Spectra MA391 Mass Air Flow Sensor

Reliable Mass Air Flow Sensor for Ford, Land Rover, and Lincoln Vehicles

The Spectra MA391 Mass Air Flow Sensor is designed to provide accurate airflow measurement for a range of Ford, Land Rover, and Lincoln models. This sensor helps maintain optimal engine performance by ensuring precise air-fuel mixture control.

Key Features of the Spectra MA391 Mass Air Flow Sensor

• Compatible with Ford, Land Rover, and Lincoln vehicles including Discovery Sport, E-350 Super Duty, EcoSport, Edge, Explorer, Fiesta, Focus, Fusion, LR2, MKT, MKZ, Mustang, Range Rover Evoque, Taurus, Transit series
• Direct replacement part number MA391 for easy identification
• Ensures accurate measurement of incoming air for improved engine efficiency
• Designed to meet OEM specifications for reliable fit and function
• Durable construction to withstand engine bay conditions

Detailed Description of the Spectra MA391 Mass Air Flow Sensor

The Spectra MA391 Mass Air Flow Sensor is engineered to deliver precise airflow data to the engine control unit (ECU) for vehicles such as the Ford Explorer, Lincoln MKZ, and Land Rover Discovery Sport. By accurately measuring the volume and density of air entering the engine, this sensor enables the ECU to adjust fuel injection and ignition timing accordingly. This part number MA391 is a direct replacement for factory sensors, ensuring compatibility and straightforward installation. It supports a wide range of models including the Ford Transit-150, Transit-250, and Transit-350 HD, making it a versatile choice for emission control and engine management.

Common Issues Addressed by the Spectra MA391 Sensor

• Engine stalling or rough idling due to incorrect air-fuel mixture
• Reduced fuel efficiency caused by inaccurate airflow readings
• Check engine light triggered by faulty mass air flow sensor signals
• Poor acceleration or hesitation during throttle response
• Emission control problems related to improper sensor data

Installation Notes and Tips

• Ensure the ignition is off before removing the old sensor
• Disconnect the battery to prevent electrical shorts during installation
• Handle the sensor carefully to avoid damage to the sensing element
• Clean the sensor mounting area to ensure a proper seal
• Verify electrical connections are secure after installation

Quality Assurance and Warranty Information

The Spectra MA391 Mass Air Flow Sensor is manufactured to meet or exceed OEM standards for durability and performance. While specific warranty details may vary, Spectra parts typically come with a limited warranty covering defects in materials and workmanship. This ensures confidence in the sensor’s reliability for emission control and engine management applications across compatible Ford, Land Rover, and Lincoln models.