BMW E46 330i 330Ci M54 Bare Engine 306S3 M54B30 231HP with 95k 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 E46 330i 330Ci M54 Bare Engine 306S3 M54B30 231HP with 95k miles, WARRANTY is a petrol, inline-six cylinder powertrain designed for BMW 3 Series E46 models in 330i and 330Ci versions. It is offered as a bare engine block, which serves as a solid foundation for professional refurbishment, a swap, or replacing the powertrain in a sports or passenger vehicle.

Specifications and technical data

• SKU: 7506890
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7506890
• Substitutable numbers: 7506890, 11007506890, 7506884, 11007506884, 11007506891, 7506891, 11007506885, 7506885
• Fuel type: Petrol
• Number of cylinders: 6
• Category: Engines
• Engine code: 306S3
• Mileage: 59 000

Technical characteristics of the M54B30 unit

The presented engine belongs to the M54 engine family, known for its smooth operation, refined characteristics, and good throttle response. The inline-six cylinder layout combined with petrol fuel delivery ensures smooth power development and stable operation across the entire rev range. The engine code 306S3 identifies the specific variant used in the 330i and 330Ci versions, which facilitates the selection of accessories and integration with the vehicle's factory electronics.

A bare engine means you receive the basic block with the cylinder head, ideal for transferring your own accessories or building a unit to meet individual requirements – from calm daily driving to more dynamic track applications.

Application and compatibility in the BMW E46

The engine was designed to work with the BMW E46 platform in 330i and 330Ci versions, which allows for maintaining factory mounting geometry and the correct positioning of the unit in the engine bay. As a result, installation is predictable, and integration with the existing wiring harness, cooling system, and drivetrain is much simpler than with units not intended for this model.

The M54B30 inline-six is often chosen for swaps within the 3 Series due to its favorable power-to-weight ratio and proven design. Such an engine block is a good base both for rebuilding to factory specifications and for projects requiring mechanical modifications.

Benefits of choosing a used engine block

Purchasing a used engine block from the M54 family allows for a significant reduction in repair costs compared to a complete, new unit, while maintaining appropriate operational potential. Limiting the purchase to a bare engine gives you the opportunity to use existing accessories, which further reduces expenses and makes it easier to adapt to a specific car configuration.

For conscious BMW users, choosing such a unit is a compromise between economy and maintaining the original driving characteristics. The inline, six-cylinder petrol engine ensures the level of refinement typical for the brand, while simultaneously leaving a wide scope for further service and tuning work.

Professional selection by VIN and OEM numbers

To ensure that the engine will work properly with your car, it is worth verifying compatibility using the VIN and catalog numbers. This facilitates matching to a specific equipment version, transmission type, and installed accessories. In case of doubt, a good solution is to consult with a mechanic specializing in the BMW brand or use professional parts catalogs.

If you want to better understand how to safely buy used powertrains and what to pay attention to when selecting by VIN or OEM numbers, check out the guide Why it is worth buying used transmissions and engines – facts instead of myths, which discusses verification procedures and common mistakes made during purchase in detail.

Expanding your project within the BMW Engines category

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, units with smaller displacement, or alternative cylinder configurations, check out the available parts in the BMW Engines category.