K&N 33-2070 High-Flow Air Filter for 1990-2006 BMW 3 5 7 Series Z3 Z4 X3 L6

Vehicle Fitment

• 1990-1999 BMW 320i / E36 (All Trims, L6 2.0L M50/M52)
• 1991-1999 BMW 325i / E36 (All Trims, L6 2.5L M50/M52, Sedan / Coupe / Convertible / Touring)
• 1992-1995 BMW 325iS / E36 (All Trims, L6 2.5L M50)
• 1993-1995 BMW 325Ci / E36 (All Trims, L6 2.5L M50)
• 1995-1999 BMW 328i / E36 (All Trims, L6 2.8L M52)
• 1995-1999 BMW 328iS / E36 (All Trims, L6 2.8L M52)
• 1997-1999 BMW 323i / E36 (All Trims, L6 2.5L M52TU)
• 1997-1999 BMW 323iS / E36 (All Trims, L6 2.5L M52TU)
• 1998-1999 BMW 323Ci / E36 (All Trims, L6 2.5L M52TU)
• 1998-1999 BMW 328Ci / E36 (All Trims, L6 2.8L M52)
• 1998-1999 BMW 328ic / E36 (All Trims, L6 2.8L M52)
• 1992-2000 BMW M3 / E36 (All Trims, L6 3.0L S50 / 3.2L S52)
• 1994-2001 BMW 728i / E38 (All Trims, L6 2.8L M52)
• 1996-2001 BMW 728iL / E38 (All Trims, L6 2.8L M52)
• 1996-2000 BMW 520i / E39 (All Trims, L6 2.0L M52)
• 1995-2000 BMW 523i / E39 (All Trims, L6 2.5L M52)
• 1995-2000 BMW 528i / E39 (All Trims, L6 2.8L M52)
• 2000-2004 BMW 525i / E39 (All Trims, L6 2.5L M54)
• 2000-2004 BMW 530i / E39 (All Trims, L6 3.0L M54)
• 1997-2002 BMW Z3 / E36/7 (All Trims, L6 2.5L / 2.8L / 3.0L M52/M54 - incl. Z3 M Coupe & M Roadster)
• 1997-2000 BMW 323Ti / E36 (Compact, L6 2.5L M52TU - European Market)
• 1998-1999 BMW M Coupe / E36/8 (All Trims, L6 3.2L S52)
• 2001-2003 BMW 525i / E39 (All Trims, L6 2.5L M54)
• 2001-2003 BMW 530i / E39 (All Trims, L6 3.0L M54)
• 2003-2006 BMW Z4 / E85 (All Trims, L6 2.5L / 3.0L M54)
• 2004-2006 BMW X3 / E83 (All Trims, L6 2.5L / 3.0L M54)

Fitment Notes

• E36 M3 fitment covers both the US-spec S52 3.2L and Euro-spec S50 3.0L variants
• BMW 323Ti is a European-market Compact (E36) model only; does not apply to US-market vehicles
• Z3 M Coupe and M Roadster fitment confirmed for S52 3.2L engine
• Does not fit E46 3 Series (1999-2005) - see K&N 33-2990 or 33-2843 for E46 applications
• Does not fit E39 M5 (S62 V8) - M5 requires a separate air filter
• X3 fitment covers E83 generation (2004-2006) with M54 engine only; does not fit 2007+ E83 with N52 engine
• Z4 fitment covers E85 generation (2003-2006) with M54 engine only; does not fit 2006+ E85/E86 with N52 engine

Features

• Drop-in replacement - installs directly into the factory airbox with no modifications
• 4-layer oiled cotton gauze media for high airflow and reliable contaminant capture
• Engineered to increase horsepower and acceleration over OEM paper filters
• Pre-oiled and ready to install straight out of the box
• Washable and reusable - cleaning interval every 75,000 miles under normal conditions
• Compatible with OEM airbox and factory MAF sensors - no recalibration required
• Reduces long-term filter replacement costs and environmental waste
• Backed by K&N's No-Hassle Lifetime Limited Warranty

Specifications

• Part Number: 33-2070
• Filter Style: Panel Air Filter (Flexible Frame)
• Filter Media: Oiled Cotton Gauze
• Outside Length: 9.25 in (235 mm)
• Outside Width: 6.875 in (175 mm)
• Height: 1.0 in (25 mm)
• Filter Re-Oiling Amount: approx. 1.0 oz (30 ml)
• Weight: 0.8 lb (0.36 kg)
• Compatible Engine Sizes: L6 2.0L, 2.2L, 2.5L, 2.8L, 3.0L, 3.2L (M50 / M52 / M52TU / M54 / S50 / S52)
• Washable: Yes
• Warranty: No-Hassle Lifetime Limited

Included Components

• 1x K&N 33-2070 High-Flow Panel Air Filter

Product Description

The K&N 33-2070 is a washable, reusable drop-in replacement air filter engineered for a wide range of BMW models spanning the E36, E38, E39, E83, E85, and E36/7 platforms - covering the 3 Series, 5 Series, 7 Series, Z3, Z4, and X3 with inline-6 engines from the M50 through M54 family. Its 4-layer oiled cotton gauze design delivers significantly more airflow than an OEM paper filter while maintaining full engine protection, and drops directly into the factory airbox without any modification. The flexible panel frame seats securely and is fully compatible with OEM MAF sensors and engine management systems.

Whether fitted to a daily-driven E39 528i, a spirited E36 M3, or a weekend Z3 roadster, the K&N 33-2070 only needs cleaning every 75,000 miles - making it a practical long-term performance upgrade across all supported BMW applications. With coverage spanning over 25 distinct model variants across three BMW generations and multiple inline-6 engine codes, this is one of the most versatile drop-in filters available for classic BMW M50/M52/M54 owners.