K&N 33-3136 High-Flow Washable Panel Air Filter | OEM Replacement for BMW 3 Series G20/G21, 4 Series G22 & Z4 G29 (2018+) | Fits 318d 320d 320i 330i

K&N 33-3136 Performance Panel Filter for BMW G Series

Part number: 33-3136
Looking for a simple intake upgrade that you can service at home and keep using mile after mile? The K&N 33-3136 is a premium, washable and reusable cotton gauze drop-in filter that fits straight into the factory airbox on a wide range of latest-generation BMW models. It is a brilliant choice for drivers who want stronger engine breathing, crisp response and long-term value without resorting to a full induction kit.

We have installed this filter on our own cars and many customer vehicles here at MJ Modifications, and the feedback has been consistently excellent. Owners love the quality, the straightforward fit and the way it lets the engine breathe freely while maintaining dependable filtration.

Why this filter is a smart upgrade

• Direct-fit panel element for the standard BMW airbox on compatible models
• High-flow cotton media for improved engine breathing and responsive acceleration feel
• Washable and reusable for the lifetime of the vehicle, reducing service costs and waste
• Robust construction and a precise seal for clean, consistent airflow
• Easy DIY installation using basic tools, ideal for routine maintenance
• Suitable for petrol and diesel G-series engines including B47, B48 and B58 applications

Vehicle applications

This K&N 33-3136 panel element fits selected BMW G-series models. Highlights include:

BMW 3 Series G20 and G21

• 318d including mild hybrid variants
• 320d including xDrive and mild hybrid versions
• 320i
• 330i including xDrive
• 330d including xDrive
• 330e plug-in hybrid including xDrive and higher output trims
• M340i and M340i xDrive
• M340d mild hybrid xDrive

BMW 4 Series G22

• 420d including mild hybrid and xDrive
• 420i
• 430i
• 430d mild hybrid xDrive
• M440i xDrive
• M440d mild hybrid xDrive

BMW Z4 G29

• Model range covering 20i, 30i and M40i power levels

If you would like us to confirm suitability for your exact engine code and year, include your UK registration or last 7 of the VIN at checkout, or email our team.

Fitting and support

Professional installation available at MJ Modifications in Warwickshire. For a fitting quote or compatibility check, contact info@mjmodifications.co.uk. Prefer to do it yourself? This drop-in filter is a straightforward swap in the original airbox on the models listed above.

Part number

K&N 33-3136

Search-friendly terms

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