Charge Air Line BMW X5 E70 LCI X6 E71 N57 N57S Intake Manifold Hose 7807986

The BMW E70 LCI E71 N57 N57S Intercooler Air Hose Pipe is an original turbocharger and parts component designed for BMW diesel engines. This OEM part ensures a factory fit to the intake system, making installation easier and maintaining the proper operating parameters of the turbocharged engine.

Specifications and technical data

• SKU: 7807986
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7807986
• Substitutable numbers: 11617807986, 7807986, 7809834, 4737106
• Fuel type: Diesel
• Tire profile: 65535
• Category: Turbos & Parts

Purpose and function in the supercharging system

The BMW E70 LCI E71 N57 N57S intercooler air duct hose/pipe is responsible for transporting compressed air between the turbocharger, intercooler, and intake manifold. The correct hose is crucial for:

• maintaining the tightness of the charging system at high operating pressure,
• stable operation of the diesel engine under load,
• reducing pressure drops and air flow losses,
• maintaining the standard power and torque parameters of the N57 and N57S units.

The element comes from the turbocharger and parts group, thanks to which it is structurally adapted to the factory BMW supercharging system, without the need for modifications.

Benefits of using the original intercooler hose

The use of the original intercooler air duct in a BMW diesel engine brings tangible operational benefits:

• Factory geometry and passage diameter – maintaining proper air flow throughout the entire rpm range.
• Compatibility with diesel engines – hose designed for the specificity of N57/N57S units operating with high boost pressure.
• Stability of turbocharger operation – reducing the risk of overcharging, power drops and emergency mode resulting from intake leaks.
• Better engine performance – even cylinder filling promotes smooth acceleration and predictable throttle response.

Condition, assembly and service application

The intercooler air hose offered is a used part, allowing for a cost-effective repair of the supercharger system while maintaining the original BMW specifications. This is a practical solution in situations where:

• the existing cable has become split, cracked or worn out,
• there are symptoms of a loss of power, smoking or a characteristic hissing of air under load,
• it is necessary to quickly replace the element without investing in expensive replacements.

Thanks to its factory origin, the hose is ready for installation in place of the original component, maintaining the standard routing in the engine compartment. A properly selected hose reduces the risk of leaks, which could lead to engine control unit errors and turbocharger malfunction.

Importance for diesel engine performance and tuning

A functioning intercooler air duct is crucial not only in the stock configuration but also when modifying N57/N57S engines. Stable boost pressure and proper airflow are the foundation for safely increasing power. If you're planning further modifications, it's worth ensuring that your turbocharger and parts are in good working order.

For those interested in a broader approach to modifying turbocharged engines, a guide describing the practical aspects of increasing power may be helpful – you can find it in the article How to increase engine power – a practical guide to engine tuning with used parts , which discusses, among other things, component selection and safety issues.

Other BMW intercooler hoses and parts knowledge

If you are looking for other intercooler air hoses for BMW, check out our dedicated offer in the BMW intercooler air hoses category, where you will find a wide selection of turbocharger system components for various models of this brand.

When choosing used parts, it's also worth understanding the broader perspective on the durability and cost-effectiveness of such solutions. Practical tips on when used components make the most sense can be found in the article "Volkswagen – Reliability and Reliability: Why Are Used VW Parts a Smart Choice?" , which discusses the approach to purchasing used parts in a way that's easily applicable to other brands, including BMW.