This AEM Cold Air Intake System (C.A.S.) lets the BMW 3.0L turbo inline-six breathe more freely than the restrictive factory intake housing, adding horsepower and torque. It's designed, tuned, and dyno-tested for this platform. Air enters from the factory fresh air inlets through a replacement air duct into a roto-molded, aerodynamic AEM air box housing an oversized AEM Dryflow synthetic washable air filter. The cone-shaped Dryflow filter is oil-free and can go up to 100,000 miles between cleanings depending on driving conditions. This intake is backed by AEM's Lifetime Limited Warranty. Some AEM intakes are not legal for sale or use in California and other states that have adopted California emission standards, while others are 50-state legal; view the vehicle applications below to determine legal status for this fitment.
Installation InstructionsAdditional Documentation
Specifications:
- Roto-molded, aerodynamic AEM air box with oversized Dryflow cone filter
- Washable, reusable, oil-free Dryflow synthetic filter media (up to 100,000 miles between cleanings)
- AEM Lifetime Limited Warranty
- Part Number: 21-825DS
Vehicle Applications
- 2011 BMW 1 Series M
- 2008 BMW 135i
- 2009 BMW 135i
- 2010 BMW 135i
- 2007 BMW 335i
- 2008 BMW 335i
- 2009 BMW 335i
- 2010 BMW 335i
- 2009 BMW 335i xDrive
- 2010 BMW 335i xDrive
- 2011 BMW 335is
- 2012 BMW 335is
- 2013 BMW 335is
- 2007 BMW 335xi
- 2008 BMW 335xi
- 2008 BMW 535i
- 2009 BMW 535i
- 2010 BMW 535i
- 2009 BMW 535i xDrive
- 2010 BMW 535i xDrive
- 2010 BMW Z4 sDrive30i
- 2011 BMW Z4 sDrive30i
- 2010 BMW Z4 sDrive35i
- 2011 BMW Z4 sDrive35i
- 2012 BMW Z4 sDrive35i
- 2013 BMW Z4 sDrive35i
- 2014 BMW Z4 sDrive35i
- 2015 BMW Z4 sDrive35i
- 2016 BMW Z4 sDrive35i
- 2011 BMW Z4 sDrive35is
- 2012 BMW Z4 sDrive35is
- 2013 BMW Z4 sDrive35is
- 2014 BMW Z4 sDrive35is
- 2015 BMW Z4 sDrive35is
- 2016 BMW Z4 sDrive35is
FAQ
What vehicles fit the AEM 21-825DS cold air intake?
AEM's fitment data for part number 21-825DS covers the BMW 1 Series M (2011), 135i (2008-2010), 335i (2007-2010), 335i xDrive (2009-2010), 335is (2011-2013), 335xi (2007-2008), 535i (2008-2010), 535i xDrive (2009-2010), and Z4 sDrive30i/35i/35is (2010-2016), all sharing the 3.0L F/I inline-six.
Does this intake fit the Z4 as well as the 335i?
Yes. AEM's fitment data for part number 21-825DS covers both the 1 Series/3 Series/5 Series and the Z4 model lines listed in the vehicle applications above.
Is the AEM 21-825DS intake legal in California?
Emissions legality varies by application; some AEM intakes are 50-state legal while others are not legal for sale or use in California and other CARB-adopting states. Verify status for this specific fitment before purchase.