Performance Air Filter for Mercedes-AMG A 45, CLA 45, GLA 45 & Lotus Emira (2019-2026)

High-Flow BMC Performance Air Filter for Mercedes-AMG A45, CLA45, GLA45 (W176/C117/X156)

What it Does: The BMC Performance Air Filter directly replaces the restrictive factory paper filter in the Mercedes-AMG A45, CLA45, and GLA45 to reduce intake pressure drop, optimize airflow volume, and sharpen throttle response.

The Stock Mercedes-AMG A45, CLA45, GLA45 Intake Restriction

The high-output 2.0-liter turbocharged engine in the Mercedes-AMG A 45 (W177), CLA 45 (C118), GLA 45 (H247) and Lotus Emira operates under high boost pressures, requiring massive CFM capacity. Factory cellulose paper filters restrict laminar airflow via tight fiber density, causing parasitic intake vacuum and higher intake air temperatures under load.

Furthermore, OEM paper elements degrade rapidly when exposed to humidity and fine particulate loading, escalating pressure drop across the intake tract and stifling turbocharger spool efficiency.

The Engineering Solution

Engineered by BMC, the FB01099 panel filter utilizes multi-layered, low-viscosity oiled surgical cotton gauze sandwiched within an epoxy-coated alloy mesh. This architecture stabilizes the intake charge, allowing significantly higher volumetric airflow while filtering down to 7 microns without media breakdown.

Molded as a single-piece component with proprietary polyurethane, it eliminates localized sealing distortion and bypass leaks, seating directly into the factory airbox with zero mass air flow (MAF) sensor disruption or intake plumbing modification.

Technical Specifications

Compatibility & OEM Reference

Fits the following vehicles (BMC fitment data):

• Lotus Emira (131) 2.0 Turbo (365 HP) | 2023-2025
• Lotus Emira (131) 2.0 Turbo SE (406 HP) | 2025+
• Mercedes CLA (C118/W118/X118) AMG CLA 45 (387 HP) | 2019+
• Mercedes CLA (C118/W118/X118) AMG CLA 45 S (421 HP) | 2019+
• Mercedes A-Class (W177) AMG A 45 (387 HP) | 2019+
• Mercedes A-Class (W177) AMG A 45 S (421 HP) | 2019+
• Mercedes GLA (H247) AMG GLA 45 (387 HP) | 2019+
• Mercedes GLA (H247) AMG GLA 45 S (421 HP) | 2019+

OEM Cross Reference (BMC): MERCEDES-BENZ A1390940100

Frequently Asked Questions & Fitment Warnings

Does this fit the W176, C117, and X156 A-Class, CLA-Class, and GLA-Class?

Yes, this is a direct drop-in replacement for the Mercedes-AMG 45 platform (A 45, CLA 45 and GLA 45, 2019+) and the Lotus Emira 2.0 Turbo (2023+). Confirm your OEM airbox shape and filter dimensions prior to ordering if running non-AMG standard 4-cylinder models.

Is an ECU recalibration required after installing this filter?

No, this panel filter drops directly into the OEM housing and operates seamlessly within the factory fuel trims and MAF sensor calibrations.

The Mercedes-Benz Engineering Standard

Engineered for high-output European turbocharged applications, this BMC filtration system maintains strict OEM tolerances, ensuring zero check engine lights, airtight perimeter sealing, and continuous reliability under sustained boost pressure.