BMW E87 E90 E91 120i 320i 150HP Bare Engine N46B20B 60k 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 E87 E90 E91 120i 320i 150HP Bare Engine N46B20B 60k miles, WARRANTY is a used, complete bare petrol engine block, designed for popular 1 Series and 3 Series models. This is a solution for users looking for a technically compatible, factory-spec petrol engine for professional repair or engine replacement. By maintaining the original specifications, the engine remains consistent with the factory performance characteristics of BMW.

Specifications and technical data

• SKU: 0430933
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 430933
• Substitutable numbers: 11000430933, 430933, 11000391997, 0391997, N46B20B, N46B20BA, 11000430932, 0430932, 11000391996, 0391996
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Mileage: 59 000

Purpose and compatibility

The offered N46B20B bare engine block is dedicated to BMW 1 Series E87 and 3 Series E90 and E91 models in 120i and 320i versions with 150 HP. The unit's design was developed with dynamic driving in mind, while maintaining the refinement typical of BMW four-cylinder petrol engines. Using the original engine block allows for the preservation of correct mounting points, geometry, and factory operating parameters of the powertrain.

Technical characteristics of the unit

The engine belongs to the Engines category and represents a family of modern, inline BMW petrol units. The four-cylinder layout provides a balanced combination of performance and economy, and the use of petrol fuel promotes a smooth, predictable power delivery characteristic. The bare engine block serves as a base for further assembly with accessories, which facilitates the transfer of existing components from the previous unit and allows for configuration adjustments to a specific vehicle.

This type of solution is particularly beneficial in cases of severe mechanical damage to the existing engine, where reconditioning the block or cylinder head is not cost-effective. Replacing it with a complete bare engine block allows for shorter repair times and reduces the risk of additional problems resulting from extensive workshop repairs.

Condition, mileage, and practical application

The unit is used, which in practice means it has been removed from a vehicle and represents a real cost-effective alternative to a new engine. The declared mileage allows for assessing the degree of wear and selecting the appropriate scope of service activities before installation, such as replacing seals, checking the lubrication system, or verifying timing components. Thanks to this, the engine block can be prepared for further, trouble-free operation in the customer's car.

The N46B20B engine will work well both for standard engine replacement after a failure and for comprehensive vehicle restoration, where maintaining the original powertrain specification is key. Using a factory engine block also facilitates subsequent computer diagnostics and compatibility with the stock engine control unit.

Benefits of choosing an original BMW engine block

Choosing an original engine block from the N46 family ensures:

• preservation of the factory operating characteristics of the powertrain,
• proper fitment to mounts and the drivetrain in BMW E87, E90, and E91,
• the ability to use existing accessories from the previous engine,
• cost reduction compared to purchasing a new unit.

For workshops and individual users, this means a more predictable installation process and easier maintenance of consistency with the manufacturer's service documentation. The four-cylinder petrol engine remains a compromise between performance and operating costs, which is important for daily vehicle use.

BMW engines – further development and technical knowledge

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 power units, check out the available parts in the BMW Engines category.

To better plan your investment in a power unit and consciously choose the right engine block for your BMW 3 Series, it is worth familiarizing yourself with an analysis of typical faults and service costs – they are discussed in detail in the article Troublesome BMW E90 engines: check what can ruin your budget!, which helps assess the risks associated with operating specific engine versions.