K&N 33-2997 Performance Air Filter for 2012-2020 BMW 335i/435i/M2/M135i/M235i

Vehicle Fitment

• 2012-2015 BMW 335i (F30/F31, 3.0L L6 N55, RWD/xDrive)
• 2013-2016 BMW 335i GT / 335i GT xDrive (F34, 3.0L L6 N55)
• 2013-2016 BMW 335i xDrive (F30/F31, 3.0L L6 N55)
• 2014-2016 BMW 235i (F22/F23, 2.0L L4 N55 - early production)
• 2013-2016 BMW 435i (F32/F33/F36, 3.0L L6 N55, RWD/xDrive)
• 2015-2016 BMW 435i Gran Coupe / 435i xDrive Gran Coupe (F36, 3.0L L6 N55)
• 2013-2014 BMW ActiveHybrid 3 (F30, 3.0L L6 N55 Hybrid)
• 2012-2016 BMW M135i (F20, 3.0L L6 N55)
• 2014-2016 BMW M235i / M235i xDrive (F22/F23, 3.0L L6 N55)
• 2016-2018 BMW M2 (F87, 3.0L L6 N55)
• 2014-2020 BMW i8 (I12/I15, 1.5L L3 B38 Hybrid)

Fitment Notes

• Primary engine code is N55 B30A (3.0L L6 turbocharged); i8 fitment uses the B38 K15A (1.5L L3 turbocharged, plug-in hybrid).
• 335i fitment covers both the US-market F30 sedan and non-US F30/F31 body styles.
• Does not fit the 340i, 440i, or M3/M4 which use the B58 or S55 engine and require a different filter.
• BMW M2 fitment applies to the original F87 M2 (N55 engine, 2016-2018) only; the M2 Competition (S55) uses a different filter.

Features

• Multi-layer oiled cotton gauze media engineered to outflow the restrictive OEM paper element.
• Washable and reusable - designed to last the full lifetime of the vehicle.
• Up to 99% filtration efficiency maintained across both 1.5L and 3.0L engine applications.
• Direct drop-in fit into the factory airbox - no cutting, drilling, or adapters required.
• Cleaning interval of up to 75,000 miles under normal highway driving conditions.
• Backed by K&N's No-Hassle Lifetime Limited Warranty.

Specifications

• Filter Shape: Panel
• Filter Material: Oiled Cotton Gauze
• Filter Color: Red
• Outside Length: 10.5 in (267 mm)
• Outside Width: 8.563 in (217 mm)
• Height: 1.25 in (32 mm)
• Filter Re-Oiling Amount: 1.37 oz (40 ml)
• Weight: 1.4 lb (0.6 kg)
• Street Legal in All US States: Yes
• TUV Approved: Yes (Europe)

Included Components

• 1x K&N 33-2997 High-Flow Panel Air Filter (pre-oiled, ready to install)

Product Description

The K&N 33-2997 is a washable, reusable high-flow drop-in replacement air filter engineered for BMW's N55-powered F-series lineup, spanning the 335i, 435i, M135i, M235i, and M2, as well as the B38-powered i8 plug-in hybrid. It fits directly into the factory airbox on all listed platforms in both RWD and xDrive configurations with no modifications required, making it one of the most accessible performance upgrades for these models.

Built from multi-layer oiled cotton gauze between two aluminum wire screens, the 33-2997 maintains up to 99% filtration efficiency while improving airflow over the OEM paper element. With a 75,000-mile cleaning interval and K&N's Lifetime Limited Warranty, it is a cost-effective, long-term upgrade suited to daily drivers, track enthusiasts, and i8 owners alike across BMW's high-performance F-series and I-series platforms.