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Porsche > 964 (911) (1989-1994) > 964 (911) TURBO 3.6L 1991-93 > Engine Electrical >

Air Mass/Flow Sensors

Air Mass/Flow Sensors

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Air Mass/Flow Sensors. Porsche 911 / 964 - 964606050X
1
Air Mass/Flow Sensors. Porsche 911 / 964
Special Order item
930606123X
Product Information
Product Information
exchange
Reconditioned Air Mass / Flow Sensor.
Please note:
Reconditioned units are sold on an exchange basis, A surcharge of £625.00 will be held and then refunded when the old one is returned.

A mass airflow sensor is used to determine the mass of air entering an electronically fuel-injected engine. The air mass information is necessary for the engine control unit (ECU) to calculate and deliver the correct fuel mass to the engine. Air changes its density as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the ambient temperature and altitude, and this is an ideal application for a mass sensor.

Fits:
Porsche 911 3.2L 1984-89
Porsche 964 1990-94



    PLEASE NOTE:
  • The surcharge for this reconditioned part will be refunded when the exchange unit is received and approved by us and the relevant manufacturer.
  • Please note, surcharge refunds often take an average of 6 to 8 weeks to be approved by the manufacturer.
  • Acceptance of the exchange part is at the manufacturer's discretion, based on the part being fit for reconditioning.
  • All surcharges and exchanges are subject to our terms and conditions.




Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

930606123X
964606050X

The product you are viewing cross references to these numbers
Air Mass/Flow Sensors. Porsche 911 / 964 - 964606050X, 930606123X, 96460605000, MSU001691 - BP PS9055
2
Air Mass/Flow Sensors. Porsche 911 / 964
930606123X/1
Product Information
Product Information
Air Mass / Flow Sensor
This OE Match air mass / flow sensor is a replacement intake air measurement sensor for Porsche 911 and 964 models. This air mass / flow sensor fits in the engine intake system, positioned where it can measure incoming air before it reaches the throttle body / intake manifold. It connects to the vehicle’s engine management wiring and intake ducting according to the factory layout.

Fits:
Porsche 911 3.2L 1984 - 1989
Porsche 964 1990 - 1994

Diagram ref no 1

The air mass / flow sensor measures the volume or flow of air entering the engine intake system. This information is used by the engine control system to calculate the correct fuel delivery, helping maintain smooth running, throttle response, fuel economy, and emissions performance.

Functions
• Measures incoming intake air flow
• Sends air flow information to the engine management system
• Supports correct fuel mixture calculation
• Helps maintain smooth idle and throttle response
• Supports reliable engine performance and drivability
• Replaces faulty, worn, contaminated, or failed original air flow sensors
• OE Match replacement for intake and fuel injection system repair.

Why Replace This Part?
Air mass / flow sensors can fail or become inaccurate due to age, contamination, electrical faults, worn internal components, intake leaks, or long-term use. A faulty sensor may cause rough idle, hesitation, poor throttle response, flat spots, increased fuel consumption, emissions faults, difficult starting, or poor running. Replacing the sensor helps restore accurate intake air measurement and correct engine management operation.

When to Replace This Part
•  The engine has rough idle, hesitation, or poor throttle response
•  Air flow sensor fault codes or mixture faults are present
•  Fuel consumption has increased noticeably
•  The engine runs too rich or too lean
•  Starting or warm-running issues are present
•  The sensor is contaminated, damaged, or electrically faulty
•  The intake or fuel injection system is being serviced or repaired

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

930606123X
964606050X
930606123X
96460605000
MSU001691

The product you are viewing cross references to these numbers
DISPLAYING 1 to 2 (of 2 products)
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About Air Mass/Flow Sensors

Air Mass Sensors – Precision Airflow Measurement for Porsche Performance

Air mass sensors (also known as mass air flow sensors or MAF sensors) are critical components in your Porsche’s engine management system. They measure the exact volume and density of air entering the engine, allowing the ECU to calculate the correct air-fuel mixture for efficient combustion, performance, and emissions control.

At Design911, we offer a comprehensive range of genuine and high-quality air mass sensors for Porsche models including 911, Boxster, Cayman, Cayenne, Macan, and Panamera. Each sensor is designed for precision accuracy, responsive measurement, and long-term reliability — ensuring smooth power delivery, optimal fuel economy, and consistent engine performance.

What Do Air Mass Sensors Do?

The air mass sensor monitors the flow of incoming air to the engine and sends data to the vehicle’s ECU (Engine Control Unit). Its main functions include:

  • Measuring air intake to calculate the optimal air-fuel ratio.
  • Ensuring efficient combustion for performance and emissions compliance.
  • Supporting fuel economy by adjusting fuel delivery based on driving conditions.
  • Maintaining smooth engine operation under all loads and temperatures.

A properly functioning MAF sensor ensures your Porsche delivers the responsiveness, efficiency, and precision it was engineered for.

Why Do Air Mass Sensors Fail?

Air mass sensors are delicate electronic components and can degrade over time due to contamination, wear, or electrical issues. Common causes of failure include:

  • Contamination from dirt, oil vapour, or air filter residue coating the sensor wire.
  • Electrical faults or corrosion in the wiring harness or connectors.
  • Sensor burnout due to prolonged high temperatures.
  • Air leaks downstream of the sensor causing incorrect readings.
  • Use of low-quality air filters or poor servicing introducing debris into the intake.

Symptoms of a failing air mass sensor include rough idling, reduced power, poor acceleration, increased fuel consumption, or an illuminated engine warning light.

Why Replace a Faulty Air Mass Sensor?

A faulty or inaccurate MAF sensor can severely impact your Porsche’s performance, leading to poor drivability, high fuel use, and potential damage to other engine components. Replacing it restores proper airflow measurement and engine efficiency.

Benefits of replacement include:

  • Restored throttle response and smooth power delivery.
  • Optimised fuel economy and emissions control.
  • Prevention of stalling, hesitation, or misfires.
  • Reliable, manufacturer-quality sensor performance and lifespan.

All air mass sensors supplied are made to meet or exceed exacting engineering standards, using advanced materials and sensor technology for precision airflow measurement and long-lasting durability.

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