BMW G01 G01 LCI G02 Coolant Expansion Tank Hose Tube Line Pipe M40i B58D 8670669

BMW G01 G01 LCI G02 Coolant Expansion Tank Hose Tube Line Pipe M40i B58D is an original cooling system component from the Cooling system hoses and pipes group, designed for precise fluid routing between the radiator and the expansion tank. Thanks to its factory-fit design for BMW G01/G02 series models, it ensures stable operating parameters for the M40i B58D engine and predictable cooling system performance. This is a solution for users who want to maintain the structural integrity of their vehicle and use components that meet BMW's factory specifications.

Specifications and technical data

• SKU: 8670669
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8670669
• Substitutable numbers: 17128670669, 8670669
• Part type: Hose
• Category: Coolant Hoses

Purpose and function in the cooling system

The presented hose is a component connecting the expansion tank to the radiator in BMW G01, G01 LCI, and G02 vehicles with the M40i B58D engine. It is responsible for the controlled flow of coolant, which directly impacts the maintenance of stable engine operating temperatures and proper system venting. Using an original hose allows for the preservation of correct routing geometry, internal diameter, and flow characteristics, which is essential for the operation of modern turbocharged units.

Construction and fitment for BMW G01 / G02

The coolant expansion tank hose has been designed specifically for the engine bay architecture of the BMW G01, G01 LCI, and G02, taking into account the layout of the radiator, expansion tank, and auxiliary components. The properly shaped cross-section and factory connection ends facilitate installation and minimize the risk of leaks. As a result, the hose operates stably under both high fluid temperatures and pressure changes within the cooling system.

Benefits of using an original BMW hose

Using an original hose instead of a worn-out component provides a number of practical benefits:

• maintenance of the factory cooling system performance characteristics in the M40i B58D engine,
• secure fitment to radiator and expansion tank ports,
• reduction of the risk of micro-leaks and pressure drops in the system,
• consistency with other BMW cooling system components. For users who prioritize compatibility with the factory design and predictable vehicle behavior, choosing an original hose is a safe and technically sound solution.

Product characteristics and condition

The offered hose comes from the BMW range and belongs to the group of OEM components used as factory equipment in G01/G02 models. The product is in used condition, meaning it has been previously installed in a vehicle but is still suitable for further use after proper installation verification. This type of component represents a reasonable compromise between repair costs and maintaining the original build quality characteristic of the BMW brand.

Technical support and cooling system knowledge

When replacing hoses and pipes in the cooling system, it is worth understanding the relationships between individual elements – the radiator, expansion tank, main hoses, and auxiliary lines. A detailed discussion of typical overheating symptoms and the impact of cooling system efficiency on engine durability can be found in the article Engine cooling system – overheating, repair, and used radiators, which helps in better planning service and diagnostics.

Expanding your BMW cooling system upgrade

If you are planning a comprehensive repair or upgrade of the cooling system area in your BMW and need other elements from the same group, such as additional lines, return hoses, or connecting sections to the expansion tank, check the available parts in the BMW cooling system hoses and pipes category. For users interested in a broader context regarding the use of pre-owned components in premium cars, including BMW vehicles, the following material describing current market trends and the approach to original second-hand parts may also be helpful: why used original parts for premium cars are becoming an increasingly popular choice.