BMW F20 F21 M135i F22 M235i Bare Engine N55 N55B30A with 89k 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 F20 F21 M135i F22 M235i Bare Engine N55 N55B30A with 89k miles, WARRANTY is a factory-spec, inline powertrain from the N55 family, designed for the sporty 1 and 2 Series models. It is offered as a bare engine block, providing a solid foundation for professional repair or engine swaps in BMW vehicles equipped with the N55B30A unit. This is an ideal solution for users looking for a technically compatible, used six-cylinder gasoline engine.

Specifications and technical data

• SKU: 2286629
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2286629
• Substitutable numbers: 2286629, 11002286629, 2286630, 11002286630, 2334333, 11002334333, 5A635D7, 11005A635D7, 2334332, 11002334332
• Fuel type: Petrol
• Number of cylinders: 6
• Category: Engines
• Engine code: N55B30A
• Mileage: 59 000

Purpose and compatibility of the N55B30A unit

The presented engine block is dedicated to BMW F20/F21 M135i and BMW F22 M235i models, which are factory-equipped with the N55B30A unit. This inline six-cylinder gasoline engine is highly regarded for its smooth operation, flexibility, and potential for further customization of peripherals according to the user's or workshop's requirements.

As a bare engine, this component serves as a base for transferring existing peripherals from a damaged engine or building a complete system according to the vehicle's specifications. This approach allows for consistency with the factory configuration while giving the workshop full control over the selection of components.

Construction, design parameters, and fuel

The engine belongs to the Engines category and represents BMW's characteristic inline six-cylinder layout. This architecture ensures smooth power delivery, good mechanical balance, and predictable behavior under load, which is particularly important in the M135i and M235i versions.

The unit runs on gasoline, which contributes to its dynamic characteristics and quick revving. The N55B30A engine code allows for clear identification of the construction type and is crucial when selecting peripherals, the engine control unit (ECU), and other drivetrain components.

Practical application and advantages of a bare engine

A bare engine is particularly beneficial in situations where:

• the existing block or cylinder head has suffered mechanical or thermal damage,
• the workshop plans to use existing, verified peripherals from the previous unit,
• it is necessary to maintain a specific equipment configuration according to the VIN.

This approach enables the optimization of repair costs while maintaining a high level of control over the condition and origin of the installed parts. A used engine block also helps reduce vehicle downtime, as the key structural component is already prepared for further assembly work.

Condition, identification, and selection by engine code

The offered product comes from the BMW brand and is classified as a used part, which in practice means it has been in operation in a vehicle but is still suitable for further use after proper installation and verification by a workshop. The N55B30A code facilitates clear matching to a specific model version and minimizes the risk of structural incompatibility.

When selecting an engine, it is worth paying attention to the compatibility of the unit code, fuel type, and number of cylinders with the vehicle's factory specifications. Additionally, available part numbers and interchangeable numbers are helpful, allowing for precise comparison with service documentation or manufacturer catalogs.

Technical support and additional information

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other components from the same group, such as blocks, heads, or complete power units, check out the available parts in the BMW Engines category.

For users considering the installation of a used engine or transmission, an expert guide discussing facts and myths, procedures for selection by VIN and OEM, and cost analysis will be particularly useful – you can find it in the article "Why it is worth buying used transmissions and engines – facts instead of myths".

If you want to go through the process of choosing the right power unit, assessing its condition, and verifying the seller step-by-step, a practical guide available in the material "How to buy a used car engine and not get scammed – a step-by-step guide" will be helpful.