Air Intercooler BMW E90 E91 E92 325d 330d M57N2 Charge Cooler Radiator 7800680

Air Intercooler BMW E90 E91 E92 325d 330d M57N2 Charge Cooler Radiator is a factory-fitted turbocharging system component designed for front-end installation. As a used, original intercooler, it ensures stable operating conditions for the diesel engine, improving combustion parameters and the engine's overall refinement. This is a solution for drivers looking for a technically compatible component at a reasonable price.

Specifications and technical data

• SKU: 7800680-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7800680
• Substitutable numbers: 17517800680, 7800680, 17517789333, 7789333
• Location on the vehicle: Front
• Category: Intercoolers

Function and role of the intercooler in the BMW E90 325d 330d M57N2

The intercooler in the M57N2 engine is responsible for lowering the temperature of the air compressed by the turbocharger before it enters the intake manifold. Cooler air has a higher density, which translates into more efficient cylinder filling and stable power across the full load range. In practice, this means better throttle response, repeatable performance, and a reduced risk of charge air overheating during prolonged, dynamic driving.

Its placement at the front of the vehicle ensures optimal cooling airflow while driving, which is crucial for maintaining the correct temperature in the turbocharging system. A properly functioning intercooler also supports the engine control unit, which can utilize the full range of boost maps without having to frequently limit power due to excessively high intake air temperatures.

Design, fitment, and installation at the front of the vehicle

The offered intercooler has been designed specifically for the BMW E90 platform with 325d and 330d M57N2 units, ensuring it retains factory mounting points and connection geometry. This facilitates installation in the factory location at the front of the car, without the need to modify brackets, the bumper, or intake hoses. Such a solution minimizes service time and reduces the risk of leaks resulting from fitting universal components.

As an item in the Intercoolers category, the intercooler works in conjunction with other turbocharging system components – the turbocharger, pressure hoses, and intake manifold. Maintaining the original design results in predictable pressure drops, which is essential for the correct operation of sensors and control algorithms in the M57N2 engine.

Benefits of using an original used intercooler

Using an original intercooler in the BMW E90 325d 330d M57N2 allows you to maintain factory airflow and charge air cooling parameters. Compared to replacements with uncertain specifications, a properly selected intercooler reduces the risk of power loss, unstable boost, or error codes stored in the engine control unit. This is particularly important in diesel units, where the precision of fuel injection and boost pressure control has a direct impact on the durability of the equipment.

A used OEM part represents a reasonable compromise between cost and functionality – it allows you to restore the efficiency of the turbocharging system without the need to invest in a new part. For cars used intensively, including on routes and motorways, a functional intercooler helps maintain a stable intake air temperature, which promotes smooth engine operation and reduces fuel consumption under typical road conditions.

Selection, diagnostics, and operation of the charge air cooling system

When choosing an intercooler for a BMW, it is worth paying attention to compatibility with the specific engine version and body type to avoid problems with installation at the front of the vehicle. In the case of symptoms such as power loss at high ambient temperatures, noticeable "choking" during acceleration, or oil in the intake hoses, checking the condition of the intercooler should be one of the first diagnostic steps. Replacing it with a functional unit restores proper airflow and stabilizes the operation of the turbocharging system.

To better understand the relationship between ambient temperature and the efficiency of the cooling and turbocharging system, it is worth reading our guide: Summer heat vs. cooling system – used radiators and fans as a way to control temperature. You will find practical tips on the operation and selection of cooling components that help maintain stable engine operating conditions in high temperatures.

Expanding the turbocharging system service in a BMW

If you are planning a comprehensive repair or upgrade of the turbocharging area in your BMW and need other items from the same group, such as additional intercoolers, intake hoses, or mounting hardware, check out the available parts in the BMW Intercoolers category.

For larger service tasks that also include the drivetrain, our guide on clutches and dual-mass flywheels, which discusses diagnostics and part selection for vehicles with higher torque, may also be helpful: clutch and dual-mass flywheel – diagnostics and selection of components for the drivetrain. This makes it easier to plan the full scope of service work in a single maintenance cycle.