K&N’s state-of-the-art oiled cotton gauze media captures fine contaminants while allowing your engine to breathe freely. The filter is pre-oiled and ready to install directly into your factory air box with zero modifications required.

Backed by K&N’s Million Mile Limited Warranty, this filter is engineered to last the entire life of your vehicle. For BMW owners seeking a low-maintenance, high-performance upgrade that never needs replacement, the K&N drop-in filter is the definitive choice.

• Direct Fit for Multiple BMW Models: Compatible with BMW M340i (G20), 330i (G20/F30), 320d/330d (diesel variants), Z4 (G29), 420d/430i/440i (G22) – always verify fitment with part #33-3136.

• Increased Horsepower & Torque: Engineered to improve airflow over restrictive OEM paper filters, unlocking measurable performance gains across the RPM range .

• Washable & Reusable Lifetime Filter: Cleanable using K&N’s simple Recharger service kit; designed to never be thrown away, saving you money over time ..

• Superior Filtration Technology: Multi-layer, oiled cotton gauze design traps dirt and contaminants effectively while maintaining high airflow – unlike paper filters that choke as they get dirty .

• Easy 10-Minute Drop-In Installation: Removes and installs in minutes using basic hand tools; fits perfectly inside the factory air box with no cutting or tuning required.

• Environmentally Friendly: Eliminates disposable paper filter waste; one K&N filter replaces dozens of single-use paper filters over your vehicle’s lifespan.

  
  

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