SKU: 33-2005 | UPC: 024844001665
K&N 33-2005 Replacement Air Filter for BMW Fuel-Injected Cars 1975-1991
K&N 33-2005 is a direct drop-in replacement high-flow air filter designed for BMW fuel-injected models from 1975 to 1991. It fits into your factory airbox without modifications and uses layered oiled cotton media to deliver more airflow for added horsepower and acceleration. This reusable filter lasts the life of your vehicle while protecting the engine from contaminants.
Key Features
- 4 Layers of Protection: Multiple layers of premium cotton gauze with a tacking agent form a mesh that traps dirt and debris while allowing maximum airflow through.
- Clean Every 5 Years: Requires cleaning only every 75000 miles under normal highway driving or 5 years at 15000 miles per year average.
- Easy Installation: Pre-oiled and ready to drop straight into the factory airbox for fast performance gains with no cutting or tools needed.
- Engineered Power: Advanced media design increases horsepower acceleration and engine performance over stock paper filters.
- Lifetime Warranty: Backed by K&N No-Hassle Lifetime Limited Warranty for stock replacement filters limitations apply.
Product Notes
- Filter measures 10.25 in length x 7.938 in width x 1.563 in height with 3.5 in round inlet.
- Washable and reusable reduces landfill waste from over 200 million disposable filters yearly.
- Saves up to $125 over 200000 miles versus buying multiple OEM filters at MSRP.
Installation Notes
- Professional installation recommended.
- Direct OEM replacement pops into stock airbox in minutes.
- Pre-oiled media no additional oiling required at install.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1975-1976 | BMW | 3.0Si | Base |
| 1984-1985 | BMW | 318i | Base |
| 1980-1983 | BMW | 320i | Base |
| 1984-1985 | BMW | 325e | Base |
| 1982-1985 | BMW | 528e | Base |
| 1979-1981 | BMW | 528i | Base |
| 1977-1978 | BMW | 530i | Base |
| 1983-1984 | BMW | 533i | Base |
| 1985-1987 | BMW | 535i | Base |
| 1988 | BMW | 535is | Base |
| 1985-1989 | BMW | 635CSi | Base |
| 1978-1984 | BMW | 733i | Base |
| 1985-1987 | BMW | 735i | Base |
| 1988-1991 | BMW | M3 | Base |
Why Choose K&N?
- Over 50 years designing performance air filters for street and racing.
- Manufactured with premium materials for lifelong durability.
- Engineered in the USA for precise vehicle fit and power gains.
Frequently Asked Questions
- Q: Will K&N 33-2005 fit my 1987 BMW 535i?
A: Yes it is a confirmed direct fit for 1985-1987 BMW 535i Base models and all listed BMW fuel-injected vehicles from 1975-1991. - Q: What material is the filter made from?
A: Oiled cotton gauze in four layers treated with a proprietary tacking agent for filtration and high airflow. - Q: What does the warranty cover?
A: No-Hassle Lifetime Limited Warranty covers defects in materials or workmanship for the vehicle life limitations apply see K&N for details.
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Sturdy cardboard box 11 in x 8 in x 2 in
- Weight: 1.3 lbs
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