K&N 33-2573 Replacement Air Filter for 1986-1997 Audi/BMW A6/530i/535i/730i/735i

Vehicle Fitment

• 1986-1994 BMW 730i / 730iL, 3.0L L6
• 1988-1991 BMW 530i, 3.0L L6
• 1986-1997 BMW 535i, 735i, 735iL (L6/V8, see notes)
• 1986-1997 Audi A6
• 1986-1997 Audi V8 Quattro

Fitment Notes

• Precise year ranges are confirmed by the manufacturer for the BMW 730i/730iL (1986-1994) and 530i (1988-1991) applications; the 535i, 735i, 735iL, Audi A6, and Audi V8 Quattro applications fall within the broader 1986-1997 range reported by multiple retailers, but individual model-year confirmation was not independently available for each - verify exact model year and engine before ordering
• This part was previously listed under K&N part number 33-2688

Features

• State-of-the-art layered, oiled cotton gauze media engineered to improve airflow
• 4 layers of premium cotton gauze treated with a tacking agent to trap contaminants
• Washable and reusable - designed to last the life of the vehicle
• Up to 99% filtration efficiency
• Only needs cleaning approximately every 75,000 miles under normal highway driving
• Pre-oiled and ready to drop directly into the factory air box
• Reduces landfill waste compared to disposable paper filters
• Backed by K&N's No-Hassle Lifetime Limited Warranty

Specifications

• Filter Shape: Panel
• Filter Material: Cotton Gauze
• Height: 1.125 in (29mm)
• Outside Length: 14.875 in (378mm)
• Outside Width: 5.813 in (148mm)
• Weight: 1.2 lb (0.6 kg)
• Top Style: Open
• Re-Oiling Amount: 1.35 oz (40ml)
• Filtration Efficiency: Up to 99%
• Washable: Yes
• Cross-Reference Part Numbers: AC Delco A1247C, BMW 13721707021, Bosch 1457429869, Mahle LX106, Mann-Hummel C39161, WIX 46208, and others

Included Components

• 1x K&N 33-2573 Panel Air Filter

Product Description

The K&N 33-2573 is a washable, reusable panel air filter engineered as a direct drop-in replacement for the factory air filter on select 1986-1997 BMW and Audi models. Built from four layers of oiled cotton gauze, it's designed to improve airflow into the engine while maintaining high filtration efficiency, rated up to 99%.

Unlike disposable paper filters that need frequent replacement, the 33-2573 is designed to last the life of the vehicle. It only requires cleaning roughly every 75,000 miles under normal highway driving conditions, and is backed by K&N's No-Hassle Lifetime Limited Warranty - making it a cost-effective long-term alternative to repeated OE filter purchases.

This filter is confirmed for the BMW 730i/730iL (1986-1994) and 530i (1988-1991), with broader listed compatibility across the BMW 535i, 735i, 735iL, Audi A6, and Audi V8 Quattro within the 1986-1997 range. Given the age and platform overlap of these vehicles, owners should confirm their specific model year and engine configuration before ordering.