BMW E92 K&N Engineering Air FIlter High Flow 120i 316i 318i 320i Petrol B045L8

BMW E92 K&N Engineering Air FIlter High Flow 120i 316i 318i 320i Petrol is a high-performance intake system component designed for petrol engines, which improves airflow compared to standard solutions. Thanks to its High Flow design, the filter supports stable engine operation, especially during dynamic driving. It is a practical choice for drivers expecting freer engine breathing while maintaining a professional level of filtration.

Specifications and technical data

• SKU: B045L8
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: B045L8
• Substitutable numbers: E-2021, B045L8, F040U6
• Fuel type: Petrol
• Part type: Air Filter
• Category: Air Filters

Technical characteristics of the High Flow filter

The presented item from the Air filters category has been designed for petrol units, where combining high throughput with effective contaminant retention is key. The High Flow design promotes better cylinder filling, which can translate into a more linear throttle response and more stable RPM maintenance across the entire engine operating range.

The filter is dedicated to BMW 1 and 3 series E-family models, including the 120i, 316i, 318i, and 320i versions, ensuring a perfect fit for the characteristics of the petrol engines used in these vehicles. The use of an increased airflow solution is particularly beneficial in cars used in urban conditions and under higher loads, where the intake system is exposed to frequent load changes.

Benefits of using the K&N air filter

Using a High Flow filter in a BMW petrol engine brings a number of practical operational benefits:

• freer airflow to the intake manifold,
• stable engine operation across a wide RPM range,
• better utilization of the intake system's potential compared to a standard filter,
• a solution focused on long-term, repeatable performance in daily use.

For users looking for a high-performance component, the K&N filter is an attractive alternative to classic paper inserts, allowing for optimized airflow without interfering with the factory airbox design.

Intended for petrol engines

The filter has been prepared for units powered by petrol, which is significant for flow characteristics and operating conditions in the engine bay. In petrol engines, where the air-fuel mixture is precisely metered, the appropriate quantity and quality of intake air affects engine smoothness, load response, and parameter repeatability over a long period of use.

Thanks to its fitment for specific BMW E-series models, the filter can be used as a replacement part during standard maintenance without the need to modify the intake system. It is a solution that allows you to combine daily functionality with a more advanced approach to airflow management.

Product condition and service application

The offered filter belongs to the group of used parts, making it an interesting proposition for users looking for components with a reasonable cost-to-functionality ratio. It can be used both as a replacement during standard maintenance and for work related to intake system diagnostics, where a high-throughput filter is required.

In practice, installation is limited to replacing the insert in the air filter housing, which allows for efficient service work in workshop conditions or, with proper preparation, in garage conditions as well.

Complementary BMW Air filters

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 inserts, housings, or filter gaskets, check out the available parts in the BMW Air filters category.

Expert support and technical knowledge

For drivers who want to better understand the impact of individual components on vehicle handling and safety, our guide material on other key systems may be helpful. To this end, it is worth reading the article Suspension system – a comprehensive guide to shock absorbers, control arms, and stabilizers, which complements knowledge about vehicle operation in a broader technical context.