BMW E81 E87 E90 E91 LCI Oil Carrier Radiator Return Line Hose Pipe

BMW E81 E87 E90 E91 LCI Oil Carrier Radiator Return Line Hose Pipe is an original hydraulic system component by BMW, designed for use in popular 1 and 3 series models. This used, factory-spec reservoir ensures proper storage of the operating oil, which translates into stable system performance and predictable vehicle behavior. It is a practical solution for users seeking a proven part with a design compliant with the OEM standard.

Specifications and technical data

• SKU: 6768094-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 6850582
• Substitutable numbers: 32416850582, 6850582, 32416764791, 6764791, 32416773909, 6773909, 32416768094, 6768094, 32416851218, 6851218, 32416774305, 6774305, 32416764794, 6764794, 32416771063, 6771063, BG
• Category: Other Engine Parts

Purpose and function of the BMW oil reservoir

BMW E81 E87 E90 E91 LCI Oil Carrier Radiator Return Line Hose Pipe acts as a reservoir for the oil used in the vehicle's system, allowing for its safe storage and circulation. The properly designed housing helps maintain the correct level of the operating medium, and the matched connection ports facilitate integration with the existing installation. As a result, this element can be used as a replacement for the factory reservoir in BMW vehicles of the given generation without the need for system modifications.

Benefits of using an original BMW component

Choosing an original BMW oil reservoir primarily means compatibility with the factory system and predictable component behavior during long-term operation. A design consistent with the vehicle manufacturer's specifications means:

• proper fitment to mounts and hoses in the engine bay,
• preservation of the factory oil flow geometry,
• consistency with other hydraulic system components.

For the user, this means reducing the risk of leaks and assembly problems, as well as maintaining system operating parameters at a level close to factory solutions. A used, original component can be an attractive alternative to cheaper replacements with uncertain specifications.

Selection and compatibility with part numbers

The presented reservoir has an assigned OEM part number and associated interchangeable numbers, which facilitates precise identification of the element in BMW catalogs and parts selection systems. This allows for verifying the compatibility of the reservoir with a specific engine version and model year, minimizing the risk of purchasing an incorrect component. If necessary, it is worth comparing the markings on your current part with the data in the product specification or consulting a mechanic.

Condition, installation, and practical application

The item is offered as a used part, which allows for reducing repair costs while maintaining the original BMW design. Before installation, a standard visual inspection, external cleaning, and – if necessary – flushing the inside of the reservoir with an appropriate agent to remove any residues of old oil are recommended. A correctly selected and installed reservoir supports stable system operation, reduces the risk of air entrapment, and facilitates subsequent monitoring of the operating medium level.

System expansion and related parts

If you are planning a comprehensive repair or upgrade of the engine bay area in your BMW and need other elements from the same group, such as additional reservoirs, hoses, or mounts, check the available parts in the Other BMW category.

When planning broader service work on premium segment cars, it is also worth paying attention to the design differences between individual model lines and high-performance versions – this topic is discussed in more detail in the article Audi RS vs other models – what is hidden under the hood and chassis?, which helps to better understand the importance of proper component selection.

If you are interested in a broader context of using used OEM elements in premium cars, it is also worth reading the market analysis in the material Crisis in the new parts market? Why in 2026 used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend, where the economic and technical advantages of such a solution are discussed.