BMW E81 E87 E90 E91 LCi EGR Cooler Exhaust Gas Cooling Unit N47 7810166

Visual condition of the part

The product shows signs of use visible in the photos.

BMW E81 E87 E90 E91 LCi EGR Cooler Exhaust Gas Cooling Unit is an exhaust gas recirculation system component designed for N47 engines in facelifted BMW 1 and 3 Series compact and mid-size models. This used component from the Exhaust manifolds group allows for the restoration of proper exhaust system operation and stable combustion parameters. It is a solution for drivers looking for a technically verified part at a reasonable price, while maintaining the factory engine performance characteristics.

Specifications and technical data

• SKU: 7810166-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7810166
• Substitutable numbers: 11717810166, 7810166, 7805447, 7810871, 7811174, 7811172, 11717805447, 11717810871, 11717811174, 11717811172
• Category: Manifolds & Headers

Function of the EGR valve and exhaust gas cooler in the N47 engine

In the presented solution, the EGR valve works in conjunction with the exhaust gas cooler, creating an integrated module responsible for the controlled return of a portion of exhaust gases to the combustion chamber. In the N47 engine, this is crucial for:

• maintaining the appropriate exhaust gas temperature,
• reducing nitrogen oxide emissions,
• stable engine operation under low and medium load conditions,
• protecting exhaust system components from excessive thermal stress.

Thanks to the use of the original BMW design, the exhaust gas recirculation system maintains the correct flow characteristics, which translates into predictable engine behavior and proper interaction with the control electronics.

Compatibility with BMW E81, E87, E90, E91 LCi

The offered EGR module has been designed for use in facelifted BMW 1 Series (E81, E87) and 3 Series (E90, E91) vehicles equipped with the N47 engine. This means a perfect fit in terms of:

• connection geometry for the exhaust and intake systems,
• mounting points in the engine bay,
• electrical connectors controlling the valve operation,
• compatibility with the factory engine control unit software.

Such compatibility allows for installation without the need for mechanical modifications, which is particularly important when servicing modern diesel engines.

Benefits of using an original BMW component

Choosing an original EGR module from the Exhaust manifolds group ensures consistency with the other components of the exhaust and intake system. The most important advantages include:

• maintaining factory exhaust and air flow parameters,
• proper interaction with temperature and pressure sensors,
• reduced risk of diagnostic errors related to improper EGR operation,
• easier diagnostics and maintenance due to compliance with manufacturer documentation.

For the user, this means more predictable operation, stable engine refinement, and a reduction in limp mode issues resulting from improper exhaust gas recirculation.

Characteristics of the used EGR module

The offered item is used, which in practice means it has been removed from a vehicle and verified for its suitability for further use. This type of part is a good choice in situations where:

• a quick and economical exhaust system repair is necessary,
• you want to maintain the original BMW design,
• you want to avoid the risks associated with low-quality aftermarket replacements.

The used EGR module allows for the restoration of proper exhaust gas recirculation system operation while reducing service costs, which is particularly important for heavily used diesel engines.

Technical support and additional materials

To better understand the impact of such components on engine performance and operating characteristics, it is worth checking out our guide on exhaust systems and performance components: Performance exhaust systems: used manifolds and sports catalytic converters on the road. The article discusses practical aspects of selecting and using used exhaust system components in premium vehicles.

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other components from the same group, such as additional manifold sections, connection elements, or sections working with the turbocharger, check out the available parts in the BMW Exhaust manifolds category.