BMW X3 E83 LCI 2.5si N52N N52B25A Petrol Bare Engine 218HP 49k miles, 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 X3 E83 LCI 2.5si N52N N52B25A Petrol Bare Engine 218HP 49k miles, WARRANTY is a used, original engine block from the N52 family, designed for the petrol version of the BMW X3 E83 LCI 2.5si. This is a solution for users and workshops looking for a proven base for engine overhaul or replacement while maintaining factory performance characteristics and compatibility with existing accessories.

Specifications and technical data

• SKU: 0420493
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0420493
• Substitutable numbers: 0420493, 11000420493, 0420494, 11000420494
• Fuel type: Petrol
• Number of cylinders: 6
• Category: Engines
• Engine code: N52B25A
• Mileage: 49 000

Technical specifications of the N52B25A engine block

The offered bare engine block belongs to the family of modern BMW inline-six petrol units. The design, based on a lightweight block and cylinder head with an advanced valve train, ensures smooth, balanced operation and the characteristic R6 refinement. The engine in this configuration is designed for petrol fuel, which facilitates integration with the vehicle's factory injection and ignition systems.

The bare engine block provides a solid foundation for further assembly – it allows for the transfer of existing components from the damaged unit, such as manifolds, auxiliary equipment, or control elements, while maintaining the original mechanical architecture.

Application in the BMW X3 E83 LCI 2.5si

The presented engine block is intended for installation in the BMW X3 E83 LCI (facelift) 2.5si version, which allows for maintaining factory power and torque parameters as well as proper cooperation with the vehicle's stock electronics. Thanks to the engine code compatibility with the model's factory specification, it is possible to minimize the need for adaptations and modifications during installation.

Such a solution is particularly beneficial for workshops specializing in the BMW brand that want to reduce repair time by utilizing existing accessories and wiring, while maintaining consistency with the vehicle's service documentation.

Benefits of choosing a used engine block

A used engine block from the N52 family is an attractive alternative to a full overhaul of a damaged unit or purchasing a new engine. It allows for a significant reduction in repair costs while maintaining high functionality and compliance with factory solutions. For many users, this is an optimal compromise between budget and durability.

To better understand the differences between new and used power units and to learn about selection procedures based on identification numbers, it is worth reading the expert guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses the practical aspects of purchasing such components.

Practical installation and maintenance tips

Before installation, standard preparatory steps are recommended, such as checking for leaks, verifying the condition of mounting points, and preparing the contact surfaces for accessories. Replacing consumables (oil, filters, seals) at the time of installation minimizes the risk of future leaks and facilitates further diagnostics.

A properly selected and prepared engine block allows for the efficient restoration of the vehicle to roadworthy condition, which is important for both individual users and workshops that want to limit the vehicle's downtime in the service center.

Expanding repairs within the BMW power unit

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

Additionally, to better plan repair time and understand how the availability of used components affects workshop workflow, you can use the advice contained in the article Availability of car parts off the shelf vs. repair time – how used OEM parts shorten the stay in the workshop?, which describes practical service scenarios.