SKU: 57S-2003 | UPC: 024844384171
K&N BMW E90/91/92/93 335i N54 Performance Air Intake System 57S-2003
The K&N 57S-2003 Performance Air Intake System replaces the factory airbox on 2007-2010 BMW 335i models equipped with the N54 3.0L turbo engine across E90 sedan E91 wagon E92 coupe and E93 convertible chassis. This fully enclosed injection-molded airbox reduces airflow restriction straightens incoming air and delivers dyno-proven gains of 11.3 HP at 5515 RPM for stronger acceleration and torque across the RPM range. It maintains factory hose connections for a direct bolt-on upgrade that unlocks more engine potential.
Key Features
- High-Flow Design: Dramatically cuts air restriction versus stock setup allowing the N54 engine to breathe freely for noticeable power and throttle response improvements
- Washable Reusable Filter: Oiled cotton gauze media provides lifetime high-flow filtration cleanable in minutes for ongoing performance without replacement costs
- Enclosed Airbox: Injection-molded housing with removable lid smooths airflow directs cooler intake air and fits precisely in the OEM location
- Easy Bolt-On Install: Completes in 60 minutes or less using common tools no vehicle modifications or fabrication required
- Lifetime Durability: Engineered to last the life of your BMW backed by K&N No-Hassle Lifetime Limited Warranty
Product Notes
- Cleaning the air filter every 50,000 miles or as needed maintains peak performance use K&N cleaning kit for best results
- Removable lid allows quick filter access without removing the entire airbox
- Ships in protective packaging to prevent damage during transit
Installation Notes
- Professional installation recommended.
- Typically installs in 60 minutes or less retains factory air intake hose connection
- Includes all necessary hardware clamps and instructions uses existing mounting points
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2007 | BMW | 335i | Base |
| 2008 | BMW | 335i | Base |
| 2009 | BMW | 335i | Base |
| 2009 | BMW | 335i xDrive | Base |
| 2010 | BMW | 335i | Base |
Why Choose K&N?
- Proven track record with dyno-tested gains on thousands of applications including BMW N54 engines
- High-quality materials like injection-molded composites and premium filter media built for daily driving and track use
- Precision engineering matches factory fit while engineering freer breathing for real-world power
Frequently Asked Questions
- Q: Will this fit my 2008 BMW 335i E92 coupe with N54 engine?
A: Yes the 57S-2003 fits all 2007-2010 BMW 335i models E90 E91 E92 E93 chassis powered by the 3.0L N54 twin-turbo engine including sedan wagon coupe and convertible - Q: What material is the air filter and airbox made from?
A: The air filter uses four layers of oiled cotton gauze over wire mesh the airbox is durable injection-molded high-density polyethylene both washable and heat-resistant - Q: What does the warranty cover and how do I claim it?
A: K&N No-Hassle Lifetime Limited Warranty covers defects in materials or workmanship for the vehicle life contact K&N with proof of purchase for replacement
Shipping & Handling
- Method: Ground shipping via UPS or FedEx
- Availability: In stock – ships same or next business day
- Packaging: Single sturdy box 23 x 14 x 10 inches
- Weight: 9.35 lbs shipping weight
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