BMW X3 E83 LCI 2.5si N52N N52B25A Petrol Bare Engine 218HP New Timing 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 New Timing WARRANTY is a used, complete block with cylinder head in a bare engine configuration, designed for the petrol six-cylinder unit in the BMW X3 E83 LCI 2.5si model. This is a solution for users looking for a technically compatible engine block replacement while maintaining the power characteristics and refinement of the original unit. Thanks to the new timing chain and low mileage, this block provides a solid foundation for a professional powertrain repair.

Specifications and technical data

• SKU: 0420493-1
• 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

Purpose and compatibility

The offered engine block is dedicated to the facelifted 2.5si version of the BMW X3 E83, equipped with a petrol, inline six-cylinder engine from the N52 family. The design of the unit with the N52B25A designation ensures the flexibility, smooth operation, and good throttle response characteristic of this series, which is important both in daily use and during dynamic driving.

A bare engine means it serves as a base for transferring accessories from the previous engine, which facilitates compliance with the electronics and equipment of a specific vehicle. This solution is often chosen by workshops specializing in the BMW brand, as it allows for the optimization of repair costs while maintaining a high-quality final result.

Construction and technical parameters

The N52 engine family is a modern, aluminum construction with an inline cylinder layout, designed for a favorable power-to-weight ratio and efficient operation across a wide rev range. The number of cylinders: 6 translates into high refinement, reduced vibrations, and smooth power delivery, which is particularly noticeable in BMW X3 class vehicles.

The unit runs on petrol, which, combined with the advanced design of the cylinder head and timing system, allows for 218 HP of power while maintaining reasonable fuel consumption. The new timing system in this block is a significant advantage in terms of durability – it minimizes the risk of failure in an area that is crucial for reliability in engines of this generation.

Condition, mileage, and application in repairs

The offered item comes from the Engines category and is classified as used, with a mileage of only 79,000 km, which is a relatively low value for N52 units. Such mileage, combined with the replaced timing system, makes the block suitable for use in both routine repairs and more advanced renovation projects.

The bare engine is particularly recommended in situations where the existing block or cylinder head has suffered mechanical damage (e.g., overheating, cracks, seizure), while the engine accessories remain in a condition suitable for further use. Transferring the accessories to a verified base with a new timing system allows for the restoration of full powertrain functionality while maintaining the original vehicle specifications.

Benefits of choosing a used engine block

Purchasing a used BMW N52 engine block is a solution that combines economic aspects with technical repair correctness. Compared to a brand-new unit, the cost of such an operation is significantly lower, while maintaining the original design and operating parameters. The new timing system in the offered block further increases the attractiveness of the purchase, reducing the need for immediate service investments after installation.

If you want to better understand how to safely and consciously choose used power units, selection procedures based on OEM numbers, and what the real cost differences are compared to new parts, it is worth reading our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths. This is a practical supplement to your knowledge when planning an engine repair in a BMW X3.

Expanding repairs within the BMW powertrain

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 additional engine blocks, short blocks, or complete power units, check out the available parts in the BMW Engines category.