AEM 21-879C Cold Air Intake System for 2017-2021 BMW 230i-330i-430i 2.0L B46/B48

Vehicle Fitment

• 2017-2021 BMW 230i (F22/F23, 2.0L B46/B48 Turbo I4, RWD)
• 2017-2021 BMW 230i xDrive (F22/F23, 2.0L B46/B48 Turbo I4, AWD)
• 2017-2021 BMW 330i (F30/G20, 2.0L B46/B48 Turbo I4, RWD)
• 2017-2020 BMW 330i xDrive (F30/G20, 2.0L B46/B48 Turbo I4, AWD)
• 2017-2019 BMW 330i GT xDrive (F34, 2.0L B46/B48 Turbo I4, AWD)
• 2020 BMW 330i GT (F34, 2.0L B46/B48 Turbo I4, RWD)
• 2017-2020 BMW 430i (F32/F33, 2.0L B46/B48 Turbo I4, RWD)
• 2017-2020 BMW 430i xDrive (F32/F33, 2.0L B46/B48 Turbo I4, AWD)
• 2017-2020 BMW 430i Gran Coupe (F36, 2.0L B46/B48 Turbo I4, RWD)
• 2017-2020 BMW 430i xDrive Gran Coupe (F36, 2.0L B46/B48 Turbo I4, AWD)

Fitment Notes

• Not CARB compliant; not legal for sale or use in California
• Fits vehicles equipped with the B46 or B48 2.0L turbocharged engine only
• Does not fit 2021+ G22/G23/G26 430i or 2022+ G42 230i models

Features

• Dyno-tested estimated gain of 9 HP at 4900 RPM
• AEM Dryflow synthetic air filter requires no oil and lasts up to 100,000 miles before cleaning
• Mandrel-bent aluminum intake tube with gunmetal gray powder coat finish
• Custom-shaped heat shield with lid isolates intake from engine bay heat
• High-flow tapered cylinder filter design maximizes airflow and filtration
• Washable and reusable filter media eliminates replacement filter costs
• Stainless steel worm gear clamps for secure, leak-free connections
• Direct bolt-on installation using common hand tools in approximately 90 minutes

Specifications

• Estimated horsepower gain: 9 HP @ 4900 RPM
• Air filter color: Red
• Air filter material: Non-woven synthetic (oil-free)
• Air filter outlet shape: Round
• Intake pipe material: Mandrel-bent aluminum
• Intake pipe finish: Gunmetal gray powder coat
• Clamp quantity: 3
• Clamp material: Stainless steel
• Coupler quantity: 1
• Replacement filter: AEM 21-2110DK
• Weight: 12 lbs
• Warranty: AEM Lifetime Limited

Included Components

• 1x AEM Dryflow synthetic air filter (red)
• 1x Mandrel-bent aluminum intake tube (gunmetal gray)
• 1x Custom heat shield with lid
• 3x Stainless steel worm gear clamps
• 1x Silicone coupler
• 1x MAF sensor adapter (where required)
• 1x Mounting hardware kit
• 1x Installation instructions

Product Description

The AEM 21-879C Cold Air Intake System delivers measurable performance gains for 2017-2021 BMW models equipped with the B46 or B48 2.0L turbocharged engine. Dyno-tested to produce an estimated 9 horsepower at 4900 RPM, this intake system replaces the restrictive factory air box, filter, and intake tubing with a high-flow design that allows the engine to breathe more freely and respond more aggressively to throttle input.

At the heart of this system is AEM's Dryflow synthetic air filter, featuring oil-free filter media that provides outstanding filtration while eliminating the mess and maintenance associated with oiled cotton gauze filters. The filter can be used for up to 100,000 miles before cleaning is needed, depending on driving conditions, and is fully washable and reusable for a lifetime of service. The mandrel-bent aluminum intake tube features a durable gunmetal gray powder coat finish that resists corrosion and complements the engine bay aesthetics of modern BMWs.

A custom-shaped heat shield with lid is included to isolate the intake from engine bay heat, ensuring the filter draws cooler, denser air for optimal combustion efficiency. Installation is straightforward using common hand tools and can typically be completed in 90 minutes or less. This intake system is backed by AEM's Lifetime Limited Warranty. Note that this product is not CARB compliant and is not legal for sale or use in California and other states adopting California emissions standards.