BMW 1 3 Series e87 LCI e90 120i 320i Complete Engine N43B20A New Timing WARRANTY

Warranty and technical condition of the part

The engine is sold with a 90-day warranty.

The warranty covers the engine itself; engine accessories are covered by a 30-day warranty.

The power unit was tested before removal and is in full working order.

Listing details

The offer applies to a complete engine.

The engine comes from a right-hand drive (RHD) vehicle. The wiring harness is not compatible with left-hand drive (LHD) vehicles and requires replacement or modification.

BMW 1 3 Series e87 LCI e90 120i 320i Complete Engine N43B20A New Timing WARRANTY is a complete powertrain unit from the N43 family, designed for popular 1 and 3 Series models. This four-cylinder petrol unit ensures smooth operation, and the installation of a new timing system significantly enhances its performance and operational safety. It is an ideal solution for those seeking a technically refined engine for professional repair or replacement in their BMW.

Specifications and technical data

• SKU: 0427105-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 427105
• Substitutable numbers: 11000427105, 0427105, 11000427106, 0427106, 11002450324, 2450324
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Mileage: 59 000

Technical characteristics of the N43B20A unit

The presented engine belongs to the BMW N43 family of petrol units, designed for efficient combustion and high operational refinement. The four-cylinder layout provides balanced performance, and the design is tailored to the requirements of 120i and 320i models, ensuring proper compatibility with factory vehicle installations.

The engine is designed to run on petrol fuel, which allows for the characteristic BMW throttle response and flexibility across the entire rev range. The cylinder layout has been optimized to reduce vibration and noise, which is important for both daily city driving and long-distance travel.

New timing system – a key element of reliability

A significant advantage of this unit is the new timing system, which minimizes the risk of problems with the chain or timing gears typical of worn engines. In practice, this means:

• more stable engine operation across the entire rev range,
• reduced risk of costly failures associated with timing chain skipping,
• a greater safety margin during intensive use.

For workshops and end-users, the new timing system represents a real reduction in the risk of complaints and additional service downtime after installation.

Application in BMW 1 and 3 Series models

The N43B20A engine is intended for installation in popular BMW E81, E87, E90, E91, and E92 models in 120i and 320i versions. As a result, it provides a cohesive solution for a wide range of body styles – from the compact 1 Series to the more representative 3 Series. The unit's design is compatible with factory auxiliary systems, which facilitates integration with the vehicle's existing installation.

The unit falls under the Engines category, meaning it is prepared as a complete powertrain assembly rather than a single auxiliary component. This simplifies service planning and reduces the time required to restore the vehicle to full functionality.

Condition, mileage, and benefits of installation

The engine is offered as a used component with documented mileage, allowing for a better assessment of its service history. Low mileage combined with a new timing system is a beneficial combination for those who want to reduce the risk of typical N43 unit faults while maintaining reasonable repair costs.

The main benefits of installing this unit include:

• the ability to restore full powertrain functionality without the need for a major overhaul of the old engine,
• better predictability of future operation thanks to the replaced timing system,
• preservation of the original BMW driving characteristics, without the compromises typical of unsuitable replacements.

Technical support and knowledge about BMW E90 engines

Before deciding to replace the powertrain, it is worth knowing the typical weak points of the various engine versions used in the 3 Series. Practical information on this topic can be found in the article Troublesome BMW E90 engines – what can ruin your budget, which helps you make an informed choice regarding the right service solution and avoid recurring faults.

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 powertrain assemblies, check out the available parts in the BMW Engines category.