BMW E81 E87 LCI E90 116i N45N Intake Inlet Manifold 7518751

The BMW E81 E87 LCI E90 116i N45N Intake Manifold is an original intake system component from the BMW group, designed for the N45N engine in 1 and 3 Series models. A used manifold from this reference ensures the factory intake port geometry, which translates to stable engine operation and predictable cylinder filling parameters. This is a solution for users who want to maintain consistency with the factory design and avoid issues with aftermarket replacements.

Specifications and technical data

• SKU: 7518751
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7518751
• Substitutable numbers: 11617552354, 7552354, 7518751, 7560229
• Category: Intake Manifolds

Intended Use and Compatibility with N45N Engine

The manifold belongs to the intake manifolds category and has been specifically designed for the N45N engine architecture used in BMW E81, E87 LCI, and E90 116i models. This means appropriate port placement, correct channel shape, and compatibility with the stock throttle body and intake accessories in these units.

By retaining the original design, the manifold works with the factory engine control unit, without the need for software modifications or mechanical adaptations. This is particularly important for repairs where quick installation and reliable operation after engine startup are crucial.

Construction and Operating Characteristics of the Intake Manifold

The original BMW intake manifold for the N45N engine features optimized channel geometry that supports even filling of all cylinders. This translates to:

• stable idle operation,
• smooth acceleration across the entire RPM range,
• proper cooperation with the stock fuel and ignition systems.

The factory design of the manifold is adapted to the thermal conditions of the BMW engine bay, which reduces the risk of deformation and leaks during long-term operation. Using an original part helps maintain engine performance parameters at the level intended by the manufacturer.

Benefits of Using an Original BMW Manifold

Choosing a used, original intake manifold for BMW E81, E87 LCI, and E90 116i is a solution that combines economic aspects with maintaining factory design principles. Key benefits include:

• Full compatibility with the BMW intake system – correct positioning of ports, mounting points, and interfaces with accessories.
• Reduced risk of installation problems – no need for modifications, adjustments, or the use of additional adapters.
• Consistency with factory engine control – maintaining the operating parameters intended for the N45N engine.

For workshops and individual users, this means shorter repair times, predictable final results, and a lower risk of complaints related to improper intake system operation.

Condition, Verification, and Service Application

This part is from a disassembly and is offered as a used BMW intake manifold. This type of part is particularly useful for:

• repairs after mechanical damage to the manifold,
• eliminating leaks in the intake system,
• restoring the stock configuration after unsuccessful modifications.

Before installation, standard service procedures are recommended: checking for leaks, the condition of the ports and sealing surfaces, and using new seals in accordance with BMW recommendations. This approach maximizes the potential of the original part and minimizes the risk of further interventions in the intake system.

More About Manifolds and Exhaust Systems

If you want to gain a broader understanding of how manifolds affect engine characteristics and the relationship between intake and exhaust systems, it's worth consulting expert materials. Practical tips on selecting and operating used manifolds can be found in the article: Performance Exhaust Systems: Used Manifolds and Sport Catalytic Converters on the Road.

If you are also looking for other BMW intake manifolds for various models of this brand, check out our dedicated category: BMW Intake Manifolds.