BMW 3 Series E46 318i Petrol N42 143HP Bare Engine N42B20A New Timing 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 3 Series E46 318i Petrol N42 143HP Bare Engine N42B20A New Timing WARRANTY is a used, bare engine block with a new timing chain system, designed for 143HP units. This is a solution for users looking for a technically verified base for renovation or replacement in the powertrain area, while maintaining the original BMW engine performance characteristics. Thanks to its four-cylinder configuration and petrol fuel system, the unit ensures the refinement and predictable behavior under load typical for this series.

Specifications and technical data

• SKU: 0391085-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0391085
• Substitutable numbers: 11000391085, 0391085, 11000304935, 11007519601, 11007516422, 11000391086, 11000304936, 11007519602, 11007516423, 0304935, 7519601, 7516422, 0391086, 0304936, 7519602, 7516423
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Mileage: 59 000

Purpose and technical characteristics

The presented engine block is dedicated to the BMW 3 Series E46 318i model with the 143HP N42B20A unit. The design, based on four cylinders and petrol supply, allows for maintaining factory powertrain performance parameters while simplifying the installation process in place of a worn or damaged unit.

The engine is offered as a so-called bare engine, which means it serves as a solid base for further assembly of accessories according to the requirements of a specific vehicle configuration. This form is particularly beneficial for workshops and users who plan to transfer functional accessories from their existing unit or use new auxiliary components.

New timing system and operational benefits

A significant advantage of this unit is the new timing system, which significantly reduces the risk of typical failures associated with worn valve train components. In the case of N42 family engines, the proper condition of the timing system is crucial for stable operation, correct valve timing, and the mechanical safety of the entire system.

The new timing system translates into:

• more predictable operation across the entire rev range,
• reduced risk of costly mechanical failures,
• better conditions for further diagnostics and tuning of the unit after installation.

Condition, mileage, and practical application

The engine comes from a used vehicle, with the declared mileage of the unit being relatively low for this generation, making it an attractive base for further operation. This type of bare engine is particularly recommended in situations where the existing unit has suffered serious mechanical damage or repairing the block is economically unjustified.

In practice, installing such an engine allows you to:

• restore full powertrain efficiency in a BMW 3 E46 318i without the need to purchase a new assembly,
• maintain the original specification of the vehicle's power unit,
• plan further service work (e.g., accessory replacement) in a controlled manner.

Compatibility and identification

The unit is assigned to the Engines category and is intended for BMW vehicles, which facilitates selection in the context of repair or replacement within the same model platform. The engine has an assigned OEM part number and a set of interchangeable numbers, which allow for precise verification of compatibility with a specific vehicle unit in the manufacturer's catalogs or service software.

Before purchasing, it is recommended to compare vehicle data (engine code, production year, equipment version) with catalog information to ensure full mechanical and installation compatibility. In case of doubt, it is worth consulting the choice with a workshop specializing in the BMW brand or with the seller's technical department.

BMW engines – expansion and additional information

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other elements from the same group, such as blocks, cylinder heads, or complete engines, check the available parts in the BMW Engines category.

For users interested in a broader context of BMW power unit operation, including potential weak points and repair costs, the following guide may be useful: Troublesome BMW E90 engines: check what can ruin your budget!. It allows you to better plan service and consciously approach the selection and further maintenance of the engine.