AEM 21-825DS Cold Air Intake for 2007-2013 BMW 135i/335i/1M/535i 3.0L

Vehicle Fitment

• 2007-2010 BMW 335i (3.0L N54/N55 inline-6)
• 2009-2010 BMW 335i xDrive (3.0L inline-6)
• 2011-2013 BMW 335is (3.0L inline-6)
• 2008-2010 BMW 135i (3.0L N54/N55 inline-6)
• 2011 BMW 1 Series M (3.0L inline-6)
• 2008-2010 BMW 535i (3.0L inline-6)
• 2009-2010 BMW 535i xDrive (3.0L inline-6)
• 2007-2008 BMW 335xi (3.0L inline-6)

Features

• Performance cold air intake system engineered for specific BMW 3.0L inline-6 models
• Tuned and dyno-tested to improve horsepower, torque, acceleration, and engine sound
• Roto-molded aerodynamic air box with oversized Dryflow synthetic washable filter
• Dryflow media - oil-free, washable, reusable up to ~100,000 miles between services
• Direct replacement for restrictive factory intake for enhanced airflow
• Easy installation using common tools with included mounting hardware
• Improves throttle response and overall engine efficiency
• Limited lifetime manufacturer warranty

Specifications

• Part number: AEM 21-825DS
• Application: Cold air intake system
• Fitment years: 2007-2013
• Vehicles: BMW 135i, 335i, 1 Series M, 535i & variants
• Engine: 3.0 L inline-6 (N54/N55 platforms)
• Estimated horsepower gain: ~8.7 HP @ ~4300 RPM
• Air filter material: non-woven synthetic Dryflow media
• Air filter color: gray
• Intake pipe material: high-density cross-linked polyethylene (black)
• Street legality: not legal for sale or use in California on pollution-controlled vehicles
• Warranty: limited lifetime

Included Components

• 1x Roto-molded aerodynamic air box with integrated intake duct
• 1x Dryflow synthetic washable air filter (gray)
• All required mounting hardware
• Installation instruction sheet

Product Description

The AEM 21-825DS Cold Air Intake System is a performance-engineered intake upgrade designed for select **BMW models equipped with the 3.0 L inline-6 engine** on platforms including the BMW 135i, 335i, 1 Series M, and 535i from 2007 through 2013. By replacing the restrictive factory air intake housing with a high-flow aerodynamic air box and oversized Dryflow synthetic air filter, this system improves airflow into the engine, helping enhance horsepower, torque, and throttle response with a smoother, more responsive power delivery.

AEM's Dryflow synthetic media provides excellent filtration performance without the need for oil, and is washable and reusable for long-term use. The intake draws fresh air through factory fresh air inlets into the optimized air box, reducing intake air temperature and improving combustion efficiency. Installation is straightforward using common tools and included hardware. While this system is engineered to boost performance, it is **not legal for sale or use in California on pollution-controlled motor vehicles** - check local regulations before purchase. Backed by AEM's limited lifetime warranty, the 21-825DS offers a durable performance upgrade for BMW inline-6 enthusiasts.