BMW F20 F21 F30 F31 LCI M140i 340i B58 Oil Return Line Pipe 7643176

The BMW F20 F30 M140i 340i B58 Oil Line Pipe is an original equipment lubrication system component in the turbocharger and parts category, designed for use in the B58 engines used in the BMW 1 Series F20 and 3 Series F30 models. This OEM part allows you to maintain factory engine and turbocharger performance while reducing service costs.

Specifications and technical data

• SKU: 7643176
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7643176
• Substitutable numbers: 11427643176, 7643176
• Category: Turbos & Parts

Purpose and function of the BMW B58 oil hose

The oil pipe/line is responsible for supplying lubrication to the components interacting with the turbocharger in the B58 engine, which is crucial for the durability of the rotor, bearings, and oil pressure stability. A properly selected, original line minimizes the risk of leaks, pressure drops, and component overheating.

In the case of the M140i and 340i units, where the engine operates under higher loads, proper oil flow is particularly important both in everyday use and during more dynamic driving or modifications that increase power.

Design, fit and OEM benefits

Original BMW workmanship means maintaining the factory line geometry, properly selected diameters, and mounting points. This ensures the oil pipe fits correctly in the engine compartment, avoids interference with other components, and works with the turbocharger accessories as intended by the manufacturer.

The key benefits of using an original oil line include:

• Precise fit for the B58 engine lubrication system in F20 and F30 models, no modifications required.
• Stable oil flow to the turbocharger, which supports smooth operation and reduces the risk of premature wear.
• Compatibility with factory mountings, which facilitates installation and service in workshop conditions.

Used condition and service use

This oil line pipe is in used condition, allowing for cost-effective repair or replacement of the component in BMW vehicles with the B58 engine. This type of part is particularly useful for:

• turbocharger service or regeneration,
• removing leaks in the lubrication system around the turbo,
• restoring the factory configuration after previous modifications.

Choosing a used OEM part is a reasonable compromise between quality and cost, especially in cars that are used intensively or undergo mechanical modifications.

BMW oil pipe for tuning and increasing power

When improving the performance of a B58 engine – whether through software changes or hardware modifications – a functioning turbocharger oil line is crucial to the safety of the entire setup. Maintaining proper turbo lubrication reduces the risk of overheating, seizure, and performance degradation under prolonged load.

If you're planning modifications to your BMW M140i or 340i, it's worth familiarizing yourself with practical tips on selecting and using used components. For a detailed discussion, see the article "How to Increase Engine Power – A Practical Guide to Engine Tuning with Used Parts ," which will help you better plan your work and select the right components.

Other turbochargers and parts for BMW

If you are also looking for other components from the turbochargers and parts category for BMW, check out our dedicated offer, where you will find a wide selection of turbocharger components, oil lines and accessories: turbochargers and parts for BMW .

Summary

The BMW F20 F30 M140i 340i B58 Oil Line Pipe is a used, original turbocharger and parts part designed for the B58 engine lubrication system. It ensures factory fit, proper oil flow to the turbocharger, and provides a functional solution for both standard service and performance upgrade projects.