Air Mass Sensors w/ Engine Air Duct 6420908237 Fit Mercedes W211 W164 X164 ML320

Air Mass Sensors with Engine Air Duct for Mercedes

This air mass sensor and engine air duct assembly measures incoming airflow so the engine control unit can calculate the correct fuel mixture, and it is a direct replacement option cross-referenced to OEM part number 6420908237.

Overview

This air mass sensor with engine air duct is a replacement assembly that meters intake airflow and relays that data to the ECU for accurate fuel delivery. It is built for owners of Mercedes W211, W164, and X164 platform vehicles who need to restore proper air measurement. The air mass sensor and duct combination simplifies replacement by combining two commonly worn components in one unit.

Built For Performance

• Combined air mass sensor and engine air duct in a single assembly
• Cross-referenced to OEM part number 6420908237 for fitment matching
• Housing designed to seal against unmetered air entering the intake tract
• Sensor element positioned for consistent readings across the airflow range
• Connector and mounting points matched to the original layout

Fits These Machines

• for Mercedes W211
• for Mercedes W164
• for Mercedes X164
• for Mercedes ML320

On-The-Job Use

• Restoring drivability after a failed or contaminated mass air sensor
• Replacing a cracked or brittle intake duct that lets unmetered air in
• Routine maintenance on high-mileage Mercedes diesel and gasoline engines
• Diagnosing rough idle, lean codes, or reduced fuel economy

Specs At A Glance

Good To Know

Q: What symptoms point to a failing air mass sensor? A: Rough idle, hesitation, black smoke, and stored lean or mixture codes are common signs, and a scan tool reading of airflow values can confirm it. Q: Should the duct be replaced with the sensor? A: If the original duct is cracked or hardened, replacing both together prevents unmetered air leaks that would otherwise trigger the same faults again.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.