BMW G30 G31 G11 G12 Gearbox Oil Cooler Return Line Pipe Hose 740e 8482758

BMW G30 G31 G11 G12 Gearbox Oil Cooler Return Line Pipe Hose 740e is an original transmission oil cooling system component designed for BMW 5 and 7 Series hybrid models. Thanks to its factory geometry and robust construction, the hose ensures stable heat dissipation from the gearbox oil, which translates into predictable drivetrain performance and reduces the risk of overheating. This is a solution for users who want to maintain consistency with BMW factory specifications while optimizing the durability of the drivetrain.

Specifications and technical data

• SKU: 8482758
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8482758
• Substitutable numbers: 17228482758, 17228602406, 8482758, 8602406
• Part type: Oil Cooler Line
• Category: Oil Coolers & Lines

Purpose and function in the oil cooling system

The hose operates in the circuit between the gearbox and the oil cooler, responsible for transporting the cooling medium under the appropriate pressure. In BMW G30, G31, G11, and G12 vehicles with the 740e unit, a stable transmission oil temperature is crucial for smooth gear shifting and the longevity of internal gearbox components.

A properly selected hose:

• maintains system tightness under typical thermal and pressure loads,
• reduces pressure drops in the section between the gearbox and the cooler,
• supports uniform oil cooling in both city and highway driving conditions.

Original origin and installation compatibility

The component comes from the BMW line, which means it retains factory mounting points and hose routing relative to other components in the engine bay. As a result, installation is predictable, without the need for modifying brackets or adjusting lengths.

The hose is assigned to a specific group of models and powertrain versions, which facilitates part selection during gearbox servicing or oil cooler replacement. Using an original solution helps avoid collision issues with other equipment components and minimizes the risk of leaks resulting from improper routing.

Characteristics of the used component

The part is used, which in practice means a favorable compromise between repair costs and maintaining the original BMW specification. This type of component, with proper operation and no mechanical damage, can continue to function in the oil cooling system without negatively affecting gearbox performance parameters.

Choosing a used oil cooler hose is particularly attractive for comprehensive drivetrain repairs, where both technical consistency and service budget control are important.

Benefits of using an original oil cooler hose

Using a hose dedicated to the BMW G30, G31, G11, and G12 in the 740e version allows you to:

• maintain gearbox performance parameters within the range specified by the manufacturer,
• reduce the risk of oil overheating under high-load conditions,
• preserve the factory routing of the cooling line, which facilitates later inspections and diagnostics,
• reduce service costs by using a proven, used OEM part.

For users planning a wider range of work on the oil cooling and gearbox system, a good starting point would also be to review other items from the Oil coolers and hoses group, available in our store: check out how used components help in the comprehensive modernization of older BMWs.

Operation in high-temperature conditions

In hybrid vehicles such as the BMW 740e, the gearbox oil cooling system operates under increased thermal loads, especially during the summer. A functional oil cooler hose supports oil temperature stabilization, which is important for protecting the transmission from accelerated wear.

If you want to better understand the impact of high temperatures on cooling systems in cars and are looking for practical tips on choosing used components, check out our guide: Summer heat and the cooling system – how used radiators and fans help reduce service costs.

Summary

BMW G30 G31 G11 G12 Gearbox Oil Cooler Return Line Pipe Hose 740e is a factory transmission oil cooling system component designed for specific BMW 5 and 7 Series models. The used OEM part allows you to maintain compliance with the factory design, ensures predictable gearbox performance, and represents a sensible solution for drivers who want to combine technical repair correctness with cost control.