BMW N57 & B57 High-Flow Air Filter – K&N Performance Upgrade
Overview
K&N® BMW N57 & B57 High-Flow Air Filters improve airflow for BMW 30d, 35d, 40d and 50d models fitted with N57 and B57 diesel engines.
These filters use oiled cotton technology to let your engine breathe more freely.
As a result, your turbochargers spool faster and your engine responds quicker.
At the same time, the filter captures harmful dirt and dust.
This helps protect your BMW engine while maintaining strong airflow.
Because the filter drops straight into the factory air box, installation is quick and simple.
In addition, K&N backs every filter with a No-Hassle Lifetime Limited Warranty.
That means you get long-term performance and peace of mind.
Why Choose a K&N Filter for BMW N57 and B57 Engines?
Increased Turbo Efficiency
BMW N57 and B57 engines rely on clean, unrestricted air to produce power.
However, standard paper filters restrict airflow as they become dirty.
A K&N high-flow filter reduces this restriction.
Therefore, your turbos can pull in more air with less effort.
As a result, you get faster boost response and smoother power delivery.
Precision Fit for BMW 30d, 35d, 40d and 50d
K&N designs these filters to match BMW’s factory air boxes.
So, you get a perfect seal without modifications.
You simply remove the stock filter and install the K&N replacement.
Because of this design, you keep all factory ducting and heat shielding.
Four-Layer Filtration Technology
Each K&N filter uses four layers of premium cotton gauze.
These layers work together to trap dirt while allowing high airflow.
In addition, the special filter oil helps capture even fine particles.
This keeps your BMW engine protected under daily driving and high boost.
Built for Performance Driving
BMW diesel engines often run high boost and high intake airflow.
For that reason, K&N uses strong rubber seals and reinforced filter frames.
These parts resist heat, vibration, and pressure changes.
So, your filter keeps working even during hard driving or tuned setups.
Low Maintenance and Long Service Life
Unlike paper filters, K&N filters do not need regular replacement.
Instead, you clean and re-oil them every 75,000 miles under normal driving.
That saves both time and money.
Over the life of your BMW, this can save you up to £100+ in filter costs.
Better for the Environment
Disposable air filters create large amounts of waste each year.
However, a reusable K&N filter reduces landfill waste.
So, you improve performance while helping the environment.
Key Benefits for BMW N57 & B57 Owners
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Improved airflow for turbocharged BMW diesel engines
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Faster turbo response and better throttle feel
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Direct fit for BMW 30d, 35d, 40d and 50d models
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Washable and reusable for long-term savings
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Designed for both stock and modified engines
Cross Reference Numbers
This K&N BMW N57 & B57 High-Flow Air Filter replaces the following OEM and aftermarket part numbers:
BMW (OEM)
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13718418111
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13718518111
Aftermarket Brands
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1A First: A63646
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Alco: MD8748
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Autopart International: 5000501809
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Beck/Arnley: 0421896
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BMC: FB82104
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Comline: EAF888
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Coopers: PA7789
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Fiaam: PA7789
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Fram: CA11708
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Hastings: AF1662
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Mahle: LX27961
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Muller: PA3646
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Pipercross: PP1930DRY
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Purflux: A1580
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Ryco: A1881
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Vaico: V202067
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Wesfil: WA5386
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WIX: 49555
Contact us if you have any questions about unlocking the full potential of your BMW with high-performance upgrade turbos and parts from Falcon Turbos.
