BMW E90 E91 E92 E93 LCI Air Conditioning A/C Pressure Pipe Hose Line N55 9221757

BMW E90/E91/E92/E93 LCI Air Conditioning Pressure Hose for the N55 engine is an original A/C system component, specifically designed for facelifted 3 Series models. As part of the Air Conditioning Hoses, Pipes, and Connectors group, it ensures a sealed and stable flow of refrigerant under high pressure, contributing to efficient air conditioning operation in demanding conditions.

Specifications and technical data

• SKU: 9221757
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9221757
• Substitutable numbers: 9221757, 64509221757, 52529410
• Part type: Hose
• Category: A/C Hoses & Fittings

Purpose and Function in the Air Conditioning System

This A/C pressure hose connects key components of the air conditioning system in BMWs with the N55 engine, responsible for the safe transport of refrigerant under the correct pressure. A properly selected hose:

• maintains the air conditioning system's seal under variable thermal and pressure loads,
• minimizes the risk of reduced cabin cooling performance,
• ensures stable operation of the compressor and other A/C components.

Thanks to its precise fit for the specific generation of facelifted BMW 3 Series with the N55 unit, the hose maintains the correct routing geometry, facilitating installation and reducing stress within the system.

Original Origin and BMW Fitment

The hose was designed by BMW as part of the air conditioning system dedicated to the E90/E91/E92/E93 facelift platform. This means:

• factory-perfect fit for mounting points and connectors in the engine bay,
• compatibility with the operating parameters of the compressor and other A/C components,
• preservation of the original hose routing, which reduces the risk of chafing and leaks.

As an original BMW part, the hose meets the manufacturer's requirements for pressure resistance, temperature resistance, and compatibility with the factory refrigerant used in these models.

Performance Characteristics and Benefits of Use

Choosing an original air conditioning pressure hose for the facelifted BMW 3 Series with the N55 engine ensures the integrity of the entire A/C system. In practice, this means:

• stable air conditioning operation at high ambient temperatures,
• reduced risk of failures due to mismatched aftermarket parts,
• easier diagnostics and servicing in the future due to the use of OEM parts.

This component is particularly important for repairs after system leaks, compressor replacement, or A/C system upgrades, where certainty regarding sealing and resistance to operating pressure is required.

Product Condition and Service Application

The hose is a used original part, offered as a used original component, providing a sensible compromise between repair cost and maintaining factory quality. This type of part is suitable for:

• air conditioning system repairs after refrigerant leaks,
• restoring the original A/C configuration after incorrect modifications,
• servicing vehicles where preserving OEM components is a priority.

Prior to installation, standard service procedures are recommended, including checking the entire system for leaks and proper refrigerant filling according to BMW guidelines.

Related Components and Service Knowledge

If you are planning a comprehensive repair or upgrade of the air conditioning system area in your BMW and need other components from the same group, such as low-pressure hoses, flexible hoses, or service connectors, check the available parts in the BMW Air Conditioning Hoses, Pipes, and Connectors category.

When planning repairs using dismantled parts, it is worth familiarizing yourself with best practices for selecting and verifying premium components – this is described in more detail in an article on our blog: used Mercedes parts – original dismantled components and repair cost-effectiveness, whose tips can be analogously applied when working with the BMW brand.