BMW E81 E87 LCI E90 E91 120i 320i N43 Bare Engine N43B20AA 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 E81 E87 LCI E90 E91 120i 320i N43 Bare Engine N43B20AA New Timing WARRANTY is an original power unit from the N43 family, designed for 1 and 3 series models. This compact petrol engine with four cylinders serves as a solid base for replacing a worn-out unit or for professional powertrain repairs. Thanks to its verified mileage and factory-specific design, it is an attractive option for users looking for a proven service solution.

Specifications and technical data

• SKU: 0427105-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 0427105
• Substitutable numbers: 11000427105, 0427105, 11000427106, 0427106, 11002450324, 2450324, N43, N43B20, N43B20A
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Mileage: 59 000

Technical characteristics of the N43B20AA engine

The presented engine belongs to the N43 family, which consists of modern, four-cylinder petrol units from BMW. The use of petrol fuel combined with a compact design ensures smooth operation, predictable torque characteristics, and easy integration with the vehicle's factory electronics. The four-cylinder inline layout promotes ease of maintenance and clear access to accessories during installation and subsequent inspections.

The N43B20AA engine was designed for daily use in 120i and 320i models, where a balance between performance and fuel economy is essential. The unit works well with both manual and automatic transmissions, allowing for flexible adaptation to the configuration of a specific BMW vehicle.

Application in BMW E81, E87 LCI, and E90 models

This power unit is dedicated to popular BMW 1 and 3 series models, such as the E81, E87 LCI, and E90 in 120i and 320i versions. This means that the design of the block, cylinder head, and mounting points has been developed for trouble-free installation in these bodies, maintaining factory support points and compatibility with standard wiring harnesses.

As a result, the engine can be used both as a replacement element in the event of a major failure of the existing unit and as a base for a comprehensive powertrain rebuild in a restoration project. The Engines category in this case refers to a complete power unit, which is the central element of the entire drivetrain.

Condition, mileage, and benefits of installing a used engine

The offered engine comes from the secondary market, which allows for a significant reduction in repair costs compared to a brand-new unit. The declared mileage is important information for informed users who want to assess the potential for further operation. A used BMW N43B20AA engine can be a good choice for those who:

• plan to replace a damaged unit while maintaining a reasonable budget,
• want to restore full powertrain efficiency without interfering with the vehicle's original specifications,
• are looking for an engine consistent with BMW factory solutions, without the need to adapt non-standard components.

Before installation, a standard service procedure is recommended, including replacing consumables and checking key components, which further increases safety and predictability of future operation.

Why choose an N43 family unit for your BMW

Engines from the N43 family were developed specifically for modern BMW models, ensuring consistent cooperation with factory control systems, OBD diagnostics, and safety systems. By choosing the BMW N43B20AA petrol engine, you gain:

• preservation of the car's original characteristics (throttle response, smooth operation, sound),
• easier diagnostics and service thanks to the wide availability of technical knowledge about this unit,
• the possibility of using existing accessories, provided their condition allows it and it is in accordance with the manufacturer's recommendations.

This solution is particularly attractive for users who want to keep their BMW E81, E87 LCI, or E90 in a configuration close to the factory state, without experimenting with non-original conversions.

BMW engines – expansion and powertrain modernization

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

Before purchasing a used engine for a BMW E90, it is worth familiarizing yourself with the typical problems and weak points of individual units. A practical overview of the most common failures and tips on how to avoid costly mistakes when choosing can be found in the article Troublesome BMW E90 engines: check what can ruin your budget!. This will help you better assess how to prepare for the installation of the N43B20AA unit and how to plan for its future operation.