BMW E46 M3 S54 Engine Bare S54B32 326S4 343HP 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 M3 S54 Engine Bare S54B32 326S4 343HP WARRANTY is an original, used bare engine block from the iconic BMW petrol unit, designed for demanding users looking for a proven base for a rebuild or a swap. The bare engine configuration allows for flexible use of existing ancillaries and tailoring the engine to a specific vehicle specification, while maintaining the characteristic properties of the high-revving S54. This is a solution for those who want to recreate factory parameters in a controlled manner or prepare a project with a distinctly sporty profile.

Specifications and technical data

• SKU: 0304348
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0304348
• Substitutable numbers: 11000304348, 0304348, 11000154617, 0154617, 11007831913, 7831913, 11000304349, 0304349, 11007831914, 7831914, 11000154618, 0154618
• Fuel type: Petrol
• Number of cylinders: 6
• Category: Engines
• Mileage: 87 000

Technical characteristics of the S54 bare engine

The presented bare engine belongs to the Engines category and is intended for the S54B32 unit used in the BMW E46 M3. The design, based on an inline six-cylinder layout, ensures characteristic refinement and linear power delivery, valued in both road and track applications. The use of petrol fuel allows for precise tuning and the exploitation of the high RPMs for which this unit is famous.

The bare engine provides a solid base for further configuration – the user can use their own ancillaries, wiring harness, ECU, and auxiliary components, maintaining full control over the scope of work and budget. This form of delivery is particularly beneficial for projects where the replacement or upgrade of ancillaries is already planned.

Application in BMW E46 M3 and swap projects

The S54 engine in the bare block version is primarily intended for the BMW E46 M3, where it serves as the core element of the drivetrain with a distinctly sporty character. Thanks to its design and parameters, it also works perfectly as a base for swaps in other BMW models where high power, fast throttle response, and stability at high RPMs are the priority.

The used bare engine allows for:

• recreating the factory specification of the S54 unit in the E46 M3,
• building an engine after a full overhaul using new internal components,
• realizing track or track-day projects with individual selection of ancillaries.

By maintaining the original six-cylinder architecture, the user receives a foundation for a high-efficiency drivetrain with predictable behavior.

Condition, mileage, and potential for further work

The offered bare engine is a used item, which in practice means it is a good base for verification, service, or a full overhaul before installation in the target vehicle. The declared mileage of the unit allows for conscious planning of the workshop work scope – from a basic inspection to a comprehensive rebuild according to individual project assumptions.

This approach is particularly beneficial for those who want to have full control over the internal condition of the engine, select components according to their own preferences (e.g., bearings, seals, timing components), and achieve a predictable result in terms of both durability and performance.

Selection by OEM numbers and technical support

For proper fitting of the bare engine to a specific car configuration, it is crucial to verify compatibility by OEM number and interchangeable numbers. In this product, this information is available in the technical specification, which facilitates comparison with data from the manufacturer's catalog or vehicle documentation. In case of doubt, it is worth using the VIN and OEM selection procedures described in specialized guides.

If you want to better understand how to safely and consciously buy used power units, the expert article Why it is worth buying used gearboxes and engines – facts instead of myths will be useful, where typical concerns, real risks, and the proportions of purchase costs and potential service are discussed.

Additionally, to go through the process of verifying compatibility by numbers step by step, you can use the practical guide how to choose the right car part by VIN and OEM number, which contains a list of questions for the seller and a parameter control scheme.

Expanding the project 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 additional blocks, cylinder heads, or other bare engine configurations, check the available parts in the BMW Engines category.

Such an approach allows you to build a coherent project based on components from one brand, facilitates servicing and subsequent diagnostics, and increases the chances of maintaining full mechanical and assembly compatibility within the drivetrain.