Does the BMW N20 panel air filter require any modifications to fit?

No. The BMW N20 panel air filter drops directly into the OEM N20 airbox in the same location as the factory paper element with no modifications, no additional hardware, and no cutting required. Installation takes approximately 10 minutes and is fully reversible.

Is this a panel filter or a cone filter?

The BMW N20 panel air filter is a panel-style drop-in replacement that fits inside the OEM airbox, retaining all the cold-air and sealed-box benefits of the factory setup. It is not a cone filter or an intake kit.

How do I clean and maintain the BMW N20 panel air filter?

Cotton gauze filters are washed with a dedicated filter cleaning kit (not included), dried thoroughly, and re-oiled if the filter uses oil. The filter can be cleaned and refitted multiple times over its service life, eliminating the ongoing cost of replacement paper elements.

Why is this sold as a pair?

The N20 engine uses two panel filter positions in the OEM airbox. Replacing both simultaneously ensures matched airflow and filtration performance across both positions rather than running one new and one old element.

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Description

MMX Blue Cotton Panel Air Filters for N20-Powered BMW F-Series 1, 2, 3, and 4 Series

BMW N20 panel air filter from MMX Performance is a direct-drop cotton gauze replacement for the restrictive factory paper element in the OEM N20 airbox covering the F20/F21 125i, F22/F23 220i and 228i, F30/F31/F34/F35 320i and 328i, and F32/F33/F36 420i and 428i. The factory paper element on the N20 restricts airflow to the turbo and requires periodic replacement; the MMX BMW N20 panel air filter replaces it with a high-flow blue cotton gauze element that improves the engine’s breathing efficiency, delivering a noticeable improvement in throttle response, induction character, and overall engine performance while fitting directly into the OEM airbox with no modifications. Unlike disposable paper filters, the cotton gauze construction is washable and reusable, making it a one-time investment that pays back over the life of the car. Installation takes approximately 10 minutes with no permanent modifications and is fully reversible; the filter drops directly into the same location as the factory element with no additional hardware. Sold as a pair.

Features

Blue cotton gauze construction, high-flow, washable, and reusable
Direct replacement for the OEM N20 paper filter element drops into the factory airbox
Improves airflow to the turbo for better throttle response and engine performance
Noticeable improvement in induction character
No permanent modifications, approximately 10 minutes to install
Fully reversible installation

Applications

BMW 125i: F20, F21 | 2012-2015
BMW 220i: F22, F23 | 2014-2016
BMW 228i: F22, F23 | 2014-2016
BMW 320i: F30, F31, F34, F35 | 2012-2015
BMW 328i: F30, F31, F34, F35 | 2012-2015
BMW 420i: F32, F33, F36 | 2014-2016
BMW 428i: F32, F33, F36 | 2013-2016

Notes

Sold as a pair
Compatible with N20 OEM airbox only. Confirm your engine code before ordering.
Direct replacement for the OEM panel air filter element not a cone or intake kit

Frequently Asked Questions

What does the BMW N20 panel air filter improve over the factory paper element? The MMX BMW N20 panel air filter uses blue cotton gauze construction that flows more air to the turbo than the restrictive factory paper element, improving throttle response, induction character, and overall engine performance. Unlike the paper element, the cotton gauze filter is washable and reusable, making it a long-term replacement rather than a periodic consumable.
Does the BMW N20 panel air filter require any modifications to fit? No. The BMW N20 panel air filter drops directly into the OEM N20 airbox in the same location as the factory paper element with no modifications, no additional hardware, and no cutting required. Installation takes approximately 10 minutes and is fully reversible.
Is this a panel filter or a cone filter? The BMW N20 panel air filter is a panel-style drop-in replacement that fits inside the OEM airbox, retaining all the cold-air and sealed-box benefits of the factory setup. It is not a cone filter or an intake kit.
How do I clean and maintain the BMW N20 panel air filter? Cotton gauze filters are washed with a dedicated filter cleaning kit (not included), dried thoroughly, and re-oiled if the filter uses oil. The filter can be cleaned and refitted multiple times over its service life, eliminating the ongoing cost of replacement paper elements.
Why is this sold as a pair? The N20 engine uses two panel filter positions in the OEM airbox. Replacing both simultaneously ensures matched airflow and filtration performance across both positions rather than running one new and one old element.

About MMX Performance

MMX Performance is a UK-based specialist in performance parts for BMW and MINI vehicles, crafting high-quality upgrades that blend precision engineering, rigorous testing, and motorsport heritage. Driven by enthusiast culture, MMX designs its products in the UK, often putting them through track validation, to ensure durability, fitment accuracy, and on-road performance. Their catalog spans drivetrain components, spacers, hardware, and chassis enhancements, all tailored to elevate both the driving experience and visual appeal of BMW and MINI models.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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MMX Blue Cotton Replacement Panel Air Filters for Fxx BMW 1 Series, 2 Series, 3 Series, and 4 Series (with N20 engine) [MMR01-0702]

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MMX Blue Cotton Panel Air Filters for N20-Powered BMW F-Series 1, 2, 3, and 4 Series

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Frequently Asked Questions

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