BMW E81 E88 E90 E91 Vacuum Pressure Tank 7799790

BMW E81 E88 E90 E91 Vacuum Pressure Tank is an original vacuum system component from the Vacuum pumps group, designed for BMW 1 and 3 series models. Engineered as part of the factory system, it ensures stable storage of the vacuum required for the proper operation of selected engine components and accessories.

Specifications and technical data

• SKU: 7799790
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7799790
• Substitutable numbers: 11657799790, 7799790
• Category: Vacuum Pumps

Purpose and function in the vacuum system

The presented vacuum tank works with the system generated by the vacuum pump, stabilizing pressure in the installation and reducing fluctuations during variable engine loads. In BMW E81, E88, E90, and E91 series vehicles, it is responsible for maintaining a vacuum reserve for pneumatically controlled components, which translates into predictable system response and proper operation of related parts.

Thanks to a design compliant with the manufacturer's standards, the tank maintains proper airtightness and resistance to typical engine bay operating conditions, such as temperature changes or vibrations. This solution helps reduce the risk of vacuum drops that could result in the malfunction of selected systems.

Benefits of using an original BMW vacuum tank

Using an original tank instead of a worn or leaking component allows for the restoration of factory vacuum system performance parameters. In practice, this means:

• more stable operation of the system working with the vacuum pump,
• reduced risk of errors related to insufficient vacuum,
• better repeatability of the response of vacuum-controlled components.

The original origin of the part promotes proper fitment to the installation in BMW E81, E88, E90, and E91 series models, which facilitates assembly and limits the need for additional modifications. This is particularly important when servicing systems where vacuum stability has a direct impact on comfort and operational safety.

Characteristics and vehicle fitment

As an element from the Vacuum pumps group, the tank has been designed to work with the factory BMW vacuum system. The design provides appropriate connection ports and geometry matched to the engine bay in the listed models, which facilitates proper routing of lines and maintenance of the original installation layout.

The product comes from the BMW brand, which means compliance with factory quality standards and control over the design and production process. As a result, the user receives a part that was intended to work in a specific environment and meets the vehicle manufacturer's requirements.

Condition of the component and installation recommendations

The vacuum tank is offered in used condition, which allows for an economical replacement of the component while maintaining the original specification. Before installation, it is recommended to perform a standard check of the vacuum system's airtightness and verify the lines and connectors to fully utilize the potential of the installed part.

When replacing, it is worth paying attention to the correct positioning of the tank in the engine bay and the proper connection of vacuum lines, in accordance with the factory diagram. Careful installation promotes long-term and stable system operation.

Expanding BMW vacuum system service

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as tanks, lines, or elements working with the pump, check the available parts in the BMW Vacuum pumps category.

During service work, it is also worth expanding your knowledge about related systems in the vehicle. In the context of diagnostics and component selection, an article describing the operating principles and maintenance of power supply components may be useful, available here: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.