BMW 1 Series E81 E87 LCI Diesel N47 Air Conditioning Line Suction Line 4250403

BMW 1 Series E81 E87 LCI Diesel N47 Air Conditioning Line Suction Line is an original cabin cooling system component designed for BMW models with a Diesel engine. It enables efficient refrigerant flow, ensuring stable air conditioning operation and thermal comfort inside the vehicle. This is a practical solution for users seeking factory fitment and reliable compatibility with the air conditioning system.

Specifications and technical data

• SKU: 9209741-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 4250403
• Substitutable numbers: 64504250403, 4250403, 64509209741, 9209741, 64509227449, 9227449, 64509223317, 9223317
• Fuel type: Diesel
• Category: A/C Hoses & Fittings

Purpose and function in the air conditioning system

The air conditioning line in BMW 1 Series E81, E87 LCI, and E88 models is responsible for transporting refrigerant between the individual components of the system. A properly selected air conditioning pipe helps maintain system tightness, correct operating pressure, and stable cooling performance, which translates into comfortable operation of the entire system.

This item from the Air conditioning lines, hoses, and connectors category is particularly important in vehicles with a diesel engine, where the air conditioning system often operates under varied thermal and pressure conditions. The appropriate geometry and diameter of the line support correct refrigerant circulation and cooperation with the compressor, condenser, and evaporator.

Compatibility with BMW Diesel models

The presented line has been designed with the specific configuration of Diesel power units in compact BMW models in mind. This means it matches the factory routing of the installation in the engine bay, features appropriately shaped connections, and maintains the required clearances from other components.

Thanks to this, installation proceeds in a manner similar to the factory process – without the need for modifications, creating new mounts, or altering the line's routing. Such a solution reduces the risk of leaks, collisions with other elements, and improper loading of the air conditioning compressor.

Characteristics of the used OEM component

The offered air conditioning line is a used part, sourced from dismantling, which allows for maintaining the original BMW specification while reducing repair costs. Compared to aftermarket replacements, the OEM component ensures proper fitment to brackets, supports, and factory connectors, which is important for both durability and the safety of the system's operation.

In practice, this means:

• preservation of the factory line geometry and mounting points,
• compatibility with original air conditioning connectors,
• reduction of the risk of stress and micro-cracks resulting from improper line positioning.

Benefits of using an original air conditioning line

Using an original air conditioning line in a BMW with a diesel engine brings a number of practical service and operational benefits:

• Stable system operation – proper refrigerant flow and matched diameters minimize pressure drops and compressor load.
• Better connection tightness – factory ends and connectors reduce the risk of refrigerant leaks.
• Time savings during installation – no need to adjust the length or shape of the line.
• The ability to maintain a configuration consistent with BMW service documentation.

For workshops and individual users, this means a more predictable repair process and a lower risk of needing to intervene in the air conditioning system again shortly after.

BMW air conditioning system expansion and related components

If you are planning a comprehensive repair or upgrade of the air conditioning zone in your BMW and need other elements from the same group, such as additional lines, flexible hoses, or service connectors, check the available parts in the BMW air conditioning lines, hoses, and connectors category.

In the case of extensive cabin cooling system repairs or restoring full air conditioning efficiency, it is also worth considering the use of used, original premium-class components. You can find more about the cost-effectiveness of this approach and selecting components from dismantling in the article Used parts for Mercedes – original parts from dismantling, which discusses the practical aspects of using branded elements at a reasonable price.

Summary

BMW 1 Series E81 E87 LCI Diesel N47 Air Conditioning Line Suction Line is a functional, original air conditioning system component designed for vehicles with a Diesel engine. It ensures factory fitment, correct refrigerant flow, and supports the maintenance of thermal comfort inside the car. It is a sensible choice for drivers and workshops that prioritize compliance with BMW construction and a predictable repair result.