamics and refinement.

Condition, verification, and installation aspects

The engine comes from the Engines category and is offered as a used bare block, which in practice means it is necessary to transfer accessories from the previous unit and perform standard service procedures during installation (e.g., fluid replacement, seal inspection, ECU adaptations). This delivery method is often chosen by professional services because it allows for compatibility with the existing installation and vehicle equipment.

Before installation, it is recommended to have the unit thoroughly verified by a mechanic specializing in BMW, taking into account the manufacturer's procedures. Properly performed installation and engine control configuration translate into stable, repeatable operation and full utilization of the B48B20A unit's potential in daily use.

Further knowledge and selection of other components

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

For users interested in a broader context of BMW engine failures, including earlier generations, the following article describing typical problems and repair costs may be helpful – you can find it here: Troublesome BMW E90 engines – a practical guide to problematic units.

If you want to better understand when choosing a used engine block is economically justified and how to compare it with other used components, it is worth checking out the guide: the best used car parts for popular brands, which discusses practical criteria for selecting original components from the secondary market.