EGR Cooler BMW G11 G12 G20 G21 G30 G31 330d B57 Exhaust Gas Cooler 8574815

EGR Cooler BMW G11 G12 G20 G21 G30 G31 330d B57 Exhaust Gas Cooler is an original exhaust gas recirculation system component designed for modern BMW B57 diesel engines. This used EGR cooler allows for a technically correct repair of the exhaust emission system while maintaining the factory engine performance characteristics and compliance with environmental standards. It is a solution for users who expect a proven OEM design while also wanting to optimize service costs.

Specifications and technical data

• SKU: 8574815
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8574815
• Substitutable numbers: 8574815, 11718574815
• Category: EGR Parts & Valves

Purpose and role in the EGR system

The EGR cooler in BMW 3, 5, and 7 series models with the B57 engine is responsible for lowering the temperature of exhaust gases directed back to the intake manifold. This ensures the recirculation system operates stably and the engine maintains proper combustion parameters across a wide range of loads. A properly functioning EGR cooler supports the maintenance of appropriate nitrogen oxide emission levels and helps reduce the risk of overheating components associated with the recirculation system.

Construction and compatibility with EGR Valves and parts

The offered cooler belongs to the EGR Valves and parts group, working in conjunction with the recirculation valve, exhaust pipes, and the engine's electronic control unit. The OEM design ensures a perfect fit with factory mounting points in the engine bay and correct connection to the exhaust and cooling circuits. As a result, installation in dedicated BMW models is straightforward, with no need for system modifications.

Benefits of using an original EGR cooler

Using an original exhaust gas cooler in the B57 engine allows for the preservation of factory control maps and engine performance parameters. In practice, this means:

• stable operation of the exhaust gas recirculation system across the full range of operating temperatures,
• reduced risk of engine control unit errors related to incorrect exhaust gas temperatures,
• proper cooperation with other components of the EGR Valves and parts system,
• maintenance of compliance with factory exhaust emission specifications.

For the user, this means more predictable vehicle behavior, a lower risk of entering limp mode, and better refinement of the diesel engine in daily use.

Used condition and installation aspects

The item is offered in used condition, which allows for an economical repair of the EGR system while maintaining the manufacturer's original specifications. Before installation, it is recommended to perform a standard check for leaks and channel patency, as well as to inspect associated hoses and seals. A properly selected EGR cooler allows technicians to perform repairs based on factory procedures, without the need for software adaptation or mechanical installation changes.

Integration with other BMW EGR system components

In modern BMW B57 units, the exhaust gas recirculation system is closely linked to the engine management system, turbocharger, and cooling system. A functional EGR cooler supports:

• maintaining the appropriate temperature of exhaust gases directed to the intake,
• stable operation of the EGR valve and correct flow control,
• reduction of carbon deposit buildup in the intake manifold,
• even thermal loading of components associated with the recirculation system.

Thanks to this, the entire EGR Valves and parts system in BMW vehicles can operate under conditions close to factory standards, which translates into greater component durability and predictable engine behavior in the long term.

If you are planning a comprehensive repair or upgrade of your BMW engine area and need other components from the same group, such as exhaust gas coolers, recirculation valves, or recirculation pipes, check out the available parts in the BMW EGR Valves and parts category.

For users interested in the broader context of using original components in vehicles of different generations, an article comparing the design of classic and modern MINI models and the role of OEM parts in preserving their character may be helpful – more information can be found in the material Classic MINI vs modern MINI – differences and OEM parts.