BMW E81 E87 LCI E90 E91 E92 N43 N43B16AA Petrol Engine Block 7552789

Description

BMW E81 E87 LCI E90 E91 E92 N43 N43B16AA Petrol Engine Block is an original component from the Engine blocks category, designed for N43 petrol units used in popular BMW 1 and 3 series models. It serves as a solid foundation for professional engine repair or rebuilding, allowing you to maintain the factory performance characteristics of the powertrain.

Specifications and technical data

• SKU: 0439179
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0439179
• Substitutable numbers: 0439179, 11110439179, 7552789
• Fuel type: Petrol
• Category: Engine Blocks

Purpose and compatibility

The presented block is dedicated to the N43B16AA engine, used in petrol-powered BMW E81, E87 LCI, E90, E91, and E92 models. By maintaining the original geometry and factory mounting points, it provides the correct base for transferring accessories, the cylinder head, and other components from the existing unit.

Choosing an original block from this series allows for maintaining the structural integrity of the entire drivetrain, which translates into predictable engine behavior, proper cooling, and stable operation under full load conditions.

Technical characteristics of the block

The engine block from the N43 family has been designed for petrol fuel operation, taking into account high combustion temperatures and specific mechanical loads. The construction ensures adequate rigidity of the cylinder section, precise crankshaft guidance, and stable mounting of accessory components.

Key features of this type of block include optimized cooling and lubrication channels, which enable uniform heat dissipation and proper oil pressure throughout the system. As a result, after correct assembly and the use of appropriate accompanying components, it is possible to achieve repeatable engine performance parameters.

Application in engine repairs and rebuilding

This item from the Engine blocks category is particularly useful in situations where the previous block has suffered mechanical damage, overheating, or deformation. Using an original block as a base for an overhaul allows you to:

• restore factory mounting points for accessories and engine mounts,
• maintain proper alignment of the crankshaft and intermediate shafts,
• ensure correct compatibility with the stock transmission and drivetrain,
• minimize the risk of issues with fitting auxiliary components.

For workshops specializing in the BMW brand, such a block is a practical solution for comprehensive N43 unit overhauls, enabling economical engine rebuilding while maintaining high assembly repeatability.

Benefits of choosing an original BMW block

By choosing an original BMW engine block, you gain a component designed specifically for the target powertrain, without compromises regarding dimensions or the layout of oil and cooling channels. This is particularly important for modern petrol engines, where manufacturing and fitment tolerances are very strict.

A properly selected block also facilitates subsequent diagnostics – engine operating parameters remain in line with the manufacturer’s specifications, allowing for the reliable use of factory service procedures and data from diagnostic testers.

BMW engine blocks – expansion and modernization

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 housings, crankcases, or additional block sections, check out the available parts in the BMW engine blocks category.

When planning an overhaul of a petrol unit, it is also worth paying attention to elements affecting exhaust emissions and engine efficiency. To better understand the role of emission control systems and the rationale for using aftermarket components, read the article EGR: what it is and why it is worth considering used EGR valves, which discusses the practical aspects of operating and servicing modern internal combustion engines.