BMW E60 E81 E87 E90 E91 Cap Oil Power Steering Pump Expansion Tank Label 2122171

BMW E60 E81 E87 E90 E91 Cap Oil Power Steering Pump Expansion Tank Label is an original lubrication system component designed for BMW 1, 3, and 5 series models. Thanks to its factory design, the cap ensures a tight seal for the oil reservoir and stable operating conditions for the engine. This is a practical solution for users who want to maintain consistency with the manufacturer's factory standards and avoid issues resulting from the use of low-quality replacements.

Specifications and technical data

• SKU: 2122171
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 2122171
• Substitutable numbers: 71212122171, 2122171, 71210406611, 0406611, 71210302695, 0302695, 32416851332, 6851332, 32410141427, 32411128332, 0141427, 1128332
• Category: Other Engine Parts

Purpose and function of the BMW oil reservoir cap

The oil reservoir cap in BMW E60, E81, E87, E90, and E91 models is responsible for maintaining the tightness of the lubrication system and protecting the oil from external contaminants. A properly selected component minimizes the risk of leaks, thereby reducing the possibility of oil level drops and potential engine damage. Using an original BMW design allows for maintaining the correct operating parameters of the engine and compliance with the manufacturer's factory requirements.

Original origin and compatibility

The presented cap is a part from the BMW OE group, which means it was designed with specific technical solutions used in E60, E81, E87, E90, and E91 models in mind. The appropriate shape, thread, and sealing method are matched to the stock covers and oil reservoirs used in these BMW generations. As a result, this component can be used both as a replacement for a damaged cap and as part of preventive maintenance during service work.

Characteristics of the used component

The offered oil reservoir cap is a used part, sourced from dismantling. Such OEM components are frequently chosen by workshops and individual users because they allow for maintaining the vehicle's original specification while reducing costs. Unlike many cheap replacements, the used cap retains its factory geometry and operation, which is important for long-term tightness and correct installation.

Benefits of using an original BMW cap

Using this component in a BMW E60, E81, E87, E90, or E91 brings a number of practical benefits:

• preservation of the factory manufacturing standard characteristic of BMW OE parts,
• secure fit to stock covers and oil reservoirs in the listed models,
• reduced risk of leaks compared to random replacements,
• possibility of economical repair using a used OEM component.

Application in service and operation

This type of oil reservoir cap is suitable for both standard service maintenance and repairs resulting from damage or wear of the previous component. It can be used in vehicles driven daily, where reliability and compliance with factory solutions are important. Choosing an original BMW component helps maintain the integrity of the entire lubrication system and facilitates future diagnostics and technical maintenance.

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 caps, reservoirs, or small mounting elements, check the available parts in the Other BMW category.

For users interested in comparing the characteristics of sports engines with solutions used in standard versions, an article discussing the differences in the construction of engines, braking systems, and chassis may be helpful – you can find it here: Audi RS vs other models – what is hidden under the hood and chassis?.

If you want to better understand how the use of used OEM parts affects vehicle downtime in the workshop and service costs, it is worth reading our guide material: Availability of car parts off the shelf vs repair time – how do used OEM parts shorten workshop stays?.