Product Overview

The mass air flow sensor, OEM number A6450900048, is fitted across an unusually wide range of current-generation Mercedes-Benz models, including the A-Class (W176), B-Class (W246, W242), C-Class (W205, C205, A205, S205), E-Class (W212, S212, A207), CLA, and GLK, spanning model years 2009-2020. Since this hot-film sensor covers so many popular Mercedes model lines and body styles, it's a genuinely high-turnover part for anyone stocking Mercedes engine management components.

Worn or failing units typically show up as black smoke from the exhaust, unstable idle speed, stalling, or a check engine light with a mass air flow fault code. GSK Auto manufactures this sensor to OEM specification at our Ningbo, China facility, with every unit tested before packing. We supply at wholesale volume with low MOQ and support private label packaging, with our team available to confirm fitment before shipping.

Replacement OEM Numbers

Cross-Reference OEM Number

A6519050500, 5WK98101, 5WK98105

(Confirm against your VIN or chassis code before ordering - this sensor spans an unusually wide range of Mercedes models and body styles, so it's worth double-checking the exact chassis and engine before ordering at volume.)

What Is a Mass Air Flow Sensor?

Function: The mass air flow sensor measures the volume and density of air entering the engine, sending that data to the ECU so it can calculate the correct amount of fuel to inject for an optimal air-fuel mixture.

Working Principle: This hot-film sensor design heats a thin film element and measures the cooling effect as air passes over it, converting that data into a precise real-time airflow reading that the ECU uses to determine fuel delivery under all driving conditions.

Importance: Since fuel injection quantity is calculated directly from the airflow reading, an inaccurate or failing MAF sensor can cause the engine to run too rich or too lean, affecting performance, emissions, and fuel economy.

Common Failures & Signs: Contamination or wear on the hot-film sensor element affecting measurement accuracy. Black smoke from the exhaust linked to an overly rich fuel mixture. Unstable idle speed or stalling. Check engine light with a mass air flow sensor fault code.

Key Features

OEM-standard fitment - matches factory sensor output and connector configuration for the A6450900048 application.

Precision manufacturing - hot-film sensor element design for accurate, responsive airflow measurement.

Long service life - PBT-GF30 housing construction resists heat and under-hood conditions.

Excellent fitment - direct bolt-in replacement, no modification required.

Corrosion resistance - housing construction resists moisture and under-hood heat exposure.

Reliable performance - consistent, stable signal output matching factory calibration.

Benefits

Importers - high-turnover part covering an unusually wide range of current Mercedes models, simplifying inventory.

Wholesalers - steady demand from several of Mercedes' highest-volume platforms.

Repair Shops - OEM-spec fitment reduces comeback risk on engine management jobs.

Distributors - private label packaging available for building a branded catalog.

End Customers - restored smooth idle, clean exhaust, and fuel efficiency.

Packaging & Shipping

Standard export packaging, sized for a sensor component. Customized packaging available for distributor branding. OEM-style and private label printing on request. Container loading handled directly, with mixed-SKU consolidation for smaller orders. Worldwide shipping to Europe, North America, South America, the Middle East, Africa, and Southeast Asia.

Why Choose GSK Auto

GSK Auto manufactures factory-direct, keeping pricing tied to production cost. This sensor is built to OEM specification and tested before packing. We support low MOQ, private label packaging, and worldwide shipping, with our technical team available to confirm fitment before you order.

Call to Action

Sourcing mass air flow sensors for Mercedes A-Class, B-Class, C-Class, E-Class, CLA, or GLK vehicles? Contact GSK Auto for a wholesale quote, catalog, or OEM/private label cooperation.