Spectra MA321 Mass Air Flow Sensor - Left or Right

Spectra MA321 Mass Air Flow Sensor

The Spectra MA321 mass air flow sensor is built for direct replacement on select Infiniti and Nissan applications. It uses a programmable ceramic circuit board with a premium silicon coating to help protect the sensor from under-hood heat swings and road vibration, while platinum resistance thermometer technology supports quicker signal response and steady airflow measurement.

Key Features

• Programmable ceramic circuit board for stable sensor operation
• Premium silicon coating helps protect against temperature fluctuation and vibration
• Platinum resistance thermometer sensors for faster signal response
• Direct-fit mass air flow sensor for emission control service
• Cross-references Hitachi Automotive MAF0102 and Standard Ignition MAS0339

Detailed Description

Use the Spectra MA321 when replacing a failing mass air flow sensor on Infiniti QX60, Q50, Q70, M35h, or Nissan Altima, Murano, Pathfinder, and Sentra applications. This sensor measures incoming air so the engine control system can calculate fuel delivery more accurately, which is critical for drivability and emissions performance. It is a practical replacement for vehicles such as the 2014-2020 Infiniti QX60, 2014-2018 Infiniti Q50 and Q70, and select 2013-2016 Nissan models listed in the fitment data.

What It Helps Solve

• Rough idle caused by inaccurate airflow readings
• Hesitation or stumble during acceleration
• Check engine lights related to mass air flow sensor faults
• Poor fuel trim behavior from incorrect air measurement
• Emissions test failures tied to sensor performance

Installation Notes and Tips

Confirm the vehicle position and sensor style before ordering, since some applications use left or right sensors and others are sensor-only configurations. For fitment, this part fits 2014-2020 Infiniti QX60, 2014-2018 Infiniti Q50, 2014-2018 Infiniti Q70, 2012-2013 Infiniti M35h, 2016 Nissan Altima, 2016 Nissan Murano, 2016 Nissan Sentra, 2013-2015 Nissan Altima, 2013-2015 Nissan Sentra, and 2014 Nissan Pathfinder as listed. Verify connector match and OE number before installation.

Quality Assurance

Spectra builds this sensor with materials and circuit design intended to maintain signal consistency in demanding engine-bay conditions. The MA321 is a replacement option for OE-style airflow sensor service on the listed Infiniti and Nissan vehicles.