BMW 3 Series E90 E91 325i Petrol N52 218HP Complete Engine N52B25A 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.

BMW 3 Series E90 E91 325i Petrol N52 218HP Complete Engine is a factory-spec power unit from the N52 family, designed for 325i models with 218HP. This solution is intended for users who want to restore their vehicle to full working order while maintaining the original BMW engine performance characteristics and compatibility with the vehicle's factory electronics.

Specifications and technical data

• SKU: 0415404-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 415404
• Substitutable numbers: 11000415404, 0415404, 11000398740, 0398740, 11000415405, 0415405, 11000398741, 0398741
• Fuel type: Petrol
• Number of cylinders: 6
• Category: Engines
• Mileage: 59 000

Technical specifications of the N52 unit

The offered engine belongs to the Engines category and is designed for petrol fuel, ensuring the linear throttle response typical of BMW and a level of refinement suitable for both daily commuting and dynamic driving. The six-cylinder inline configuration promotes smooth torque delivery and reduced vibration, which translates into higher driving comfort.

The unit is complete, which facilitates the replacement process in the workshop and helps minimize vehicle downtime. The engine is sourced from dismantling, has a documented mileage, and is covered by a seller's warranty, providing additional security when investing in a used powertrain component.

Purpose and application in the BMW 3 Series

The N52 engine was designed for BMW 3 Series E90 and E91 models in the 325i version, ensuring full compatibility with factory control systems, ancillaries, and engine bay mounts. This configuration allows for a near plug-and-play installation without the need for structural modifications to the body or wiring.

The unit will serve well both as a replacement for a damaged engine and as a base for further mechanical or software modifications, while maintaining the original BMW powertrain architecture. Due to the retention of the factory fuel type and cylinder count, there is no need to interfere with the fuel or exhaust systems beyond standard installation procedures.

Benefits of choosing a used engine with a warranty

Purchasing a used engine with a warranty is a solution that allows for significant repair cost savings compared to a brand-new unit, while maintaining high functionality. Engine mileage is a key parameter when assessing its operational potential – a lower value usually means less wear on moving parts and a greater reserve of durability.

The six-cylinder petrol unit offers a balanced compromise between performance and refinement, which is particularly important in premium mid-size cars. Combined with the seller's warranty, you receive a technically verified component that can become a solid foundation for further vehicle operation without the need for costly overhauls of the old engine.

Additional information on how to safely select used power units can be found in our expert guide Why it is worth buying used gearboxes and engines – facts instead of myths, which describes, among other things, selection by OEM numbers and real cost differences.

Selection, compatibility, and installation aspects

Before purchasing, it is recommended to verify the engine's compatibility with the specific vehicle equipment version, model year, and installed ancillaries. It is helpful to compare the OEM part number and interchangeable numbers, as well as consult with a mechanic or technical advisor. This minimizes the risk of incompatibility with the wiring harness, engine control unit, or cooling system components.

The N52 family engine is well-known to workshops specializing in the BMW brand, which facilitates the installation process and subsequent service. Proper preparation for installation – including replacing consumables such as engine oil or coolant – allows you to fully utilize the unit's potential and reduce the risk of failure in the first months of use.

Expanding the scope of work in the powertrain area

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 blocks, cylinder heads, or complete powertrain assemblies, check out the available parts in the BMW Engines category.

Summary

BMW 3 Series E90 E91 325i Petrol N52 218HP Complete Engine is a proposal for drivers who expect to maintain the factory handling characteristics and the sound of an inline-six within a rational repair budget. A used unit with a warranty, designed for a specific model and version, allows for efficient replacement and restoration of the powertrain to full efficiency, while maintaining the technical standards characteristic of the BMW brand.