BMW Air Conditioning A/C Filler Valve Suction Line Cap Cover Small 9287978

BMW Air Conditioning A/C Filler Valve Suction Line Cap Cover Small is a precision A/C system component that protects the service port from contaminants and mechanical damage. The original BMW cap ensures proper sealing of the service port, supporting the airtightness and long-term, stable operation of the air conditioning system. Thanks to its compact design, this small cover fits perfectly into the factory engine bay architecture.

Specifications and technical data

• SKU: 9287978
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9287978
• Substitutable numbers: 9287978, 07149287978
• Category: Caps

Purpose and technical function

The presented cap is a component designed to protect the filler valve on the suction line of the air conditioning system in BMW vehicles. Its purpose is to:

• shield the service port from dust, moisture, and small contaminants,
• protect the valve from accidental mechanical damage,
• maintain order and clarity within the A/C installation during service.

By using an original cap, consistency with the factory air conditioning system design is maintained, which facilitates service and diagnostics.

Construction and fitment to the air conditioning system

The small filler valve cover has been designed as a plug-and-play component, meaning its installation involves direct placement onto the suction line service port. The cap's design ensures:

• stable hold on the valve without the need for additional modifications,
• ergonomic shape for easy removal during A/C system maintenance,
• compatibility with factory connectors used in BMW air conditioning installations.

The properly selected geometry of the component allows for secure seating in the intended location, without play or unwanted stress.

Characteristics of the original BMW part

As an original BMW cap, this component complies with the manufacturer's factory standards regarding dimensions, tolerances, and materials. Using a part from the same design line as other air conditioning system components translates into:

• certainty of fitment to the suction line and filler valve,
• consistency with the existing engine bay architecture,
• easier identification in BMW service documentation.

This solution is particularly recommended for repairs where maintaining the original vehicle specification and predictable A/C system performance over the long term is essential.

Condition, service application, and benefits of installation

The item comes from the used market, making it an attractive option for economical air conditioning system repair while maintaining the original origin of the part. This type of cap is suitable both for replacing a missing cover and for tidying up the installation after previous service interventions.

The main benefits of using this cap include:

• protection of the filler valve from external factors,
• maintaining a clear, organized layout of air conditioning lines,
• reducing the risk of service issues resulting from port contamination.

Related items and additional information

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 covers, caps, or additional trims, check out the available parts in the BMW Caps category.

For users interested in a broader context of design differences between standard and sports versions, including cooling and braking systems, an article describing the characteristics of RS models may be helpful – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.