BMW E90 E91 E92 325d 330d M57N2 Turbo Intercooler Pipe 7796303 7798098 7798099

The BMW E90 M57N2 Intercooler Air Hose is an original turbocharger and parts component designed for BMW 3 Series E90 diesel engines with the M57N2 engine. This OEM component ensures a factory fit, stable airflow to the intercooler, and maintains stock turbocharging performance.

Specifications and technical data

• SKU: 7796303
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7796303
• Substitutable numbers: 11617796303, 7796303, 7798098, 7798099
• Category: Turbos & Parts

Purpose and role in the charging system

The BMW E90 M57N2 intercooler air hose is responsible for a tight and stable connection of the intake system components between the turbocharger, intercooler, and intake manifold. A properly selected pipe minimizes boost pressure drops, reduces the risk of leaks, and supports uniform cylinder filling with compressed air.

In the M57N2 engine, operating under higher loads and boost pressures, the quality of the hose has a direct impact on:

• boost pressure stability throughout the entire rev range,
• air cooling efficiency in the intercooler,
• throttle response and engine operation culture,
• reducing the risk of the engine going into emergency mode due to pressure drop.

OEM Construction, Fit and Compatibility

This intercooler air pipe comes from the BMW OE line, retaining the factory geometry, port diameters, and mounting points . This allows the component to fit the standard supercharger configuration in the BMW E90 with the M57N2 engine without the need for modifications or adaptations.

Key features:

• Original BMW specification – maintaining the design flow cross-sections and bend shapes, which reduces turbulence and pressure drops.
• Adapted to operate at high temperatures and elevated pressures typical of turbocharged units.
• Compatible with factory E90 engine compartment clamps, connectors and mounting brackets.
• Can be used as a replacement part in place of several reference numbers provided by the manufacturer.

Used condition – a conscious choice for the BMW E90 M57N2

The part is offered in used condition, allowing for cost-effective repair of the supercharger system while maintaining original BMW quality. This type of part is particularly attractive to users who:

• rebuild the stock intake system after a failure or leak,
• are looking for a factory replacement after the existing cable has broken or worn out,
• prefer OEM components over replacements with uncertain specifications.

Before installation, a standard visual inspection for any signs of wear is recommended to ensure the condition of the part meets the requirements of a specific service or tuning project.

Application in servicing and tuning the supercharging system

The BMW E90 M57N2 Intercooler Air Pipe Hose is suitable for both standard repairs and projects where maintaining stock, predictable engine performance is a priority. A properly selected hose:

• reduces the risk of charge air leaks at higher loads,
• supports stable operation of the turbocharger and intercooler,
• allows you to maintain factory parameters, which is important for diagnostics and tuning.

If you are planning a more extensive modernization of the supercharging system in BMW, it is worth getting acquainted with practical tips on the selection of intercooler and turbine components – you will find them in the article: checklist before purchasing a turbine and intercooler for a BMW 3 Series with a B58 engine , which organizes key issues related to compatibility and parts selection.

How to safely buy used supercharger components

Purchasing a used intercooler air hose is a sensible way to reduce service costs, provided you approach component selection wisely. It's worth paying attention to:

• compatibility with a specific engine and body generation,
• the type of material used and its resistance to working conditions,
• no visible mechanical damage that could affect tightness.

If you want to be better prepared for buying used supercharger components and avoid common pitfalls, check out the guide Buying Used Car Parts – The Most Common Mistakes When Choosing Tuning Parts , which discusses practical examples from the aftermarket.

If you are also looking for other intercooler air hoses dedicated to the BMW brand, check out our BMW intercooler air hoses category, where you will find a wide selection of components for various models and engine configurations.