BMW F20 F21 F30 LCI Oil Feed Line Pipe M140i 340i B58 Engine 7643175

BMW F20 F21 F30 LCI Oil Feed Line Pipe M140i 340i B58 Engine is an original component from the Lines, hoses and pipes group, designed for the turbocharger lubrication system in B58 units. It ensures a stable oil supply to the turbocharger, which translates into safe engine operation and the maintenance of factory performance parameters.

Specifications and technical data

• SKU: 7643175
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7643175
• Substitutable numbers: 7643175, 11427643175
• Category: Hoses, Lines & Pipes

Purpose and function in the lubrication system

The turbocharger oil feed line in BMW F20 and F30 series models with the B58 engine is responsible for the controlled flow of oil between the engine's lubrication system and the turbocharger. A properly selected and leak-free line:

• maintains the correct oil pressure within the turbocharger,
• reduces the risk of overheating the rotor and bearings,
• minimizes the possibility of leaks in the hot zone of the power unit,
• supports the durability of the entire forced induction system.

By maintaining the factory geometry and internal diameter, the line allows for stable turbocharger operation across the full load range, which is particularly important in high-performance versions such as the M140i and 340i.

Construction and fitment for BMW F20 / F30 with B58 engine

The component was designed by BMW for precise oil routing in the engine bay, taking into account high temperatures and limited installation space. The properly shaped pipe and flexible sections ensure:

• secure routing of the line while maintaining required bending radii,
• compatibility with factory mounting points in the F20 and F30 body,
• correct positioning at the turbocharger and engine block ports.

Such fitment limits mechanical stress and reduces the risk of damage resulting from engine vibrations during dynamic driving.

Benefits of using an original turbocharger oil feed line

Using an original oil line in the B58 engine allows for maintaining the parameters specified by the manufacturer. In practice, this means:

• stable turbocharger lubrication throughout the entire rev range,
• better resistance to temperature and pressure compared to low-quality replacements,
• reduced risk of turbocharger failure caused by insufficient oil supply,
• easier diagnostics and service due to compliance with BMW service documentation.

This solution is particularly recommended when replacing the turbocharger, repairing oil leaks in the forced induction area, or during preventive maintenance of the lubrication system in heavily loaded B58 units.

Condition and service application

The item comes from disassembly and is offered as a used turbocharger oil feed line, which allows for an economical repair while maintaining the original manufacturer's specification. This type of part is suitable both for standard replacement of a worn line and for rebuilding the forced induction system after a turbocharger failure.

Related items from the same group

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 oil lines, vacuum hoses, or cooling system pipes, check the available parts in the BMW lines, hoses and pipes category.

When selecting used OEM components, specialist guides on identifying parts by number and VIN can also be helpful – you will find more practical tips in the article Audi five-cylinder engine – a legend from Quattro to RS3 and how to care for it using original Audi parts, which discusses universal principles of working with original components.