K&N 33-3133 High-Flow Air Filter for 2019-2026 Mercedes-Benz A/CLA/GLA/GLB-Class

Vehicle Fitment

• 2019-2022 Mercedes-Benz A220 (Base, 4Matic, 2.0L L4 Turbo Gas)
• 2019-2022 Mercedes-Benz A250 (Base, 4Matic, 2.0L L4 Turbo Gas)
• 2020-2022 Mercedes-Benz A35 AMG (4Matic, 2.0L L4 Turbo Gas)
• 2020-2026 Mercedes-Benz CLA250 (Base, 4Matic, 2.0L L4 Turbo Gas)
• 2020-2026 Mercedes-Benz CLA35 AMG (4Matic, 2.0L L4 Turbo Gas)
• 2021-2026 Mercedes-Benz GLA250 (Base, 4Matic, 2.0L L4 Turbo Gas)
• 2021-2026 Mercedes-Benz GLA35 AMG (4Matic, 2.0L L4 Turbo Gas)
• 2020-2026 Mercedes-Benz GLB250 (Base, 4Matic, 2.0L L4 Turbo Gas)
• 2021-2026 Mercedes-Benz GLB35 AMG (4Matic, 2.0L L4 Turbo Gas)

Fitment Notes

• Does NOT fit GLA45 AMG or CLA45 AMG - those use the higher-output AMG M139 engine with a different airbox
• Does NOT fit pre-2019 GLA250 (H247 platform) - use K&N 33-2995 instead
• A220 and A250 models are sold in North America only in Canada; A35 AMG sold in Canada only
• All 35 AMG variants are 4Matic (AWD) only

Features

• Multi-layer oiled cotton gauze media delivers up to 50% more airflow than OEM paper filters, improving throttle response and engine power across the M260 2.0L platform
• Pre-oiled and ready to install directly into the factory airbox - no modifications required, drop-in replacement in minutes
• Washable and reusable design engineered to outlast the vehicle, eliminating repeated filter purchases over the ownership period
• Epoxy-coated aluminum wire mesh on both faces protects the cotton gauze media and maintains filter shape under high airflow
• Fully compatible with OEM mass airflow sensors and vehicle electronics - confirmed to not trigger check engine lights or void factory warranty
• TUV-approved (Europe) and emissions legal in all 50 U.S. states
• Backed by K&N's 10-Year / 1,000,000-Mile Limited Warranty

Specifications

• Part Number: 33-3133
• Filter Style: Panel (Drop-In Replacement)
• Filter Media: Layered Oiled Cotton Gauze
• Outside Length: 10.75 in. (273 mm)
• Height: 1.5 in. (38 mm)
• Filter Color: Red
• Cleaning Interval: Every 50,000 miles under normal driving conditions
• Emissions Compliance: Legal in all 50 U.S. states; TUV-approved (Europe)
• Warranty: 10-Year / 1,000,000-Mile Limited Warranty

Included Components

• 1x K&N 33-3133 Pre-Oiled Cotton Gauze Panel Air Filter

Product Description

The K&N 33-3133 is a direct-fit high-flow replacement air filter engineered for the Mercedes-Benz MFA2-platform compact lineup, covering the A220, A250, A35 AMG, CLA250, CLA35 AMG, GLA250, GLA35 AMG, GLB250, and GLB35 AMG - all sharing the turbocharged M260 2.0L engine family. Its layered, oiled cotton gauze construction flows up to 50% more air than the restrictive factory paper filter, resulting in improved throttle response and more efficient combustion without any hardware changes. Installation is a straight drop-in swap into the factory airbox with no tools beyond a screwdriver.

Unlike disposable OEM paper filters that must be replaced every 15,000-20,000 miles, the K&N 33-3133 is designed to be cleaned and re-oiled every 50,000 miles and lasts the entire life of the vehicle. It is fully compatible with all OEM electronics including the factory MAF sensor, and has been TUV-approved for European markets and confirmed legal in all 50 U.S. states. Backed by K&N's 10-Year / 1,000,000-Mile Limited Warranty, this filter delivers long-term value alongside a genuine performance and airflow improvement.