K&N Performance Air Filter – BMW B48 F4x Mini F5x

BMW3 models · 4 variants

MINI4 models · 8 variants

K&N Performance Air Filter – 33-5111

The K&N 33-5111 is a washable, reusable drop-in air filter designed to replace your standard paper air filter with a higher-flowing alternative. It fits directly into your existing airbox – no modifications needed – making it one of the simplest performance upgrades you can make to your vehicle.

Standard paper air filters are designed purely to keep the engine clean. K&N’s filter uses multiple layers of oiled cotton gauze, which allows more air to pass through while still trapping harmful dirt and debris. More air reaching the engine can contribute to modest improvements in throttle response and overall engine performance.

Washable and Reusable for Life

Unlike a standard disposable filter that needs replacing at regular service intervals, the K&N 33-5111 is designed to last the lifetime of your vehicle. When it needs attention, you simply clean it using a K&N cleaning kit, re-oil it, and refit it. Under normal driving conditions, cleaning is only needed infrequently – saving you money on replacement filters over time and reducing waste.

• Direct drop-in replacement – fits your factory airbox with no modifications
• Multi-layer oiled cotton gauze construction for improved airflow and filtration
• Washable and reusable – designed to last the lifetime of the vehicle
• Arrives pre-oiled and ready to install straight away
• Backed by K&N’s lifetime limited warranty (limitations apply)

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Technical Specifications

• Air Filter Material: Cotton Gauze
• Air Filter Shape: Panel
• Filter Re-Oiling Amount: 2.27 oz (67 ml)
• Frame Design: Flexible
• Height: 1.375 in (35 mm)
• Item Type: High Performance
• Oil Included: Yes
• Outside Length: 11.125 in (283 mm)
• Outside Width: 8.75 in (222 mm)
• Package Contents: 1 Air Filter
• Package Material: Corrugated
• Package Quantity: 1
• Package Type: Box
• Pre-Screened: No
• Product Box Height: 11.59 in (294 mm)
• Product Box Length: 10.47 in (266 mm)
• Product Box Width: 1.75 in (44 mm)
• Product Style: Panel Air Filter
• Product Weight: 1.40 lb (0.64 kg)
• Warranty: No-Hassle Lifetime Limited
• Washable: Yes
• Weight: 1.4 lb (0.6 kg)

OE Cross References

• Autopart International: 5000711305, Autopart International: 5000711306, BMW: 13718480400, BMW: 13718480931, Carquest: 518525, Carquest: 518526, Premium Guard: PA99606, Purolator: A31798, WIX: WA11399