BMW E39 523i Petrol M52 170HP Bare Engine 256S4 with 109k 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 E39 523i Petrol M52 170HP Bare Engine 256S4 with 109k miles, WARRANTY is a used, original engine block from the M52 family, designed for 5 Series E39 models with a petrol engine. The bare engine serves as a solid foundation for professional rebuilding or replacing an existing unit, allowing you to maintain the refined performance of the inline-six and the correct factory parameters characteristic of this generation. This is a solution for users and workshops looking for a technically compatible component rather than a full, complete engine.

Specifications and technical data

• SKU: 1432578
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 1432578
• Substitutable numbers: 1432578, 11001432578, 11001432579, 1432579
• Fuel type: Petrol
• Number of cylinders: 6
• Category: Engines
• Mileage: 109 000

Technical characteristics of the M52 engine block

The presented engine belongs to the Engines category and is designed for a six-cylinder inline petrol unit. This configuration ensures smooth power delivery, good flexibility across the entire rev range, and the fluidity of operation typical for BMW. The bare engine includes the basic block with the cylinder assembly, serving as a foundation for further assembly of accessories according to the requirements of a specific vehicle.

The inline cylinder layout facilitates maintenance and diagnostics, and allows for precise matching of other components – such as the cylinder head, fuel system, or auxiliary equipment – in accordance with the factory configuration of the given BMW E39 523i.

Application in BMW E39 523i

The engine in the form of a bare block is intended for installation in the BMW 5 Series E39 model, specifically the 523i version with the M52 unit producing a catalog power of 170 HP. This type of component is suitable both for replacing a damaged block and for advanced restoration projects where maintaining the original powertrain specification is crucial.

By maintaining the correct fuel type and cylinder layout, the block allows for the restoration of the factory engine performance characteristics, while providing the flexibility to individually select accessories and configurations according to the needs of the user or workshop.

Benefits of choosing a bare engine

Choosing a bare engine instead of a complete unit gives the workshop greater flexibility in terms of further assembly and regeneration. It is possible to:

• transfer proven accessories from the previous unit,
• select new or used components according to your own quality standards,
• control the stages of the repair and precisely match the vehicle's specific configuration.

This approach is particularly beneficial for professional repairs, where the ability to individually select parts and maintain consistency with the original BMW specification is paramount.

Selection by part numbers and technical support

The engine as a bare block has an assigned OEM part number and interchangeable numbers, which facilitates clear identification in catalogs and service systems. When selecting accompanying elements – such as the cylinder head, injection system, or auxiliary equipment – it is worth using these markings to maintain full compatibility with the specific version of the BMW E39 523i.

If you want to streamline the process of selecting components based on the OEM number or vehicle data, a practical guide will be helpful: how to choose the right car part by VIN and OEM number, where you will find a step-by-step procedure and a list of key questions for the seller.

Related units and service knowledge

The family of BMW engines used in subsequent generations, such as the E90, has its specific weak points, so when planning repairs, it is worth knowing the typical design and operational problems. For users interested in a broader context of BMW unit failures, we have prepared material describing critical areas in newer models: Troublesome BMW E90 engines: check what can ruin your budget!. Knowledge from such studies helps to better plan the scope of work and avoid recurring faults.

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, cylinder heads, or complete power units, check the available parts in the BMW Engines category.