BMW 1 3 Series E87 E90 118i 318i Bare Engine N43B20AY with 34k 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 1 3 Series E87 E90 118i 318i Bare Engine N43B20AY with 34k miles, WARRANTY is an original powertrain unit from the N43 family, designed for 1 Series and 3 Series petrol models. Thanks to its relatively low mileage and four-cylinder construction, it serves as an attractive base for a professional engine replacement in BMW vehicles equipped with this type of unit. This is a solution for users who expect consistency with factory specifications and wish to restore their vehicle to full operational efficiency.

Specifications and technical data

• SKU: 0427103-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 427103
• Substitutable numbers: 11000427103, 0427103, 11000427104, 0427104, 116i316i122HP, N43B20A, N43, N43B20
• Fuel type: Petrol
• Number of cylinders: 4
• Category: Engines
• Mileage: 34 000

Purpose and compatibility

The offered engine comes from the range of units used in BMW 1 Series E87 118i and BMW 3 Series E90 318i models from the N43 family. The design of this unit was developed for dynamic yet economical daily driving, while maintaining the characteristic refinement of a BMW petrol engine.

The engine belongs to the Engines category, meaning it is intended as the primary component of the drivetrain, and its design parameters are consistent with the manufacturer's factory specifications. This makes it a suitable choice when replacing a worn or damaged unit in vehicles equipped with the N43 engine.

Construction and technical characteristics

The N43B20AY powertrain is a four-cylinder petrol engine. This configuration provides a balanced combination of performance and fuel efficiency, as well as good refinement across typical RPM ranges. The four cylinders allow for precise control of the combustion process, which translates into predictable throttle response and stable operation throughout the entire usage range.

The N43 family engine was designed as a more modern construction compared to earlier naturally aspirated units, with an emphasis on energy efficiency and reduced fuel consumption. In practice, this means that with proper maintenance, it can provide the driver with a smooth, comfortable ride both in city traffic and on the highway.

Condition, mileage, and practical application

The presented engine is a used component, which in practice means it comes from an operated vehicle but retains parameters that allow for further use after proper installation and service verification. The declared mileage of the unit is relatively low for this generation of engines, making it an interesting proposition for those planning to use the car for a longer period after the drivetrain replacement.

Replacing the engine with a unit from the same family allows for maintaining compliance with the vehicle's factory configuration, which facilitates integration with the existing electrical installation, accessories, and control systems. For workshops specializing in the BMW brand, this is a beneficial solution as it limits the need for modifications and speeds up the installation process.

Benefits of using an original BMW engine

Choosing an original BMW N43 family powertrain offers a number of practical advantages:

• preservation of factory engine operating characteristics and predictable performance,
• consistency with the engine control system and other vehicle systems,
• easier diagnostics and service maintenance due to compliance with manufacturer documentation,
• the ability to restore the car to full efficiency after the failure of the previous unit.

For users who want to better understand the specifics of the units used in the 3 Series, a guide regarding the failure rates of selected engines in this model may be helpful – you can find a detailed discussion in the article Troublesome BMW E90 engines: check what can ruin your budget!.

If you are also interested in the impact of using original used components on the vehicle's future value, it is worth reading the guide material Original used parts and resale value – how not to lose money?, which discusses this issue from a practical perspective.

Expansion and selection of other elements from the BMW Engines group

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

Summary

BMW 1 3 Series E87 E90 118i 318i Bare Engine N43B20AY with 34k miles, WARRANTY is a used, original four-cylinder petrol unit designed for 1 Series and 3 Series models equipped with the N43 engine. For BMW owners and workshops specializing in this brand, it represents a practical solution for replacing a damaged drivetrain, allowing for the preservation of the vehicle's factory characteristics and ensuring continued, predictable operation of the car after the appropriate installation and inspection procedures are performed.