BMW 1 3 Series E81 E87 E90 E91 LCI N47 Exhaust Manifold EGR Gas Cooler 7810166

BMW 1 3 Series E81 E87 E90 E91 LCI N47 Exhaust Manifold EGR Gas Cooler is an exhaust gas recirculation system component designed for facelifted BMW 1 and 3 Series models, supporting the proper operation of the diesel engine. Thanks to its design, the cooler reduces the temperature of exhaust gases directed back to the manifold, which promotes stable engine performance and reduces emissions. This solution allows for maintaining the factory characteristics of the exhaust system and ensures consistency with the vehicle's original architecture.

Specifications and technical data

• SKU: 7810166
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7810166
• Substitutable numbers: 11717810166, 7810166
• Category: Manifolds & Headers

Purpose and function in the exhaust system

The EGR gas cooler in BMW E81, E87, E90, and E91 LCI models works with the exhaust gas recirculation system, which is integrated into the Exhaust Manifolds category. Its task is to cool a portion of the exhaust gases before they are reintroduced into the combustion chamber, which helps reduce nitrogen oxides and maintain engine operating parameters within the manufacturer's specifications.

Using an original solution of this type allows for maintaining:

• proper exhaust gas flow within the manifold and EGR valve,
• stable thermal conditions in the exhaust system,
• compliance with factory engine control unit maps.

Benefits of using an original EGR gas cooler

Selecting an exhaust gas cooler dedicated to specific facelifted BMW 1 and 3 Series generations minimizes the risk of fitment issues and exhaust system leaks. The original BMW design ensures proper placement of ports, mounting points, and flow channels, which translates into predictable engine operating conditions.

In practice, this means:

• easier installation in place of the factory component,
• maintaining proper cooperation with the exhaust manifold and EGR valve,
• reducing the risk of diagnostic errors related to exhaust gas temperature.

Characteristics of the used component

The offered EGR gas cooler is a used component, sourced from a dismantled BMW vehicle. This type of part is a reasonable choice for exhaust system maintenance when you want to maintain the original specification while optimizing costs. A used OEM component usually fits into the existing system better than universal aftermarket replacements.

Before installation, it is recommended to perform a standard verification of the condition of the flow channels and connection surfaces to ensure tightness and proper exhaust gas circulation throughout the system.

Application in BMW exhaust system service

Replacing the EGR gas cooler is often part of a broader exhaust system service, including inspection of the manifold, EGR valve, and exhaust supply lines. A properly selected component helps reduce the risk of overheating, power loss, and the appearance of emission-related errors.

If you want to better understand the relationships between the manifold, the gas cooler, and other system components, it is worth checking out our guide – you will find practical tips in the article Performance exhaust system: used manifolds and sports catalytic converters on the road, which discusses, among other things, the selection of used parts for BMW.

Service expansion within BMW Exhaust Manifolds

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as manifold sections, connections, or additional exhaust outlets, check out the available parts in the BMW Exhaust Manifolds category.