BMW 1 3 er F20 F21 F30 LCI Refrigerant Pressure Line Double Pipe Hose 9337126

BMW 1 3 er F20 F21 F30 LCI Refrigerant Pressure Line Double Pipe Hose are original cabin cooling system components designed for the 1 and 3 series models after the facelift. Thanks to their factory fitment, they ensure proper refrigerant flow as well as stable operation of the compressor and other components. Using this OEM component allows for an economical yet technically correct repair of the air conditioning system in your BMW.

Specifications and technical data

• SKU: 9337126
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9337126
• Substitutable numbers: 64539337126, 9337126
• Category: A/C Hoses & Fittings

Purpose and function in the air conditioning system

The air conditioning lines in BMW F20, F21, and F30 LCI models are responsible for the tight and safe routing of the refrigerant between the compressor, condenser, evaporator, and receiver-drier. The appropriate diameter, geometry, and factory connectors guarantee:

• stable operating pressure throughout the entire circuit,
• proper heat exchange in individual sections of the system,
• correct cooperation with expansion valves and pressure sensors,
• reduction of vibrations and stress thanks to the fitment to the body mounts.

Original lines, compliant with BMW factory specifications, minimize the risk of leaks and issues with system venting after service.

Construction, connectors, and compatibility

The element belongs to the Air conditioning lines, hoses, and connectors group, which means it was designed as an integral part of the interior cooling system. The construction includes:

• sections of rigid pipes matched to the geometry of the engine bay and body,
• flexible hose segments compensating for the movement of the power unit,
• factory connectors enabling a tight connection with other air conditioning components,
• sealing surfaces adapted to work with the appropriate type of refrigerant.

Thanks to maintaining the original mounting geometry, the lines fit the factory brackets and clamps, which facilitates service and reduces the risk of chafing during operation.

Benefits of using original BMW lines

Using original air conditioning lines in a BMW F20/F21/F30 LCI brings a number of practical benefits:

• Factory fitment – no need for modifications, drilling, or custom mounts.
• Consistency with other system elements – the lines work with original sensors, the compressor, and the condenser.
• Stable air conditioning operation – proper refrigerant flow translates into even cabin cooling.
• Reduced risk of leaks – factory connectors and seals are designed for specific operating pressures.

A used OEM element is a reasonable choice for repairs where both technical correctness and service cost control are important.

Condition, verification, and practical application

The air conditioning lines come from dismantling and are offered as a verified, used component. This type of part allows for restoring full system functionality in situations where there has been mechanical damage to the line, corrosion of connectors, or leaks after a collision. Before installation, a standard service procedure is recommended: leak testing, replacing seals at connection points, and performing a vacuum and recharge of the system in accordance with the vehicle manufacturer's recommendations.

For users considering broader use of used components in premium class cars, valuable information on selecting and operating such elements can be found in the article: Used parts for Mercedes – original components from dismantling.

Expanding the air conditioning system in a BMW

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 category BMW air conditioning lines, hoses, and connectors.

When planning larger modifications or projects involving used components, it is also worth reading the guide on common mistakes when buying tuning parts: buying used car parts and pitfalls when choosing components for modifications.